Heat Energy
Other than friction and sunlight, what is the third category we sort sources of heat energy into?
a. rubbing
b. burning
c. temperature
d. sun
burning
True or False?
The sun affects all materials the same way.
a. False
b. True
False
What happens when you rub two objects together?
a. They get colder
b. They produce heat
c. They stay the same temperature
d. They disappear
b. they produce heat
Which is a source of heat energy we cannot live without?
a. fuel
b. sun
c. food
d. light bulbs
B. sun
What is the amount of heat in an object?
a. Temperature
b. Mass
c. Time
d. Volume
a. temperature
Sunlight carries light and ____ from the sun to the Earth.
a. sunlight
b. energy
c. heat energy
c. heat energy
What is the primary reason we feel warm when standing in the sun?
a. Reflection of light
b. Absorption of heat energy
c. Wind blowing
d. Evaporation of sweat
b. Absorption of heat energy
True or False? The amount of friction depends on the weight of the objects pressing together.
a. True
b. False
a. True
Which of the following is a natural source of heat?
a. hair dryer
b. volcano
c. hot tub
d. freezer
b. volcano
We measure temperature in degrees...
a. Fahrenheit
b. Celsius
c. Both
d. Nothing
c. both
Which direction does heat flow?
a. Heat flows from an object with the same temperature
b. Heat flows from cold to hot
c. Heat flows from hot to cold
d. Heat doesn't flow in one direction
c. heat flows from hot to cold
Which material would likely feel hotter in the sun?
a. White cotton shirt
b. Black leather jacket
c. Silver foil
d. Transparent plastic
b. Black leather jacket
When you walk, there is friction between your __________ and ______________.
a. ground and air
b. feet and ground
c. feet and air
d. air and ground
b. feet and ground
Which is NOT a source of heat?
a. The sun
b. A stove
c. An unlit candle
d. A lighter
c. an unlit candle
Which of the following materials is likely to feel cooler on a hot day?
a. Metal
b. Wood
c. Plastic
d. Glass
b. wood
What happens to the temperature of an object when it absorbs heat energy?
a. It decreases
b. It remains the same
c. It increases
d. It fluctuates
c. it increases
Which statement explains why light from the sun can warm up water in a glass?
a. light travels very fast
b. water reflects light energy
c. Water absorbs light energy
d. light travels in a straight line
B. Water absorbs light energy from the sun, which increases its temperature. This is why sunlight can warm up water in a glass, as opposed to reflecting it or traveling in a straight line.
Friction is a force that acts in an ___________ direction of movement.
a. similar
b. opposite
c. parallel
d. west
b opposite
Which list contains all sources of heat?
a. Sun, unlit candle, lighter
b. Freezer, temperature, sun
c. Eating, friction, lighter
d. Temperature, sun, toaster
c. eating,Friction, lighter
It was a very sunny day. Mike wants to wear a shirt that is going to keep him cool. What color shirt should he choose?
a. Black
b. White
c. Blue
d. Green
b. white
What causes hot and cold water to become the same temperature once they are combined?
a. The heat moves from cooler temperature to warmer temperature.
b. The energy of the hot water runs out.
c. Heat (thermal) energy from the hot water is transferred to the cold water.
d. Heat (thermal) energy causes the water to boil.
c. Heat (thermal) energy from the hot water is transferred to the cold water.
Shade protects and _______ relief from the Sun's heat.
a. energy
b. provides
c. supports
d. needs
b. provides
How does friction affect speed?
a. more friction decreases speed
b. more friction increases speed
c. less friction decreases speed
Metal gets hot easily, so it absorbs heat _____.
a. easily
b. slowly
a. easily
Why do dark-colored materials absorb more light than light-colored materials?
a. They have a smoother surface
b. They reflect all wavelengths of light
c. They convert light into heat more efficiently
d. They do not reflect light as well as light-colored materials
d. They do not reflect light as well as light-colored materials