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The human skeleton Quiz for Grade 4

10 science questions on the human skeleton with answers, written for Grade 4. Use it as it is, change any question, print it with an answer key, or give it online and let it grade itself.

1.
What is the main function of the human skeleton? (Multiple choice)
  1. To help us breathe
  2. To pump blood
  3. To digest food
  4. To support and protect the body
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To support and protect the body

The skeleton supports the body and protects vital organs.
2.
Which bone is found in the arm? (Multiple choice)
  1. Skull
  2. Tibia
  3. Humerus
  4. Femur
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Humerus

The humerus is the upper arm bone.
3.
How many bones does an adult human skeleton have? (Multiple choice)
  1. 150
  2. 206
  3. 300
  4. 100
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206

An adult human has 206 bones in their skeleton.
4.
The skull protects the brain. (True or false)
  1. True
  2. False
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True

The skull surrounds and protects the brain.
5.
The ribs are part of the skeleton that protect the heart and lungs. (True or false)
  1. True
  2. False
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True

Ribs form a cage that protects the heart and lungs.
6.
Name the largest bone in the human body. (Identification)
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Femur

The femur is the longest and strongest bone.
7.
The _____ is the bone that protects your chest and connects to the ribs. (Fill in the blank)
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sternum

The sternum is the chest bone that ribs connect to.
8.
Which part of the skeleton helps you move? (Multiple choice)
  1. Teeth
  2. Joints
  3. Skull
  4. Ribs
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Joints

Joints allow bones to move and help us move.
9.
Match each bone with its location. (Matching type)
1. Femur
A. Chest
2. Humerus
B. Arm
3. Skull
C. Leg
4. Ribs
D. Head
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1 = Leg; 2 = Arm; 3 = Head; 4 = Chest

Each bone is located in a different part of the body.
10.
Give three functions of the human skeleton. (Enumeration)
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Support the body, Protect organs, Help movement

The skeleton supports, protects, and helps us move.