Energy produced by vibrations. 

• mechanical
• sound
• light
• thermal

Which of the following uses electricity for energy? 

• a windmill
• a street light
• a solar cooker
•  a wind-up toy

Which of the following uses electricity for energy? 

• a windmill
• a street light
• a solar cooker
•  a wind-up toy

What is the difference between refraction and reflection? 

• light bends when it is reflected and bounces off when it is refreacted
• light bounces off when it is reflected and bends when it is refracted
• light travels in curved lines when it is reflected and straight lines when it is refreacted
• when light is refracted it no longer travels 

Which of the following best uses mechanical energy to perform a useful task? 

• flashlight
• pencil sharpener
• candle
• solar calculator

Energy produced from burning coal.

• sound
• mechanical
• electrical
• thermal

Daniel has chores to do around the house.  I which of his chores does he use thermal energy? 

• Cook eggs for breakfast
• oil a squeaky door hinge
• sweep the back porch 
• dig weeds in the garden 

Students decided to explore thermal energy used in the classroom.  Which instrument should the students use? 

• microscope
• thermometer
• timer
• graduated cylinder

Which motion causes a flag to be raised or lowered from a flagpole? 

• Back and forth motion
• push and pull motion
• magnetic attraction 
• rubbing together of surfaces

Which statement correctly explains why you see the bear upside sown in the picture? 

• light is refracted by the water, creating an image of the bear
• light is absorbed by the mirror, creating the image of the bear
• light is being reflected by the water, creating and image of the bear
• light is conducted by the water creating an image of the bear