Unit 3 Assessment Question Preview (ID: 28882)
Human Body.
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What is a control group?
a) The part of the experiment that is used for comparison.
b) The part of the experiment that you change.
c) The part of the experiment that changes during the experiment; gather data.
d) The materials stay the same.
What is a dependent variable?
a) The part of the experiment that is used for comparison.
b) The part of the experiment that you change.
c) The part of the experiment that changes during the experiment; gather data.
d) The materials stay the same.
What is an independent variable?
a) The part of the experiment used for comparison.
b) The part of the experiment that you change.
c) The part of the experiement that changes during the experiement; gather data.
d) The materials stay the same.
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.
What is the main function of the Respiratory 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.
What is the main function of the Circulatory 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.
What is the main function of the Excretory 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.
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
What organs are used in waste removal?
a) esophagus, lungs and skin
b) lungs, gall bladder, and skin
c) mouth. kidney, and gallbladder
d) lungs, skin, kidneys
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
Scientists perform experiments to test hypotheses. How do scientists try to remain objective during experiments?
a) Scientist use safety precautions.
b) Scientists conduct experiments once.
c) Scientist analyze all data.
d) Scientist change at least two variables.
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) digestive and circulatory
b) circulatory and respiratory
c) respiratory and excretory
d) excretory and circulatory
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) small intestine, mouth, stomach
b) gallbladder, large intestine, rectum
c) large intesting, pancreas, esophagus
d) pancreas, stomach, liver
Which pathway does most oxygen take after breathing in?
a) Respiratory-Circulatory- Cells
b) Circulatory-body cells- respiratory
c) Respiratory- body cells-circulatory
d) Circulatory- respiratory- body cells
Why do scientists use multiple trials in an experiment?
a) Because they want to play with the materials.
b) To see that the results are consistent.
c) Because they were told to by the teacher.
d) To prove they are always right.
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