Have you ever wondered why a screwdriver isn't a wedge, or what really makes a slide work? In this set, third graders fix mixed-up sentences (like a nail being called a screw when it's actually a wedge), fill in blanks about ramps, axles, and crowbar levers, and decide whether tricky pulley and screw statements are true or false.
By the end, you'll be able to spot the six simple machines hiding in everyday objects and explain how each one changes the force you need to do a job.
Style:
Simple Machines
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A screwdriver is an example of a wedge.
Rewrite: A screwdriver is an example of a wheel and axle.
2. Fix the sentence:
A slide on the playground is a type of lever.
Rewrite: A slide on the playground is a type of inclined plane.
3. Fix the sentence:
A nail is a type of screw because it holds wood together.
Rewrite: A nail is a type of wedge because it holds wood together.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A screw wraps around a rod in a spiral shape to hold things together.
2. A longer ramp needs less force to push something to the top.
3. A bicycle wheel spins around a metal bar called an axle.
4. A crowbar pries things open because it works as a lever.
Part C: True or False?
Read each statement. Circle True or False.
1. A wedge has two slanted sides that meet at a sharp edge.
True False
2. A longer screw holds tighter than a shorter screw with the same width.
True False
3. A pulley can only push objects downward, never lift them up.
True False
Simple Machines
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
A screwdriver is an example of a wedge.
Rewrite: A screwdriver is an example of a wheel and axle.
2) Fix the sentence:
A slide on the playground is a type of lever.
Rewrite: A slide on the playground is a type of inclined plane.
3) Fix the sentence:
A nail is a type of screw because it holds wood together.
Rewrite: A nail is a type of wedge because it holds wood together.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A screw wraps around a rod in a spiral shape to hold things together.
2) A longer ramp needs less force to push something to the top.
3) A bicycle wheel spins around a metal bar called an axle.
4) A crowbar pries things open because it works as a lever.
★ Part C: True or False?
Read each statement. Circle True or False.
1) A wedge has two slanted sides that meet at a sharp edge.
True
False
2) A longer screw holds tighter than a shorter screw with the same width.
True
False
3) A pulley can only push objects downward, never lift them up.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
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