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Unit 1 Review
Test Description: Review for Unit 1
Instructions: Answer all questions to get your test result.
1) In a laboratory experiment, what is a “Control Group”?
A
The tested variable
B
The variable that you change
C
Things in the experiment that don’t change
D
The baseline
2) In a laboratory experiment, why is a hypothesis important even if it’s wrong?
A
Because it could lead you in a new direction.
B
Because it’s part of the experiment.
C
Because it’s just good science.
D
Because it tells you the correct answer.
3) What are the 2 main functions of the Digestive System?
A
Carrying oxygen and eliminating carbon dioxide
B
Generating energy and carrying nutrients
C
Absorbing water and eliminating waste
D
Eliminating Waste and Breaking Down Food
4) Which organ(s) are responsible for breaking down food?
A
Mouth and Stomach
B
Rectum and Pancreas
C
Esophagus and Liver
D
Small Intestine
5) Which organ(s) are responsible for absorbing nutrients from food?
A
Mouth and Stomach
B
Small Intestine
C
Esophagus and Liver
D
Rectum and Anus
6) What type of waste does the digestive system remove (choose the BEST answer)?
A
Gas
B
None of the above.
C
Solid
D
Liquid
7) When nutrients are absorbed in the digestive system, which system picks them up and carries them around the body?
A
Circulatory
B
Excretory
C
Respiratory
D
Nervous
8) What are the four main parts of the Circulatory System?
A
Brain, nerves, spinal cord, neurons
B
Lungs, Bronchi, Trachea, Larynx
C
Heart, Arteries, Veins, capillaries
D
Heart, lungs, brain, muscles
9) What are the main functions of the circulatory system?
A
To control your body’s response to stimuli
B
To absorb nutrients and eliminate waste
C
To carry oxygen and nutrients to your cells and carry carbon dioxide away
D
To bring in oxygen and remove carbon dioxide
10) What direction do arteries carry blood in relation to your heart? What direction do veins carry blood?
A
Away, towards
B
Away, away
C
Towards, away
D
Towards, towards
11) Which organs(s) are responsible for eliminating waste in the digestive system?
A
Rectum and Anus
B
Mouth and Stomach
C
Small Intestine
D
Esophagus and Liver
12) What does blood do while it is in capillaries?
A
Nothing
B
Change directions
C
Exchange materials (oxygen and carbon dioxide)
D
Move into the arteries
13) Why do the capillaries have such thin walls?
A
So the blood can slow down
B
To keep your blood pressure down
C
So that materials can easily pass through their walls
D
So the blood can move faster
14) What affect does exercise have on heart rate?
A
Exercise increases heart rate
B
Exercise decreases heart rate
C
Exercise has no effect on heart rate
D
It depends on the exercise
15) The circulatory system interacts with which other body system in the lungs?
A
Digestive
B
Respiratory
C
Excretory
D
Nervous
16) What is the main function of the respiratory system?
A
To bring in oxygen and remove carbon dioxide
B
To absorb nutrients from food
C
To control your body’s response to stimuli
D
To eliminate solid waste
17) What are the main organs of the respiratory system?
A
Brain
B
Heart
C
Kidneys
D
Lungs
18) What type of waste do the circulatory and respiratory systems eliminate?
A
Liquid
B
Gas
C
All of the above
D
Solid
19) What is the main function of the Nervous System?
A
To absorb nutrients from food
B
To eliminate solid waste
C
To bring in oxygen and remove carbon dioxide
D
To control your body’s response to stimuli
20) Why does your body react badly to smells you associate with negative memories?
A
To protect you from harm
B
To remind you of unpleasant things
C
To keep you from getting bored
D
To give you nightmares
*select an answer for all questions
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