5th Grade Science “Life on the Inside” Second Quarter
Answer Key- answers are in bold. Each multiple choice question is worth 1 point. Each short response is worth 2.
1. All animals and plants are made of (1pt)
a. Organs
b. Systems
c. Cells
d. Organism
2. Which of the following is not part of the digestive system? (1 pt)
a. Stomach
b. Intestines
c. Esophagus
d. Heart
3. Levels of organization: Which of the following shows the levels of organization in the human body from the
smallest to the largest? (1 pt)
a. Cells, tissues, organs, systems, organism
b. Tissues, cells, organism, systems, organs
c. Organism, organs, systems, cells, tissues
d. Systems, organs, cells, organism, tissues
4. Robert was sitting on the couch. He decided to go out and jump on his trampoline. Explain how the circulatory
and respiratory systems have changed by jumping on the trampoline. (5 pts)
Answer should include: Robert’s circulatory system will be working at a higher rate; his heart will be
pumping more blood, his breathing rate will be increased and there will a larger volume of O2/CO2
exchanged.
5. The heart, arteries and veins are all part of the what body system? (1 pt)
a. Circulatory
b. Respiratory
c. Muscular
d. Skeletal
6. Which of the following systems break food into nutrients that can used by the body? (1 pt)
a. Circulatory System
b. Respiratory System
c. Muscular System
d. Digestion System
7. Which of the following is a harmful waste material that leaves the blood and travels through the lungs before
leaving the body? (1 pt)
a. CO2 (Carbon Dioxide)
b. H2O (Water)
c. O2 (Oxygen)
d. NaCL (Sodium Chloride- or salt)
8. What are four characteristics of all living things? Circle to four correct items. (1 pt)
Growth Movement Smell Talking Reproduction
Eating
Jumping
9. Which list gives the correct order of food traveling through the digestive system after it is swallowed? (1 pt)
a. Stomach, esophagus, large intestine, small intestine
b. Esophagus, stomach, small intestine, large intestine
c. Large intestine, small intestine, esophagus, stomach
d. Small intestine, stomach, esophagus, stomach
10. Which pair of body systems is MOST responsible for support and movement? (1 pt)
a. Digestive and Circulatory
b. Muscular and Skeletal
c. Nervous and Excretory
d. Immune and Reproductive
11. The chart below shows the results of an experiment designed to study how exercise affects heart rate.
Activity Stage
Before exercise
After exercise
Heart Rate of Person
A (beats per minute)
75
120
Heart Rate of Person B
(beats per minute)
62
110
Heart Rate of Person C
(beats per minute)
70
130
Which of the following statements is the best conclusion for this experiment? (1 pt)
a. Exercise triples a person’s heart rate.
b. Exercise decreases a person’s heart rate.
c. Heart rate is not affected by exercise.
d. Heart rate is increased by exercise.
12. Pick two body systems and explain how they are connected. (answers will vary- but need to show a clear
connection between the two systems) (5 pts)
13. What is the main function of the respiratory system? (1 pt)
a.
b.
c.
d.
The lungs help move oxygen through the body.
The lungs warm and moisten the air.
The lungs help clean the air we breathe.
The lungs pull your rib cage up and out.
14. Write the letter on the line that matches the function to the body system. (6 pts- 1 each)
_F____Filters liquid wastes from the blood.
A. respiratory system
_D___Connects tissues and organs to the brain
B. muscular system
_A___Exchanges carbon dioxide for oxygen
C. skeletal system
_B___Contracts to move bones, blood, or food
D. nervous system
_C___Gives the body structure and protects organs
E. circulatory system
_E___Pumps blood to all parts of the body
F. excretory system
15. True or False: Chewing is part of digestion. Circle T for true; F for false. (1 pt)
16. A place where two bones meet is called (1 pt)
a. Meeting place
b. Ligament
c. Joint
d. Space
17. Which skeletal joint works like opening and closing a door? (1 pt)
a. Ball and socket joint
b. Slider
c. Hinge joint
d. Fixed joint
18. Muscles ____________ and relax. (1 pt)
a. Feel
b. Contract
c. Relax
d. Shake
e.
19. Label the four main parts of a green plant pictured below. (4 pts)
flower
leaf
stem
roots
20. A scientist named Joseph Priestly conducted an experiment in which he put a mouse in a bell jar. The mouse
soon died. He repeated this experiment by placing just a mint plant in the bell jar. The plant soon withered and
died. He then changed the experiment to add a mint plant along with the mouse in the bell jar. The mouse and
plant survived. Explain why these two organisms survived
together. (5 pts)
The mouse produced CO2 that the plant needed, and the
plant processed CO2 to make Oxygen that the mouse needed
to survive.