Forces and Motion — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
When you kick a ball, you pull it forward.
Corrected: When you kick a ball, you push it forward.
Grade 3 students learn a kick applies a push, which moves an object away from the source of the force.
2. Fix the sentence:
Opening a drawer is a push force.
Corrected: Opening a drawer is a pull force.
Pulling moves an object closer to you, which matches opening a drawer in Grade 3 Science.
3. Fix the sentence:
Gravity pushes apples up into the sky.
Corrected: Gravity pulls apples down toward the ground.
Grade 3 learners know gravity is a pull force that tugs objects toward Earth's center.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Kicking a soccer ball is an example of a push force.
In Grade 3 Science, a push moves objects away from the person or thing applying the force.
2. Opening a dresser drawer uses a pull force.
Grade 3 students learn a pull brings an object closer to the source of the force.
3. Gravity is a force that pulls objects toward Earth.
Gravity pulls everything on Earth downward, a key idea in Grade 3 NGSS 3-PS2.
4. Wind blowing leaves across the yard is a push force.
Grade 3 learners recognize that moving air pushes objects in the direction it travels.
Part C: True or False?
Read each statement. Circle True or False.
1. A push moves an object away from the force in Grade 3 Science.
True False
Grade 3 Science defines a push as a force that moves an object away from the source.
2. Gravity pushes objects up into the sky in Grade 3 lessons.
True False
Gravity is a pull force toward Earth; Grade 3 students see this when objects fall down.
3. Wind can push leaves and paper across the ground in Grade 3 Science.
True False
Grade 3 learners observe wind as a push force that moves lightweight objects.