This Grade 3 science worksheet focuses on cause and effect between forces and motion. Students fill in nine short sentences covering balanced forces, unbalanced forces, doubling a push, and forces that cancel. A matching section then pairs four cause phrases with the correct motion outcomes. Examples use carts, boxes, swings, and ropes that Grade 3 students recognize. Vocabulary includes force, balanced, unbalanced, speed, direction, and cancel, supporting NGSS 3-PS2 investigations.
Style:
Forces and Motion
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A bigger push on a toy car makes it move with more speed.
2. Two friends pushing a box in the same direction make it move faster.
3. Two equal pushes in opposite directions cancel each other out.
4. If you double the push on a cart, its speed will double.
5. A push is one kind of force that can change motion.
6. When forces on an object are equal and opposite, we say they are balanced.
7. When the total force is not zero, we say the forces are unbalanced.
8. If two kids pull on a rope with equal force, the rope does not move.
9. Pushing a swing at just the right time makes it swing higher.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Two equal pushes in opposite directions
→ Forces cancel and the object does not move
Forces cancel and the object does not move
Two pushes in the same direction
→ Forces add and the object speeds up
Forces add and the object speeds up
Doubling the push on a cart
→ Speed about doubles
Speed about doubles
One strong pull with no other force
→ Unbalanced force makes the object move
Unbalanced force makes the object move
Forces and Motion
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) A bigger push on a toy car makes it move with more speed.
2) Two friends pushing a box in the same direction make it move faster.
3) Two equal pushes in opposite directions cancel each other out.
4) If you double the push on a cart, its speed will double.
5) A push is one kind of force that can change motion.
6) When forces on an object are equal and opposite, we say they are balanced.
7) When the total force is not zero, we say the forces are unbalanced.
8) If two kids pull on a rope with equal force, the rope does not move.
9) Pushing a swing at just the right time makes it swing higher.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Two equal pushes in opposite directions
→ Forces cancel and the object does not move
Forces cancel and the object does not move
Two pushes in the same direction
→ Forces add and the object speeds up
Forces add and the object speeds up
Doubling the push on a cart
→ Speed about doubles
Speed about doubles
One strong pull with no other force
→ Unbalanced force makes the object move
Unbalanced force makes the object move
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10 Questions
10-15 minutes
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