Heat2

 Linda leaves a piece of candy out in the sunlight. She comes back to find it has melted. Which statement about the candy is true

•  The candy was melted by sound waves.
  
• The candy was melted by light energy
•  The candy was melted by heat energy.
  
• The candy was melted by motion energy. 

 The chart shows what Shelly recorded as she checked the temperature outside her house throughout the day. Use the chart to answer any questions that follow.
Time Temperature
 6:00 a.m.    60°F
 9:00 a.m.    70°F
12:00 p.m.   75°F
3:00 p.m.     80°F
6:00 p.m.     75°F
9:00 p.m.       ?
Which of the following temperatures is Shelly most likely to observe at 9 p.m.?

• 60 degree F
• 70 degree F
• 80 degree F
• 90 degree F

 How does a jacket work as an insulator?

• It creates heat that can warm the body
• It warms the cold air outside of the jacket
• It slows body heat from moving to the cold air around it
• It stops all body heat from moving to the cold air around it. 

 Wanda pours cold water into an insulated bottle. The next morning, she notices the water is still cool. Which best describes why the water is still cool?

• The insulation stops all cold from leaving the bottle
• The insulation slows down the movement of cold out of the bottle
• The insulation stops all heat from entering the bottle
• The insulation slows down the movement of heat into the bottle

Mixing which of these things can produce heat?

• different foods
• different beverages
• different chemicals
• different metals

Al rubbed two blocks of wood together. When he finished, he noticed that the sides that were rubbed together were warm. What caused the sides of the wood to be warm?

• burning
• electricity
• friction
• mixing

Most pots used to cook with have handles that are made of either plastic or wood. These materials are used because they will stay cool to the touch while being used on the stove. Why are many handles made of plastic or wood?

• They look best
• They will get very hot
• They are good conductors
• They are good insulators

Which instrument should be used to measure temperature?

• stop watch
• thermometer
• measuring tape
• graduated cylinder

Forest fires broke out in Okefenokee Swamp in Georgia a couple of years ago. The fires damaged many trees and plants in the swamp. How was heat produced which caused damage to the trees and plants?

• burning
• convection
• friction
• radiation

Heat always transfers from a _____ object to a ____ object.

• warmer, cooler
• cooler, warmer