Class 3 Science Our Body Systems Worksheet 2

Class 3 Science Our Body Systems Worksheet 2

 

Fill in the Blanks (20 Questions)

 

1. The human body has __________ major organ systems.
2. The skeletal system is made up of a __________ of bones.
3. Without the skeleton, the body would be a __________ of flesh.
4. The skeletal system gives __________ to the body.
5. The bones with the help of __________ help the body to move.
6. A human baby is born with __________ bones in its body.
7. An adult has only __________ bones.
8. The nervous system comprises the brain, the __________ and the nerve cells.
9. All our functions are controlled by the __________ through the nerves.
10. Nerves carry messages from different parts of the body to the __________ and from the brain to different parts of the body.
11. The main organs of the excretory system are the __________.
12. The kidneys clean the blood by removing the __________ from it.
13. The waste is passed out of the body as __________.
14. The __________ and skin also help in excretion.
15. Extra water and salt are removed by the lungs in the form of __________.
16. The skeletal system protects all the __________ organs of the body.
17. Nerves are like __________ carrying messages throughout the body.
18. In the course of just one day, blood will pass through your kidneys at an average of __________ times.
19. The excretory system helps our body to get rid of __________.
20. We are able to write, read, talk and remember because of our __________ system.

 

 

Multiple Choice Questions (20 Questions)

 

How many major organ systems does the human body have?

1. a) 8
2. b) 10
3. c) 12
4. d) 15

 

 

What is the skeletal system made up of?

1. a) Muscles
2. b) A framework of bones
3. c) Nerves
4. d) Blood vessels

 

 

How many bones does a human baby have at birth?

1. a) 206
2. b) 250
3. c) 300
4. d) 350

 

 

How many bones does an adult have?

1. a) 300
2. b) 250
3. c) 206
4. d) 180

 

 

Which system gives shape to the body?

1. a) Digestive system
2. b) Skeletal system
3. c) Respiratory system
4. d) Circulatory system

 

 

What controls all our functions through the nerves?

1. a) Heart
2. b) Lungs
3. c) Brain
4. d) Kidneys

 

 

What are the main components of the nervous system?

1. a) Brain, heart, and lungs
2. b) Brain, spinal cord, and nerve cells
3. c) Bones, muscles, and joints
4. d) Kidneys, liver, and stomach

 

 

What is the main function of nerves?

1. a) To pump blood
2. b) To digest food
3. c) To carry messages
4. d) To produce energy

 

 

What are the main organs of the excretory system?

1. a) Lungs
2. b) Heart
3. c) Kidneys
4. d) Brain

 

 

What do the kidneys do?

1. a) Pump blood
2. b) Clean blood by removing waste
3. c) Digest food
4. d) Control movement

 

 

In what form is waste passed out of the body from the kidneys?

1. a) Sweat
2. b) Carbon dioxide
3. c) Urine
4. d) Saliva

 

 

Which organs also help in excretion besides the kidneys?

1. a) Brain and heart
2. b) Lungs and skin
3. c) Stomach and liver
4. d) Eyes and ears

 

 

How is extra water and salt removed by the lungs?

1. a) As urine
2. b) As tears
3. c) As sweat
4. d) Through breathing

 

 

What would happen to the body without the skeleton?

1. a) It would be very strong
2. b) It would be a mass of flesh
3. c) It would fly
4. d) Nothing would change

 

 

How many times does blood pass through the kidneys in one day?

1. a) 100 times
2. b) 200 times
3. c) 300 times
4. d) 500 times

 

 

What helps bones to move the body?

1. a) Nerves
2. b) Blood
3. c) Muscles
4. d) Skin

 

 

Which system protects all the internal organs of the body?

1. a) Digestive system
2. b) Skeletal system
3. c) Respiratory system
4. d) Excretory system

 

 

What makes us able to write, read, talk and remember?

1. a) Skeletal system
2. b) Digestive system
3. c) Nervous system
4. d) Circulatory system

 

 

Why do many bones in a baby join together as they grow?

1. a) To make the body heavier
2. b) To make a single bone
3. c) To create more space
4. d) To improve digestion

 

 

What is excretion?

1. a) Breathing in air
2. b) Removing waste from the body
3. c) Digesting food
4. d) Growing taller

 

True or False (20 Questions)

1. The human body has 12 major organ systems. __________
2. The skeletal system is made up of a framework of bones. __________
3. Without the skeleton, the body would be very strong. __________
4. The skeletal system gives shape to the body. __________
5. The skeletal system protects all the internal organs of the body. __________
6. The bones alone help the body to move without muscles. __________
7. A human baby is born with 300 bones in its body. __________
8. An adult has 300 bones in their body. __________
9. The nervous system comprises only the brain. __________
10. All our functions are controlled by the heart through the nerves. __________
11. Nerves carry messages from different parts of the body to the brain. __________
12. Nerves are like messengers in the body. __________
13. The main organs of the excretory system are the lungs. __________
14. The kidneys clean the blood by removing waste from it. __________
15. Waste is passed out of the body as sweat only. __________
16. The lungs and skin also help in excretion. __________
17. Extra water and salt are removed by the lungs in the form of sweat. __________
18. Blood passes through the kidneys at an average of 300 times in one day. __________
19. The excretory system helps our body to get rid of useful nutrients. __________
20. The skeletal system doesn’t allow the body to move. __________

 

Class 3 Science Our Body Systems Worksheet 2 Answer Key

 

Fill in the Blanks Answers:

1. 10 (ten)
2. framework
3. mass
4. shape
5. muscles
6. 300 (three hundred)
7. 206 (two hundred and six)
8. spinal cord
9. brain
10. brain
11. kidneys
12. waste
13. urine
14. lungs
15. sweat
16. internal
17. messengers
18. 300 (three hundred)
19. waste
20. nervous

 

MCQ Answers:

 

1. b) 10
2. b) A framework of bones
3. c) 300
4. c) 206
5. b) Skeletal system
6. c) Brain
7. b) Brain, spinal cord, and nerve cells
8. c) To carry messages
9. c) Kidneys
10. b) Clean blood by removing waste
11. c) Urine
12. b) Lungs and skin
13. d) Through breathing
14. b) It would be a mass of flesh
15. c) 300 times
16. c) Muscles
17. b) Skeletal system
18. c) Nervous system
19. b) To make a single bone
20. b) Removing waste from the body

 

True or False Answers:

1. False (10 major systems)
2. True
3. False (would be a mass of flesh)
4. True
5. True
6. False (bones need muscles to help move)
7. True
8. False (206 bones)
9. False (includes spinal cord and nerve cells)
10. False (controlled by brain)
11. True
12. True
13. False (kidneys are main organs)
14. True
15. False (passed out as urine)
16. True
17. False (sweat is removed through skin)
18. True
19. False (gets rid of waste)
20. False (skeletal system helps body move)