Forms of Energy
Playing an instrument is an example of ____________ energy.
Sound energy
____________ is the transfer of energy from one object to another.
Work is the transfer of energy from one object to another.
The ability to cause change is .......
Energy
Label the following three energy resources as renewable or nonrenewable:
1. Solar energy
2. Coal
3. Petroleum
1. Renewable
2. Nonrenewable
3. Nonrenewable
What is the main gas that contributes to global warming?
Carbon Dioxide (CO2)
The energy of motion is ___________ energy.
Kinetic energy
A fire converts _____________ energy into ____________ and _____________ energy.
A fire converts chemical potential energy into thermal and light (radiant) energy.
Remains of ancient organisms that have been exposed to high temperatures and pressures that we burn to use as fuel.
Fossil fuels
Where do we get most of the energy we use on Earth?
The Sun
The final goal of all power plants is to generate ________________.
electricity
Another word for light energy is __________ energy.
Radiant energy
Friction between a brake pad and the wheel of a bike converts ________________ energy into ___________ energy.
Friction between a brake pad and the wheel of a bike converts mechanical energy into thermal energy.
Define an inexhaustible energy resource and give an example of one.
An energy resource that can never be used up.
Examples: Solar energy, wind energy, hydroelectric energy.
What percentage of our energy comes from fossil fuels?
86%
List three ways we can conserve energy.
1. Turn off unused lights.
2. Turn off water when brushing teeth, take shorter showers.
3. Lower thermostat in the winter to save energy.
4. Bike places instead of driving.
5. Buy an electric car.
Give two examples of nuclear energy.
1. Solar fusion (the sun)
2. Nuclear power plants
3. Uranium
4. Nuclear bombs
Describe the highest point of potential energy and the highest point of kinetic energy when throwing a ball into the air.
Highest point of potential energy: When the ball reaches its highest point in the air.
Highest point of kinetic energy: When the ball just leaves your hand or when the ball is about to return to your hand. (points of fastest speeds)
The force that resists the sliding of two surfaces and converts mechanical energy into thermal energy.
Friction
Find the nonrenewable energy resource:
1. Solar energy
2. Geothermal Energy
3. Hydroelectric power
4. Nuclear Energy
4. Nuclear energy
A hydroelectric power plant uses ___________ energy from falling water and converts it into _______________.
A hydroelectric power plant uses kinetic energy from falling water and converts it into electricity.
_____________________ = potential energy + kinetic energy
Mechanical energy
Describe the Law of Conservation of Energy.
Energy is not created or destroyed; the energy of the universe is constant.
Energy contained in the bonds of molecular compounds. Some examples include food we eat and fuel we use to power vehicles.
Chemical potential energy
_____________ is a renewable energy resource that involves converting materials from plants and animals into fuel we can use to power vehicles.
Biomass is a renewable energy resource that involves converting materials from plants and animals into fuel we can use to power vehicles.
List two disadvantages of relying on fossil fuels.
1. There is a limited amount of fossil fuels on the Earth and they are a nonrenewable energy resource.
2. Burning fossil fuels releases carbon dioxide into the atmosphere, which contributes to global warming.