Science Progress Check

A thing or situation that needs to be solved is a ________________.

• solution

• goal

• problem

• property

An engineer´s or inventor´s ____________ is to find the best solution to a problem.

• goal

• property

• solution

• material

You are designing a new pair of sports shoes. What material could you pick to make them?

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• 
• 
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In the design process, when scientists ____________, they evaluate if the product really works.

• brainstorm

• improve

• test

• plan

When inventors or scientists _____________ an object, they make adjustments to make it better.

• build

• draw and plan

• identify a problem

• improve

Pick the picture that shows a tool.

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• 
• 
• 

Machines can be ______________ and ____________.

What simple machine is this?

• lever

• pulley

• ramp

• screw

What kind of simple machine is this?

• pulley

• wheel and axle

• wedge

• ramp

What is the difference between simple and complex machines?