Scientific experiments are specially designed to evaluate explanations for an observed phenomenon. A student decides to conduct an experiment to determine the effect that the amount of time spent in sunlight has on the overall growth of a plant. The student will carry out the experiment using two identical plants that will only spend different amounts of time in sunlight. All other aspects necessary for growth will remain identical for each. In the experiment described, what would be the amount of water given to each plant?
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Answer:
This question lacks options, the options are:
a. an observation
b. a dependent variable
c. an independent variable
d. a control
The answer is D. Control
Explanation:
According to the question, a student decides to conduct an experiment to determine the effect that the amount of time spent in sunlight has on the overall growth of a plant. The student keeps all other variables needed for the plants' growth in this experiment the same/identical. These variables kept identical by the student is called CONTROL OR CONSTANT.
One of the CONTROL is the amount of water given to each plant. The amount of water given to the two plants being tested must be the same. Hence, WATER in this experiment is a CONTROL VARIABLE.
Note that, the independent/manipulable variable is the amount of time spent in sunlight while the dependent/measurable variable is the growth of the plants.
Answer:
The answer is D control
Explanation:
Related Questions
Abdid is an astronomer who has been observing objects that orbit the Sun in the asteroid belt. He finds a previously undiscovered round, rocky object that is not similar in shape to the rest of the asteroids. What has Abdid most likely found?
Two liquids mix, neither absorbing nor releasing heat.
What is the half-life of sodium-25 if 1.00 gram of a 16.00-gram sample of sodium-25 remains unchanged after 237 seconds?(1) 47.4 s (3) 79.0 s(2) 59.3 s (4) 118 s
A.) Thermal Decomposition of 2.765 g NaHCO3 yields 1.234g of a solid Na2CO3 . Calculate the theoreticial yield and percent yield of Na2CO3.B) Thermal decomposition of 2.968 g of a mixture containing NaHCO3 lost 0.453 g . Calculate the percentage of NaHCO3 in this unknown mixture
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moles of H+ = 0.5 M * 0.025 L HCl = 0.0125 moles H+
moles of OH- should be equal to 0.0125 moles, so
0.0125 moles = (x) * 0.025 L NaOH
x is the concentration of NaOH, which we want to find.
x = 0.5 M
The correct answer is C) 0.5 M.
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This element must be xenon.
Final answer:
The number of moles is 1.49 and the molar mass is 176.124 g/mol.
Explanation:
To determine the number of moles, we can use the formula:
moles = mass / molar mass
Given that the mass of the gas is 262g and the molar mass is 176.124 g/mol, we can substitute these values into the formula:
moles = 262g / 176.124 g/mol = 1.49 moles (rounded to two decimal places).
Therefore, the number of moles is 1.49. The molar mass of the compound is 176.124 g/mol. In order to determine what element this is, we would need more information about the compound.
Learn more about molar mass here:
#SPJ2
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Student Name
Instructor
Date
Lab Objectives
In this lab you will:
• help the aliens, called Tinyians, build the best house on their planet called Tiny World.
• experiment with different building materials to collect data to see which ones best meet the criteria for building a home on Tiny World.
• test each building material for density, thermal and electrical conductivity, flexibility, and magnetism.
Background Research:
You will need to gather background research from the virtual lab to form a good hypothesis. Read the Welcome to Tiny World part of the lab. Use the background information you learn to answer the questions below.
Describe the gravity of Tiny World.
Part 1:
Describe the reason your house will need magnets.
Describe the climate of Tiny World.
Hypothesis:
In this section, include the IF/THEN statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
A If we use _______ to build the roof of the house, then the temperature inside the house will remain cooler.
B If we use_______ to build the walls and floors of the house, then the temperature inside the house will remain cooler.
C If we use ______ to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.
D If we use_______ to construct the latches on the windows and doors, then the magnetism will keep the latches secure.
Part 2
Procedure:
1. You will test each building material for density, thermal and electrical conductivity, flexibility, and magnetism.
2. Record your observations in the data table provided below.
3. Repeat steps with all test materials.
Data:
Record the results of each of your physical property tests in the table below.
Wood Clay Brick Iron Aluminum Copper Nickel
Flexibility
(?/10)
Magnetism
(number of paper clips)
Thermal Conductivity
(W/(m·K))
Electrical Conductivity
(x107 S/m)
Mass (g) 10g 10g 10g 10g 10g 10g
Volume (cm3)
Formula:
L x W x H
Density
(g/cm3)
Formula:
D=M/V
part 3
Conclusion
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
1 Using two to three sentences, summarize what you investigated and observed in this lab.
2 What was the independent variable in the lab?
3 What was the dependent variable in the lab?
4 Did each of your experiment results support, or fail to support your four hypotheses? A.
B
C.
D.
5 Why do you think a building material's density is important when building homes or architectural structures?
6 Why wouldn’t you choose wood or aluminum for the latches on your house?
7 Which material has the highest thermal conductivity?
8 Which material has the highest electrical conductivity
9 Based on your data, explain why these materials have the highest thermal and electrical conductivity?
10 Think about where you live now or where you have lived in the past; use complete sentences to describe this environment and the weather.
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Answer:
The purpose of the "Measuring Physical Properties Lab Report" is to test the physical properties of different building materials in order to choose the most suitable materials for a new home in Tiny World. The lab objectives include helping the Tinyians build their best house, experimenting with different materials to collect data, and testing each material for density, thermal and electrical conductivity, flexibility, and magnetism.
The background research will provide information about Tiny World, including its gravity, climate, and other relevant details. The hypothesis section requires you to make IF/THEN statements based on the lab activity. For example, IF we use a certain material for the roof, THEN the temperature inside the house will remain cooler.
In part 2, the procedure involves testing each building material for density, thermal and electrical conductivity, flexibility, and magnetism. You need to record your observations in the data table provided.
In part 3, the conclusion should summarize the lab results and provide an interpretation of the results. It also includes answering questions about the independent and dependent variables in the lab, whether the experiment results support or fail to support the hypotheses, and explanations about the importance of density in building materials, why wood or aluminum wouldn't be suitable for latches, and which materials have the highest thermal and electrical conductivity.
Finally, you are asked to describe the environment and weather of a place you have lived in the past or currently live in, using complete sentences.
Hope this helps :)
Explanation:
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