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Chapter 14

Light and Heat

QuestionAnswer
The way heat travels through materials that are touching is __________________________. conduction
Heat that can't be used to do work is _________ _________. waste heat
The movement of heat in liquids and gases is_________________. convection
Light bending when it changes speed is _____________________. refraction
___________________ is the movement of heat without matter. Radiation
__________________is light bouncing off an object. Reflection
The change of energy from one form to another is ________________ ________________. energy transfer
_______________ is a form energy that can travel through space. Light
Which cup will have more energy, a large cup with hot liquid, a small cup with hot liquid, or a large cup with cold liquid? How do you know? Large cup with hot liquid. It has a large amount that is warm. The warm particles have more heat energy, because they are moving faster that the cold particles.
Clear plastic wrap is __________________. transparent, opaque, translucent transparent
Waxed paper is ____________________. transparent, opaque, translucent translucent
Aluminum foil is _____________________. transparent, opaque, translucent opaque
A door is ___________________________. transparent, opaque, translucent opaque
A window is _____________________. transparent, opaque, translucent transparent
Frosted glass is _____________________. transparent, opaque, translucent translucent
When a spoon is placed in boiling water, the spoon heats up. What type of energy transfer is this? conduction
Sunlight and heat travel through space to reach the Earth. What type of energy transfer is this? radiation
Water is boiling on a stove. What type of energy transfer is this? convection
Hot air in your house rises to the upper floors. What type of energy transfer is this? convection
A fire gives off heat and you can feel it without touching the fire .What type of energy transfer is this? radiation
How do warm particles move in matter? They move quickly.
How do cold particles move in matter? They more slowly.
Which items produce waste heat? light bulb, chair, oven, toaster, coat, car engine light bulb, toaster, oven, car engine
What does average temperature measure? It measures the average movement of particles.
Why does liquid in a thermometer rise when it is warmed up? The liquid rises because the particles begin to move faster because they are warmed up.
If you put an item in water and the temperature of the water rises, what can you infer about the temperature of that item? You can infer that the item is hot and the heat is moving from the hot item into the water.
How does light travel? in a straight line
Created by: Mrs. Furlong