Science Chapter 2 - Simple Machines

What is the first step of the design process?

• Construct a prototype.
• Identify a problem to be solved.
• Do research.
• Develop possible solutions.

What can you do with a lever?

• lift up a box
• hold 2 boards together 
• slice through an object
• turn an axle

A scientist uses what he knows
to modify a wedge. The new
invention will help keep roads
clear of ice and snow in winter.
What did the scientist develop?

• a new inquiry
• a new design process 
• a new scientific method 
• a new technology

Which of the following is an example of work?

• solving a math problem
• moving a rock that DOES NOT move
• Pushing on a bike pedal
• reading a book

Which simple machine help you to hold things together.

• a screw
• an inclined plane 
• a pulley 
• a wheel and axle 

An inventor decides on a solution to a problem. What happens next?

• He designs a prototype.
• He communicates the results.
• He redesigns the prototype.
• He does research.

Identify the simple machine shown here.

• wheel and axle 
• inclined plane 
• wedge
• pulley

Look at the picture of the scissors.  What is the best description of this complex machine.

• a wedge and a lever
• 2 cutting wedges and 2 leavers that move the wedges
• 2 wedges held together by a wheel and axle
• 2 inclined planes and 2 levers 

Dave is helping his family load a moving van with boxes. He lifts up each box and places it in the van. He then climbs into the van and moves the box to the back of the truck. What simple machine could help Dave with this task?

• a wedge
• a lever
• an inclined plane 
• a pulley

What are the first 3 steps of the design process?

• identify the problem, do research, and develop possible sollutions
• choose a solution that works best, design, and test prototype
• share results with others, evaluate the prototype and redesign the prototype if necessary
• design a prototype, test the prototype, and share the results