Energy
What is the relationship between the speed of an object and its energy?
As the speed of an object increases, its energy also increases.
What happens to energy when two objects collide?
Energy can be transferred from one object to another, causing changes in motion and speed.
________________ is the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature.
a. candle
b. toaster
c. conduction
d. potential energy
c. conduction
How does burning fossil fuels affect the environment?
It increases air pollution and can contribute to climate change.
Name one way energy can be transferred by sound.
Sound travels through vibrations in air or other materials
A moving object will have more energy when the object....
a. moves faster
b. stops moving
c. changes direction
d. loses mass
a. moves faster
If a student rubs two blocks of wood together, what kind of energy will be produced?
a. light
b. heat
c. electrical
d. solar
b. heat
An _____________ prevents the energy from passing.
Insulator
Which of the following is considered a non-renewable resource?
a. sunlight
b. water
c. water behind a dam
d. fossil fuels
d. fossil fuels
Describe a device that converts electrical energy into motion.
A simple electric motor that spins when electricity flows through it.
We observe a moving object. When we observe the object moving more slowly, we know that it...
a. will move in a new direction
b. has more gravity pulling on it
c. can't go back to where it started
d. has less energy than it had before
d. has less energy than it had before
Which of the following will produce the most heat?
a. a candle
b. a rolling ball
c. a falling leaf
d. a floating cloud
a. a candle
Electric energy is transformed into _______ energy when the bulb lights.
light
The uranium used as fuel for nuclear energy was formed billions of years ago at the time of the origin of earth. Based on this information, we know that uranium is...
a. a non-renewable resource
b. a renewable resource
c. expensive fuel
a. a non-renewable resource
A spoon that has been sitting in ice gets warmer when you grasp it with your hand. Explain why the spoon gets warmer.
The heat from your hand is transferred to the spoon.
Two model trains are running on tracks that are lined up next to each other. The two trains are not moving at the same speed. What would cause one train to move faster than the other?
a. the slower train's cars have less mass
b. the faster train has more energy
c. the faster train has a wider track
d. the slower train has an older engine
b. the faster train has more energy
What type of energy is produced when a radio is plugged in?
Electric energy can be transformed to other forms of energy, such as light, sound, motion, and heat.
True or False
The burning of fossil fuels will have the greatest direct effect on the environment in which of the following ways?
a. driving animals from their homes
b. adding pollution to the air
c. killing plants in nearby ponds
b. adding pollution to the air
Explain the energy transfer from solar panels to your house.
Solar energy to electrical energy
What is energy?
The ability to do work.
What type of energy comes from dams?
hydroelectric energy
To light the bulb, sound the buzzer, or turn on the propeller, the electric current must travel along an open circuit.
True or False
False
Why are coal, oil, and natural gas considered non-renewable resources?
once we use them all, they are gone