Answer:
When the match is struck a portion of the red phosphorus on the striking surface is converted into white phosphorus, which then ignites. The heat from this ignites the potassium chlorate, making the match head flame up.
Explanation:
Final answer:
The ignition of a match causes a combustion reaction involving P4S3 and KClO3, generating heat, light, and byproducts like carbon dioxide and water vapor.
Explanation:
The chemical responsible for the ignition of a match and subsequent acid production is a compound of phosphorus and sulfur, specifically P4S3 (tetraphosphorus trisulfide). When a strike-anywhere match is rubbed against a rough surface, friction generates enough heat to initiate a combustion reaction. The KClO3 (potassium chlorate) in the match head also plays a crucial role by providing the oxygen necessary for the phosphorus-sulfur compound to ignite.
Upon ignition, a series of reactions occur that result in the combustion of the match, using cellulose in the match and oxygen from the air to produce energy in the form of heat and light. The chemical reaction between these components forms carbon dioxide and water vapor as byproducts.
Use the copy of the Periodic Table of Elements below to obtain information about each element in the Mystery Clues list. Record your information on the Mystery Clues Data Table.
Mystery Clues:
A. This element has 12 electrons when the atom is electrically neutral.
B. This element is an alkaline-earth metals group. It has 20 protons.
C. This element has 7 electrons when the atom is electrically neutral.
D. An isotope of this element has 8 neutrons and a mass of 14.
E. This element has a chemical symbol Hg.
F. This element belongs to the same group as aluminum (Al) and has an atomic mass of 69.72.
Mystery Clues Data Table
Letter of Mystery Element Atomic Number Atomic Mass Number of Protons Total Number of Electrons when Electrically Neutral Element Symbol
A
B
C
D
E
F
honest the subject is since so it's not biology i think but plz help it is worth 50 pts!!!!!!
Answer: nitrogen , CALCIUM , nitrogen , Carbon-14 , Mercury , Boron
Explanation:
A. nitrogen
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of nitrogen-15? Socratic.
B. CALCIUM
CALCIUM - I have 20 neutrons and am found in your teeth and bones
C. nitrogen
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of nitrogen-15? Socratic.
D. Carbon-14
Carbon-14 atoms have two extra neutrons, giving them a total of 8 neutrons. Carbon-14 has an atomic mass of 14 ( = 6 protons + 8 neutrons).
E. Mercury
Mercury is a chemical element with symbol Hg and atomic number 80.
F. Boron group element, any of the six chemical elements constituting Group 13 (IIIa) of the periodic table. The elements are boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), and nihonium (Nh).
The subject of this question is Chemistry, and the student is asked to use the periodic table to determine information about each mystery element. They are provided with clues such as number of electrons, protons, neutrons, and chemical symbols to help identify the elements. With the help of the periodic table, the student can fill out a data table by matching the clues with the corresponding element.
Explanation:The subject of this question is Chemistry and it is targeting high school level students. The student has provided a list of mystery clues related to elements on the periodic table, and they are asked to use the periodic table to gather information about each element and fill out a data table. Let's break down each clue and find the corresponding information from the periodic table:
By using the given clues and referring to the periodic table, we were able to determine the identity of each mystery element.
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In addition to temperature, what other factor is taken into consideration to classify
climatic regions?
A: distance from bodies of water
B: altitude
C: precipitation
D: Ocean Currents
precipitation Explanation:
Final answer:
Precipitation (option C) is another factor considered when classifying climatic regions, and together with temperature, greatly influences the type of biome present. Elevation, latitude, wind systems, ocean currents, and proximity to water bodies are critical in shaping climate and biomes.
Explanation:
In addition to temperature, option C: precipitation is another factor taken into consideration to classify climatic regions. Precipitation, alongside temperature, is one of the two variables that most strongly contribute to the type of biome that exists in a particular area. Other factors that influence temperature, precipitation, and the distribution of climate regions include elevation, latitude, wind systems, ocean currents, position on a continent, and mountain barriers. These elements are integral in determining the climate and subsequently the biomes present in different regions. For example, elevation affects climate as temperatures generally decrease with increased altitude, leading to varied biomes along a mountain range.
Furthermore, the proximity to large water bodies also significantly influences climate by providing a temperature moderating effect. Ocean currents can affect temperature and seasonal weather events, such as the North Atlantic Current which brings warm water to the north, or the California Current which brings cooler water to the south. Geography, therefore, is complex and interconnected, with various physical and human factors shaping the classification of climatic regions and the distribution of ecosystems within them.
3 Which statement best explains the significance of
meiosis in the process of evolution within a species?
(1) The gametes produced by meiosis ensure the
continuation of any particular species by asexual
reproduction
(2) Equal numbers of eggs and sperm are produced
by meiosis.
(3) Meiosis produces eggs and sperm that are alike.
(4) Meiosis provides for variation in the gametes
produced by an organism.
Meiosis is significant in the process of evolution of a species as it provide for variation in the gametes produced by an organism. Thus, the correct option is D.
What is Meiosis?Meiosis is a type of cellular division. Meiosis is also known as reductional division. It is because, this type of cellular division produces offspring with reduced genetic content. The offspring produced has half of the chromosomal content as their parents and are called as haploids (n).
Meiosis is important cell division because it ensures that all the organisms produced through sexual reproduction contain the correct number of chromosomes in them. Meiosis also produces genetic variation through the way of the process of recombination during prophase I of Meiosis I.
Therefore, the correct option is D.
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What should a doctor examine to determine whether a patient's kidneys are
functioning correctly?
A. The patient's saliva
B. The patient's bile
C. The patient's urine
D. The patient's feces
Answer: The answer is C
Explanation: Urine as well as blood test could detect the function of the kidneys and how quickly body wastes are removed.
How will carbon capture reduce the impact of human activity on climate change
Answer:
Explanation: reduces green house effect.
Based on your knowledge of energy flow and light absorption, which color(s) of light
will provide energy for photosynthesis? (select all that apply)
Answer:
all except green
Explanation:
all except green because the plant is reflecting green light, not absorbing it :)
The energy flow and light absorption color should include red, orange, blue, and the violet. It does not include green.
What is photosynthesis?Photosynthesis refer to a process that should be used by the plants and the other organism for converting the light energy into the chemical energy via the cellular organism and after this it should be released for furl the activities related to the organism.
Therefore, we can conclude that the energy flow and light absorption color should include red, orange, blue, and the violet.
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Put the steps in order to describe the formation of a fossil.
organism dies
sediment becomes rock
layers of sediment cover
organism falls to bottom of ocean
organism
Hurrry
Organism, after which it perishes, sinks to the ocean floor, is covered by layers of silt, and finally becomes rock.
What is the formation of a fossil?Because soft tissue decays prior to the formation of a fossil, fossils are made from plant matter or an organism's bones.
Petrified fossils, mold and cast fossils, carbon film fossils, trace fossils, retained remains, compression fossils, impression fossils, and pseudo fossils are among the several forms of fossils. The remains of things that formerly lived are known as fossils.
The majority of fossils are created when live organisms perish and are buried by sediments. The outlines of the creatures are preserved when the sediments progressively solidify into rock.
Therefore, organism, after which it perishes, sinks to the ocean's floor, is covered by layers of silt, describe the formation of a fossil.
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While researching how genes are passed on from generation to generation, Gregor Mendel experimented with pea plants. From which structure in the pea plants’ flowers did Mendel obtain pollen?
A. Stamen
B. Anther
C. Ovule
D. Ovary
Answer:
B. Anther
Explanation:
Gregor Mendel, who was referred to as the FATHER OF GENETICS, was able to discover the principles that governs inheritance i.e. how genes were transferred from parents to their offsprings. To do this, he performed series of crosses using the pea plants, which he chose because of the desirable traits they had.
He performed this crosses using POLLINATION, which is the process whereby plants transfer their male gamete from male reproductive part to the female gamete of the female reproductive organ for fertilization to occur. The ANTHER is the part of the male flower responsible for producing and storing pollen (containing sperm). Hence, the ANTHER is the part of the male flower (STAMEN) that Mendel obtained pollen that he used in performing his crosses from.
What is the probability that offspring of parents with BB and Bb genotypes will have brown eyes?
Answer:3:1
Explanation:
Is access to clean water a human right, yes or no? Give reasons to support your answer
Answer:
Yes.
Explanation:
On 28 July 2010, through Resolution 64/292, the United Nations General Assembly explicitly recognized the human right to water and sanitation and acknowledged that clean drinking water and sanitation are essential to the realisation of all human rights.
Proteins are synthesized by the instructions coded into what nucleic acid?
A)RNA
B)DNA
C)tRNA
D)rRNA
Answer:
tRNA
Explanation:
What is happening at step 1?
Dead organisms
and este products
Foss
respiration: releasing CO2
photosynthesis: absorbing CO2
decomposing CO2 in the soil
Answer: Respiration: releasing CO2
Explanation: Photosynthesis is happening at step 2, and decomposition is occurring at step 4 with the soil and animal waste. I just used the process of elimination.
Which consequence of pollution is shown in the photograph?
A. Pollutants react with water and are deposited on Earth’s surface.
B. Eutrophication occurs in the presence of too many nutrients.
C. Pollutants break down the layer of ozone in the stratosphere.
D. Gaseous pollutants and particulate pollution form a haze over cities.
The consequence of pollution shown in the photograph is option D: Gaseous pollutants and particulate pollution form a haze over cities.
The photograph visually represents the presence of pollution in the form of a haze that hangs over urban areas. This haze is often caused by the emission of gaseous pollutants and particulate matter from various sources such as vehicles, factories, and power plants.
It is a visible manifestation of air pollution and can have detrimental effects on air quality, human health, and the environment.
The photograph shows that, due to pollution, gaseous pollutants and atmospheric pollution form fog over cities, as shown in option D.
What is the impact of this?
Lower incidence of solar rivers.Impairment of gas exchange.Increased respiratory problems.Extreme pollution causes polluting particles, less dense than air, to rise to the surface and combine with gaseous pollutant emissions, many from the burning of fossil fuels, remaining above the horizon, reducing visibility, and causing gas traps. inefficient, increasing the heat level and causing many respiratory problems.
13. Which of the following would not result in
secondary succession?
a. Forest fire
b. Flood
c. Logging
d. Volcanic eruption in the ocean
Answer:
D.
Explanation:
Secondary succession occurs in an area that has already been inhabited. If a new island forms from the volcanic eruption, new species may move in and start a new ecosystem there.
Secondary succession occurs in areas where an established ecosystem has been disrupted. This disruption can be caused by a forest fire, flood, or logging. However, a volcanic eruption in the ocean, which creates an entirely new biosphere, would result in primary succession.
Explanation:The question is asking which of the listed events would not lead to secondary succession. Secondary succession is a form of ecological succession that occurs in areas where an ecosystem was previously established but got disrupted. This disruption can be caused by several things, such as fires, floods, or human activities like logging.
Examples of secondary succession include a forest being regrown after a forest fire, or plant life returning to an area that has been logged. However, a volcanic eruption in the ocean would result in primary succession, not secondary. This is because primary succession occurs in a new habitat where no life existed before. In this case, plants and animals must begin life anew, starting from bare rock or ash, unlike secondary succession where there is already soil and often seeds waiting to germinate.
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The body felt cool to the touch. The thermometer gave a reading of 70˚F. No rigor mortis was evident, but permanent livor mortis had set in, with blood pooling along the back. There was no noticeable increase in bloating or bacterial activity in the digestive system and no putrefaction. The man had been dead for over four days. How is that possible?
Answer:
Basically enzyme activities are affected by drop in temperature. in additions the corpse was cool to touch.Therefore this explains while there was no bloating or bacteria activity since the decomposing bacteria enzymes were inactive because of the cold temperature.
Consequently, if the Livor mortis (lividity) is +8hrs 0-4days, evidently the corpse must have been refrigerated after livor mortis sets in, with the decomposition slowed down by the cold environment.
Notes: Algor mortis is 26.8hrs, and there was no algor mortis.
Explanation:
The body remains well-preserved for over four days due to extreme cold, which slows down decomposition processes. The observed lack of putrefaction and bacterial activity aligns with these environments.
Even though the body shows signs of being dead for a long time, the conditions probably stopped the normal progression of decomposition, as shown by the observations. The body can be preserved and activities like bloating, bacterial growth, and putrefaction halted by extreme cold, which can significantly slow down the decay process. Subsequently, the body's safeguarded state in spite of being dead for north of four days is possible because of it being in a climate with exceptionally low temperatures. This would guarantee the cool touch, nonattendance of swelling, and absence of rot even while super durable livor mortis was available. Outrageous virus keeps the body from disintegrating rapidly.Collecting proof like internal heat level and natural circumstances can assist with deciding season of death.What did Lamarcks and Darwin hypotheses about evolution have in common
Answer:
All animals came from a common ancestor.
Explanation:
Answer:
Explanation:
Species evolve in response to their surroundings. ... Darwin agreed that species do change and the changes are passed from one generation to the next.
According to the food web shown, if the Large Piscivorous Fish were to decrease drastically how would this affect the tertiary consumers?
A) The osprey population size would increase because the osprey can find another source of food quickly in the food web shown.
B) The bald eagle population size would decrease because the bald eagle relies solely on the piscivorous fish in the food web shown.
C) The osprey population size would decrease because the piscivorous fish is the only source of food for the osprey in the food web shown.
D) The bald eagle population size would stay constant because the bald eagle does not rely on the piscivorous fish in the food web shown.
Answer:
the ospery population size would increase because the ospery can find another source of food quickly in the food web shown
Evolution happened millions of years ago but is not happening now. true or false? If true give a reason why if false give a reason why
Answer:
false
Explanation:
Evolution is always occurring because even if one species isn't evolving into a new species, parts of the species is evolving. Such as a population of mice evolving their fur color to better blend in with their environment and avoided being seen by predators
3) Which of the Oceans is THE LARGEST?
4) Which of the Oceans is THE COLDEST?
5) Which of the Oceans is THE WARMEST?
6) Which of the Oceans is the DEEPEST?
7) Which civilization thought that a river ran around the edge of the world?
8) What is the name of the ancient supercontinent? the ancient super-ocean?
9) Where are the deepest points on Earth?
10) True or False? All of the oceans are linked together into one ocean.
11) What percentage of living space do the oceans make up?
12) What is the largest structure built by sea organisms?
13) What are the smallest type of organisms found in the ocean?
14) Which color travels the deepest in the ocean?
15) Who & When first proved that all of the Earth’s oceans were connected?
16) If all of the salt was extracted from ocean water and placed on land, how deep would it be?
17) Where is the saltiest sea?
18) Differences in the amount of ________ in water can cause underwater currents.
19) What object was used to chart the direction of surface currents?
20) What causes ocean surface currents to spin in the Northern Hemisphere?
21) What type of motion does an object floating in the ocean have?
22) How much of the water on Earth is locked up in ice?
23) How are the ocean depths measured today?
24) How much further does sound travel in water as opposed to air?
25) What area of the Atlantic is notorious for having strange things occur and instruments to malfunction?
Please need help this is a test
Answer:
3:The Pacific Ocean is the largest and deepest of the world ocean basins. Covering approximately 63 million square miles and containing more than half of the free water on Earth, the Pacific is by far the largest of the world's ocean basins. All of the world's continents could fit into the Pacific basin.Nov 2, 2019
4.The Arctic Ocean is the coldest ocean and has average temperatures of about 28 degrees Fahrenheit.
5: Although it might seem illogical, the Atlantic Ocean is warmer.
6:is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 36,200 feet deep.
7:
Explanation:
Answer:
1. Pacific Ocean
2. Arctic Ocean
3. Indian Ocean
4. Pacific Ocean
5. Greece
6. Pangaea
7. The challenger deep in the Mariana trench
8. True
9. 99%
10. The great barrier reef
11. Algae
12. Blue
13.James cook in 1770
14. 500 feet thick
15. The dead sea
16. Density
17. Bottles
18. Salt
19. The earth rotation
20. circle
21. 10%
22. Sonar
23. Five times
24. Bermuda triangle
All of the following are common endemic diseases, except __________.
A.
malaria
B.
typhoid
C.
smallpox
D.
tuberculosis
Please select the best answer from the choices provided.
A
B
C
D
Final answer:
Smallpox is the correct answer as it is not an endemic disease; it has been eradicated worldwide. Malaria, typhoid, and tuberculosis remain common endemic diseases in specific geographic areas.
Explanation:
All of the following are common endemic diseases, except smallpox. The correct answer is C. Smallpox.
Endemic diseases are those that are constantly present in a population within a particular geographic area. Malaria (A), typhoid (B), and tuberculosis (D) are all examples of endemic diseases. Malaria is often found in tropical climates and is transmitted by mosquitoes. Typhoid is a waterborne illness that remains a significant concern in areas with poor sanitation. Tuberculosis is a respiratory infection that is quite common in many parts of the world, particularly in urban areas with dense populations.
However, smallpox has been eradicated worldwide due to an effective global vaccination campaign. The last known natural case was in 1977, and it is no longer commonly found anywhere in the world, making smallpox the correct choice for the disease that is not endemic.
cloud formation is the direct result of what
evaporation,liquid water
evaporation.water vapor
condensation, liquid water
condensation. water vapor
12. If orange flower color in a plant is controlled by an allele F and red flower color is controlled
by an allele fwhich flower color is dominant?
Answer:
orange
Explanation:
The dominant flower color in this scenario is orange as it is represented by allele F. In genetics, uppercase letters denote dominant traits, while lowercase letters denote recessive traits.
Explanation:In genetics, dominant alleles are those which express their effect even if there is only one copy of the gene in the organism's genotype. According to the question, orange flower color is controlled by allele F and red by allele f. Generally, uppercase letters like F are used to denote dominant traits whereas lowercase letters like f are used to denote recessive traits. Therefore, in this scenario, the orange flower color is dominant.
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1. What is the main factor that separates freshwater and marine
ecosystems? *
Answer:
Ones has salt and the other doesn't
Explanation:
An important species of the Chesapeake Bay community is the Virginia oyster.
The larvae of these oysters settle on top of mature oysters, forming large oyster reefs. Oyster reefs allow small
fishes to avoid predators and provide shelter for a variety of marine invertebrates.
Which of the following best describes the role of Virginia oysters in the Chesapeake Bay?
Choose 1 answer:
An invasive species
A foundation species
A dominant species
A pioneer species
Answer:
Option B, Foundation species
Explanation:
Foundation species are the one that play a major role in creating and maintaining the habitat. These species support other species and can fit in at any trophic level of the food chain.
These species are also referred as ecosystem engineer as they contribute in designing the ecosystem.
Some examples of foundation species are - Corals, Earthworms, Beavers etc.
Hence, option B is correct
Answer:
Foundation species
did it on khan :)
Which of the following is something almost everyone can do to reduce his or
her carbon footprint?
O
A. Take warmer showers.
O
B. Use the fireplace when a house is cold.
O
C. Cook with the oven more often.
O
D. Turn off the lights when leaving the room.
The total emission of greenhouse gases like carbon dioxide and methane are called carbon footprint. It is caused due to human interference in nature.
The correct option is:
Option D. Turn off the lights when leaving the room.
This can be explained as:
Taking a warmer shower will not reduce greenhouse emissions rather will increase global warming as the water needs to heated by using some sources that will contribute to greenhouse gases.Using a fireplace emits carbon dioxide and monoxide that are more harmful to the environment.Using oven releases gases that contribute to the greenhouse effect.Therefore, turning the light off when not in use helps in reducing carbon footprint.
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Which of the following is a true statement about cellular respiration?
Group of answer choices
Cellular respiration occurs only in plant cells.
Cellular respiration occurs only in animal cells.
Cellular respiration occurs in both plant and animal cells.
Cellular respiration occurs in some plant cells and some animal cells.
Answer: C
Explanation:
Answer:
C
Explanation:
I took
IF ANYONE KNOWS THIS PLEASE HURRY AND HELP ME!!!!!
Heredity Lab Time to grab your virtual lab coat! In this lab, you will be investigating how hamsters inherit the traits for short or long fur. As you work through the lab, be sure to complete the Heredity Lab Report. You will submit your completed lab report for grading. Review the grading rubric before you begin.
Answer:
Hamster interit their traits based on their parents genes.
Explanation:
Hamsters do inherit their traits for long fur or short fur through the parents. The parents are what affects the offspring's traits, these are determined by the different genes. For example, if there is a recessive gene for short fur, then there will be less of a chance for the offspring to inherit short fur and vice versa. In some instances, there is a recessive gene and a dominant gene, in that case, the dominant gene will overpower the recessive gene hence it's name. There are three types of possible gene pairs, homozygous dominant: AA, homozygous recessive aa, and heterozygous dominant, Aa.If there is two of the recessive genes, then there is a higher chance for the short fur to appear in the offspring and etc.
Which of the following statements about natural killer cells is true?
SELECT ALL THAT APPLY
Group of answer choices
Natural killer cells are lymphocytes that function as part of the innate immune system.
Natural killer cells secrete toxins onto the surface of neoplasms.
Natural killer cells may bind to the Fc portion of antibodies thereby triggering ADCC.
Natural killer cells destroy virus infected cells.
Natural killer cells require activation by T helper cells, and are responsible for cell-mediated immunity
Answer:
Natural killer cells are lymphocytes that function as part of the innate immune system.
Natural killer cells destroy virus infected cells.
Explanation:
Natural killer cells is a type of white blood cells which is responsible for the protection of body against pathogens such as viruses and bacteria etc. Natural killer cells is a type of innate immune system which takes action immediately against viruses. Natural killer cells is not adaptive immune system, it is already present in the body of organisms. It is also considered as the first line of defense of the body against harmful microbes.
Please help I only have 12 minutes left and only got like 7 questions done
Answer:
I think that is the cortex
Explanation:
Answer:
frontal lobe
Explanation:
im in health academy in my school :)
A computer simulation showing models of planes crashing is a good way to study the effects of plane safety.why?
Answer:
Flight simulators are widely used for pilot training in the aviation industry, military pilot training, simulation of disasters or failures in flight, and aircraft development.
These simulations are used for pilot training, whose essential function is to train the crew in normal, abnormal and emergency procedures, before and during flight, practicing innumerable situations, such as: failures in electronic systems, loss of power, tailwinds and many others, which cannot be done safely with an aircraft in real situations. Explains to the new pilots the movements and attitudes of the ships, becoming a fundamental part of the training, saving lives and large economic losses.
These simulations allow knowing the causes of each plane crash in order to modify the operating procedures and training, so that its repetition is avoided. Flight safety investigations are complex and analyze numerous factors, and rather than investigating the persons responsible, it tries to find out the causes of the incident, considering human factors and technical issues.