Physical Science Ch.15

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Example of thermal energy

Fire

Examples of Nuclear energy

Fission and fussion

Example of elastic potential

Rubber band

What is energy

The ability to do work

Elastic potential

The potential energy of an object that is stretched or compressed

How are work and energy related

You can have energy and not have work

Formula for kinetic energy

1/2MV^2

Gravity

9.8 m^2

On example of electromagnetic energy is

A falling oyster

And example of the conversion of gravitational potential energy into kinetic energy is

A falling raindrop

Electromagnetic energy

A form of energy that travels through space in forms of waves

An example of an object having elastic potential energy is

A stretched spring

Example of energy conversion

Apple in a tree, Flashlight, Sterio

Example of potential and gravitational potential energy

Apple on the tree

Energy stored in the bonds between Atoms is called

Chemical energy

Flashlight

Chemical>electric>electromagnetic>thermal energy

What happens to atoms when they are cold and hot

Cold= Slower Hot=Faster

Sterio

Electric>mechanical>sound

Electrical energy

Energy associated with electric charges

Mechanical energy

Energy associated with motion and position of every day objects

Law of conservation

Energy can't be created or destroyed

The law of conservation of energy states that

Energy cannot be created or destroyed

Kinetic energy

Energy of motion

Chemical energy

Energy stored in chemical bonds

Renewable resources

Energy that can be replaced in a short period of time

Nuclear energy

Energy that is located in a atoms nucleus

Potential energy and gravitational potential energy

Energy that is stored as a result of position or shape

Albert Einstein's equation

Energy= mass(speed of light)^2 E=MV^2

Example of kinetic energy

Falling leaf

Fission and fission defs

Fission= atoms split apart: nuclear weapon Fission= 2 atoms nuclei join together: the sun

Examples of NRR

Fossil Fuels=Nat.Gas, petroleum,coal Nuclear Fuels=uranium,plutonium

What energy resource accounts for most of the worlds present energy use

Fossil fuel's

What is the source of geothermal energy

From earth

Example of chemical energy

Fuel

Examples of RR

Hydroelectric, solar, wind, geothermal

Everytime a chemical bond _ ____, energy is ___

Is broken , released

Work

Is energy

How does the potential energy of an object change when it's height is tripled

It triples too

What is energy measured in

Joules

The energy of a moving object is

Kinetic energy

What is the difference between kinetic and potential energy

Kinetic equals energy is moving, potential equals energy is stored

What are the four types of energy

Kinetic, potential, gravitational potential, elastic potential

Example of electrical energy is

Lightning

Non-renewable resources

Limited quantities of energy that can't be replaced

Is mechanical energy always conserved? Explain why or why not

Mechanical energy is never conserved because friction is always there

The six forms of energy

Mechanical, thermal, chemical, electrical, electromagnetic, and nuclear

example of mechanical energy

Moving train

Formula for potential energy

PE= MGH, Mass(gravity)(height)

Energy conversions

Potential energy changes to kinetic energy

Explain the energy conversions that occur as a basketball Falls, hits the ground, and bounces back up. Ignore frictional forces

Potential to kinetic to friction/sound/elastic

Apple in a tree

Potential>kinetic>friction>bouncing>sound

If the speed of an object doubles, it's kinetic energy...

Quadruples

Why/ how creation of energy occurred

Something

Thermal energy

The amount of movement in the particles of an object

Mechanical energy is

The sum of the kinetic and potential energy of an object

Most renewable energy originates from

The sun

What happens to the atoms of an object if it's thermal energy is increased

They move faster

Why are cool, oil, and natural gas considered to be non-renewable energy resources

They take too long to renew it

Solar

Use solar power to make electricity

Hydroelectric

Use water moving to make electricity

Geothermal

Uses heat beneath earths surface

Wind

Uses turbines to move when wind blows

Example of electromagnetic energy

X-Ray, Sun


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