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Experimental Design Practice Peat Moss Scenario (HURRY)
Norm wanted to know if adding peat moss to sand would affect its ability to hold water. He put 200 mL of pure sand into container A. He put a mixture of 80% sand and 20% peat moss into container B. He put a mixture of 60% sand and 40% peat moss into container C. He put a mixture of 40% sand and 60% peat moss into container D. He added water to each container and measured the amount of water the contents would absorb. He dried the sand and peat moss and repeated the experiment 5 times. He collected the following data
(attached the table)
For each of the above scenarios, answer the following questions:
1. What is the Independent and Dependent variable for each scenario?
The dependent variable is the variable that measured / tested in an experiment. For example, in a study how tutoring impacts test scores, the dependent variable is the participants' test scores, because that is what is being measured. Whereas an independent variable is a variable that stands alone and isn't changed by the other variables that we are trying to measure. For example, someone's age might be an independent variable. Therefore the Independent variable and Dependent variable for each scenario is water and drying and container (the Independent variable), also pure sand, peat moss (Dependent variable)
2. What variables were held Constant for each scenario?
water and drying and container
3. What is the Control group for each scenario?
dried and repeated the experiment 5 times, amount of pure sand and peat moss
4. Write a hypothesis for each scenario.
He put 200 mL of pure sand into container A. => not adding peat moss to sand not would affect its ability to hold water. (containers are not heavy to move)
He put a mixture of 80% sand and 20% peat moss into container B. => adding peat moss to sand would affect its ability to hold water (containers too heavy to move)
He put a mixture of 60% sand and 40% peat moss into container C. => adding peat moss to sand would affect its ability to hold water. (containers little heavy to move)
He put a mixture of 40% sand and 60% peat moss into container D. => adding peat moss to sand would affect its ability to hold water. (containers less heavy to move)
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Related Questions
How many calories are provided by a food that contains 20 grams of carbohydrate, 8 grams protein, and 5 grams of fat?
a. 232
b. 378
c. 157
d. 258
e. 558?
Answers
Every gram of protein also yields 4 Calories.
Every gram of fat yields 9 Calories.
20 g carb x 4 = 80 Cal
8 g protein x 4= 32 Cal
5 g fat x 9 = 45 Cal.
80+32+45 = 157 Calories. Answer C
Calories are used in defining the unit of the food that gives energy to the body. Food containing 8 grams of protein, 20 grams of carbohydrate, and 5 grams of fat provides 157 Calories. Thus, option c is correct.
What are calories?Calories are defined as the energy provided by the various molecules for the food that needs to be maintained so as not to get obese or underweight. Food containing carbohydrates, fats, and proteins is used to evaluate the calories.
The calories for the food containing this organic molecule are calculated as:
C= 4 carbohydrates + 9 fats + 4 proteins
Given,
Carbohydrate = 20 gm
Fats = 5 grams
Proteins = 8 grams
Substituting the values above as:
Calories = (20) × 4 + (5) × 9 + 4 × (8)
= 80 + 45 + 32
= 157 calories
Therefore, option c. 157 calories are present in the given food.
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What are the two major misuses of resources geographers observe?
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The two major misuses of resources observed by geographers are the depletion of nonrenewable resources and the destruction of otherwise renewable resources by pollution.
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Which is true about all unicellular and multicellular organisms?
•They are made of one cell
• They reproduce
• They cause infections
• They are made of multiple cells
Answers
Answer:
they both reproduce
Explanation:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions.
Marfan's syndrome is a disease associated with faulty manufacture of the extracellular protein fibrillin. since this is a component of elastic fibers, in which of the numbered cells would the damaged gene be expressed?
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The most abundant organ would be skin, bones, and joints. Marfan syndrome will give prominent symptoms as strecth marks in skin, long and thin bone(arms, leg, fingers), lens of the eye, and shape of the chest.
Which layer of soil is least likely to be penetrated by plant roots? a. O (organic matter) b. A (topsoil) c. B (subsoil) d. C (parent rock)
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Answer: d. C (parent rock)
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The layer or soil horizon, which is least likely to be penetrated by plant roots is C horizon. The C horizon is a layer of soil, which consists of huge aggregates of parent rocks, which are unweathered or partially weathered, lying deep in the bottom of the soil profile. It does not contain organic matter. Also, the texture of the soil is not fine, instead hard rocks are present. Therefore, this layer of soil cannot be penetrated by plant roots.
Justify why the predator/prey relationship is a community level interaction.
Answers
Answer:
It is an interaction between two different species, so the organism, species and population levels are too low.
Explanation:
In preparing a slide what step ensures that the cells adhere to the slide?
Answers
How might it benefit an organism to have the nucleus near the centre of its cells?
Answers
Just the cells of cutting edge organisms, known as eukaryotes, have a core. For the most part, there is just a single core for every cell, except there are special cases, for example, the cells of ooze molds and the Siphonales gathering of green growth. More straightforward one-celled organisms, similar to the microbes and cyanobacteria, don't have a core.
Answer:
For protection and better control.
Explanation:
First of all, if the nucleus was located in the periphery it would be easier for physical damage to reach it, but also for viruses or so, even with the use of vectors. Then, being in the center makes it equally easier to send signals, orders or RNA to each part of the cell.
In what form does the human body store excess sugar? In what form do plants store excess sugar?
I AM SO CONFUSED...HELP?
Answers
The human body stores excess sugar as glycogen, mostly in the liver and muscles. On the other hand, plants retain their excess sugars as starch in specific organs like tubers or bulbs.
Explanation:The human body and plants have a unique way of managing excess sugar, which is useful for future energy needs. In humans, the body stores excess sugar in the form of glycogen.
This process occurs within the liver and muscles. Conversely, in plants, sugar is stored as starch.
This starch is often held within special organs like tubers or bulbs and can be converted back into sugar when the plant needs energy.
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PLz help me with this question!!!!!
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Answer:
asexual reproduction
Explanation:
it starts off with a single nucleus and ends up with 2, there is no obvious chromosomes or spindle fibres to suggest meiosis or mitosis
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Answers
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Two positively charged particles attract each other
A positively charged particle and a negatively charged particle attract each other
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Two negatively charged particles attract each other
Answers
Charges of the same sign repel each other
so statement 2 and 4 is true.
Answer:
Charges of opposite sign attract one another
Charges of the same sign repel each other
so statement A positively charged particle and a negatively charged particle attract each other ,and Two negatively charged particles attract each other is the correct answer.
Explanation:
Hope it will help if not I only can say sorry
The odor from a hospitalized client's draining wound permeates the room and is very overwhelming and distracting to the client and the staff. what intervention would be most helpful?
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In giraffes, long necks (n), long legs (l), dark spots (d), and the ability to digest maize (m) are all dominant traits. what possible genotype could a long-necked, short-legged, light-spotted, maize-digesting giraffe have?
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Dr. mitchell is a scientist studying heredity. she wants to isolate the basic unit for the transmission of heredity, which is a(n) _____.
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Sensory impulses from the lungs are carried to the respiratory center by the
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In terms of biological function or process, what do the solid arrows shown in Model 2A represent?
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The solid arrows represent neuronal communication. The stimulus, the effects, and the flow of information is all done by receptors and synapses that send a signals across the body in order to have effective feedback responses promoting the homeostasis of the organism.
Solid arrows in the models typically represent direct interactions or processes such as regulatory activations, substrate binding, electron movement, and carbon fluxes in biological systems. They indicate the direction of process flow and are used to depict regulatory networks, biochemical reactions, and synthetic pathways.
In terms of biological function or process, the solid arrows shown in different models represent various types of interactions and processes. Direct interactions such as regulatory steps, substrate binding, or energy changes are examples of these functions. The solid arrows often indicate the direction of process flow, such as activation in regulatory networks, electron movement in biochemical reactions, substrate or ion transport across a membrane, natural carbon fluxes in ecosystems, or direction of chemical and biological pathways for synthesizing macronutrients. Positive interactions or activations are typically indicated by an arrow pointing from the activator to the target, as seen in signal transduction pathways.
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Why are pure democracies prone to the problem of faction?
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A patient with ___________ may appear to be in respiratory arrest, even though he or she is breathing.
a. a massive stroke
b. vomitus in the mouth
c. hypothermia
d. severe blood loss
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Hypothermia occurs when a body loses heat faster than it can produce heat. It usually occurs in a cold that results in lowering the body temperature.
Which lobe or cortex is farthest from the cerebellum?
a. frontal
b. parietal
c. occipital
d. temporal?
Answers
Final answer:
The frontal lobe, located at the front of the brain, is the cerebral cortex furthest from the cerebellum.
Explanation:
To determine which lobe or cortex is farthest from the cerebellum, it is important to understand the location of each lobe of the cerebral cortex. The cerebellum is located beneath the occipital lobe, towards the back of the brain. Considering the position of each lobe, the frontal lobe is located in the forward part of the brain and is the farthest lobe from the cerebellum. Therefore, the correct answer is a. frontal.
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N the six steps of the classic scientific method created by galileo and bacon the 5th step is
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2) Research the problem
3) Formulate a hypothesis
4) Test the hypothesis
5) Formulate a theory
6) Communicate the results
Gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant. why is the hybrid plant sterile
Answers
The hybrid plant is sterile due to its haploid nature, as it possesses only a single set of chromosomes. This prevents it from undergoing regular meiosis and producing viable gametes, resulting in sterility.
Explanation:The hybrid plant is sterile because it is haploid, meaning it has only one set of chromosomes. As a result, it is unable to undergo regular meiosis to produce viable gametes. During meiosis, chromosomes pair up and exchange genetic material. However, in a haploid plant, there are no pairs of chromosomes to engage in this process. Due to the lack of chromosomal pairs and thus a lack of genetic diversity in the gametes, the hybrid plant is sterile.
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The sterility of a hybrid plant resulting from the combination of gametes from two different plant species is often attributed to a phenomenon known as hybrid sterility or gametic incompatibility.
Chromosome Number Incompatibility: Different plant species may have different numbers of chromosomes or different arrangements of genes on their chromosomes.
When gametes from two different species combine during fertilization, the resulting zygote may have an abnormal chromosome number or structure, leading to problems in meiosis during subsequent cell divisions.
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These irregularities can lead to the production of aneuploid cells (cells with an abnormal number of chromosomes) in the hybrid plant.
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Complete question is:
Gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant. why is the hybrid plant sterile ?
Name the three major parts of the axial skeleton
Answers
1. skull
2. vertebral column
3. thorax
Which of the following statements are true about common ancestors? Check all of the boxes that apply.
A common ancestor exists when two species are derived from the same ancestral species.
Common ancestors only exist within a single species.
When two organisms share a common ancestor it means that they are related to some degree.
The more common ancestors two species share, the more closely they are related. Common ancestors show evidence for evolution because they show that all life is related.
Answers
Answer:
-A common ancestor exists when two species are derived from the same ancestral species.
-When two organisms share a common ancestor it means that they are related to some degree.
-The more common ancestors two species share, the more closely they are related.
-Common ancestors show evidence for evolution because they show that all life is related.
Explanation:
The theory of evolution is currently the basis of biology. According to Darwinian theory, living beings have their origin in a common ancestor, and over time and through natural selection they were transformed and evolved into new types of species. Defined evolution as the process by which organisms are transformed over generations, characterized as a complex process, since an ancestor can be many descendants.
We have that the appropriate selections are
A common ancestor exists when two species are derived from the same ancestral species.
When two organisms share a common ancestor it means that they are related to some degree. The more common ancestors two species share, the more closely they are related. Common ancestors show evidence for evolution because they show that all life is related.Option A,C,D,E
Animal species
Generally living beings mutate over time and with the aid of natural selection the form new species
A common ancestor exists when two species are derived from the same ancestral species. When two organisms share a common ancestor it means that they are related to some degree. The more common ancestors two species share, the more closely they are related. Common ancestors show evidence for evolution because they show that all life is related.Option A,C,D,E
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a. to carry out the genetic instructions for protein synthesis, and replicate itself before cell division.
b. to carry out the orders for protein synthesis issued by rna, and to control genetic expression by shutting down genes or altering their expression.
c. to carry out and direct instructions for protein synthesis.
d. to direct protein synthesis, and replicate itself before cell division?
Answers
During cell division, DNA will split so the Children could obtain half of their fathers DNA and half of their mother's DNA
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One way of tranquilizers to diminish anxiety symptoms is by having to stimulate the receptor sites for the GABA or also known as the gamma amino butyric acid. By stimulating this, it will allow the neuronal activity to drive down.