Chapter 2 Science

What is the first step of the design process?

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

A scientist use 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 technology
• A new scientific method
• A new design process

Which simple machine helps you to hold things together?

• An inclined plane
• A screw
• A pulley
• A wheel axle

What can a lever do?

• Lift up a box
• Hold two boards together
• Slice through an object
• Turn an axle

Which of the following is an example of work?

• Pushing a rock that does not move
• Solving a math problem
• Reading a book
• Pushing on a bike pedal

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

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

Identify the simple machine shown here

• Inclined Plane
• Pulley
• Wedge
• Wheel and Axle

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

• A wedge and a level
• Two inclines planes and two levers
• Two cutting wedges and two levers
• Two wedges held together by a wheel and axle

Technology

• Means the use of force to move an object across a distance
  
• The use of science knowledge to invent and new ways of doing things
•  round object attached to a post called an axle
• a simple machine made from two slanted sides that end in a sharp edge
  

Wedge

• The use of science knowledge to invent and new ways of doing things
  
• a simple machine made from two slanted sides that end in a sharp edge
  
• A round object attached to a post called an axle
  
• Means the use of force to move an object across a distance