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Unit 3 Assessment
Test Description: Human Body
Instructions: Answer all questions to get your test result.
1) What is a control group?
A
The part of the experiment that you change.
B
The part of the experiment that is used for comparison.
C
The part of the experiment that changes during the experiment; gather data.
D
The materials stay the same.
2) What is a dependent variable?
A
The part of the experiment that you change.
B
The materials stay the same.
C
The part of the experiment that changes during the experiment; gather data.
D
The part of the experiment that is used for comparison.
3) What is an independent variable?
A
The part of the experiment used for comparison.
B
The part of the experiement that changes during the experiement; gather data.
C
The materials stay the same.
D
The part of the experiment that you change.
4) What is the main function of the Digestive System?
A
Transport materials through the body.
B
Breaks down materials to absorb nutrients.
C
Take in oxygen and release carbon dioxide.
D
Eliminate waste from the body.
5) What is the main function of the Respiratory System?
A
Eliminate waste from the body.
B
Take in oxygen and release carbon dioxide.
C
Breaks down materials to absorb nutrients.
D
Transport materials through the body.
6) What is the main function of the Circulatory System?
A
Eliminate waste from the body.
B
Take in oxygen and release carbon dioxide.
C
Transport materials through the body.
D
Breaks down materials to absorb nutrients.
7) What is the main function of the Excretory System?
A
Transport materials through the body.
B
Eliminate waste from the body.
C
Take in oxygen and release carbon dioxide.
D
Breaks down materials to absorb nutrients.
8) In the lung model lab what happened when we replaced the wider straw with a straw that has a smaller opening?
A
More oxygen would be obtained, more carbon dioxide would be released
B
less oxygen would be obtained, less carbon dioxide would be released
C
Less oxygen would be obtained, more carbon dioxide would be released
D
More oxygen would be obtained, less carbon dioxide would be released
9) What organs are used in waste removal?
A
mouth. kidney, and gallbladder
B
lungs, skin, kidneys
C
esophagus, lungs and skin
D
lungs, gall bladder, and skin
10) THe hypothesis to a lab was that plants grow faster in green light. Students observed the plants and recorded their observations. They oberveed that there was no change in the plants. What is the dependent variable in the experiment?
A
type of plant
B
how fast the plant grows
C
color of light
D
size of pot
11) Scientists perform experiments to test hypotheses. How do scientists try to remain objective during experiments?
A
Scientists conduct experiments once.
B
Scientist change at least two variables.
C
Scientist analyze all data.
D
Scientist use safety precautions.
12) Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which systems work together to deliver more oxygen to these cells?
A
circulatory and respiratory
B
excretory and circulatory
C
digestive and circulatory
D
respiratory and excretory
13) The organs of the digestive system help organisms take in food and break it down for cels to use for energy, eliminate unused materials. Which if the following are three organs that effectively carry out the function of digestion in an organism?
A
pancreas, stomach, liver
B
gallbladder, large intestine, rectum
C
small intestine, mouth, stomach
D
large intesting, pancreas, esophagus
14) Which pathway does most oxygen take after breathing in?
A
Respiratory- body cells-circulatory
B
Respiratory-Circulatory- Cells
C
Circulatory- respiratory- body cells
D
Circulatory-body cells- respiratory
15) Why do scientists use multiple trials in an experiment?
A
Because they want to play with the materials.
B
To prove they are always right.
C
Because they were told to by the teacher.
D
To see that the results are consistent.
*select an answer for all questions
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