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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 materials stay the same.
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 part of the experiment that you change.
2) What is a dependent variable?
A
The materials stay the same.
B
The part of the experiment that is used for comparison.
C
The part of the experiment that you change.
D
The part of the experiment that changes during the experiment; gather data.
3) What is an independent variable?
A
The materials stay the same.
B
The part of the experiement that changes during the experiement; gather data.
C
The part of the experiment that you change.
D
The part of the experiment used for comparison.
4) What is the main function of the Digestive System?
A
Transport materials through the body.
B
Take in oxygen and release carbon dioxide.
C
Eliminate waste from the body.
D
Breaks down materials to absorb nutrients.
5) What is the main function of the Respiratory System?
A
Take in oxygen and release carbon dioxide.
B
Eliminate waste from the body.
C
Transport materials through the body.
D
Breaks down materials to absorb nutrients.
6) What is the main function of the Circulatory System?
A
Transport materials through the body.
B
Take in oxygen and release carbon dioxide.
C
Eliminate waste from 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
Take in oxygen and release carbon dioxide.
C
Eliminate waste from the body.
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, less carbon dioxide would be released
B
More oxygen would be obtained, more carbon dioxide would be released
C
less oxygen would be obtained, less carbon dioxide would be released
D
Less oxygen would be obtained, more carbon dioxide would be released
9) What organs are used in waste removal?
A
lungs, gall bladder, and skin
B
esophagus, lungs and skin
C
mouth. kidney, and gallbladder
D
lungs, skin, kidneys
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
size of pot
C
color of light
D
how fast the plant grows
11) Scientists perform experiments to test hypotheses. How do scientists try to remain objective during experiments?
A
Scientist analyze all data.
B
Scientists conduct experiments once.
C
Scientist change at least two variables.
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
excretory and circulatory
B
circulatory and respiratory
C
respiratory and excretory
D
digestive and circulatory
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
large intesting, pancreas, esophagus
B
small intestine, mouth, stomach
C
pancreas, stomach, liver
D
gallbladder, large intestine, rectum
14) Which pathway does most oxygen take after breathing in?
A
Respiratory- body cells-circulatory
B
Circulatory- respiratory- body cells
C
Circulatory-body cells- respiratory
D
Respiratory-Circulatory- Cells
15) Why do scientists use multiple trials in an experiment?
A
To see that the results are consistent.
B
To prove they are always right.
C
Because they were told to by the teacher.
D
Because they want to play with the materials.
*select an answer for all questions
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