A small two-pronged metal device that, when trapped, produces the fixed pitch then musician then tune their instruments based on the pitch.

___ is the form of energy that is produced when vibrations travel through a medium.

You produce it when you talk, whistle, laugh and sing.

The back and forth movement creates ____ ?

When the sound vibrations reach your ears they become ____??

Sound waves cannot travel through a ____ ?

This is an area where no matter is present.

Sound travel faster in _____ than air?

When the sound strikes a surface and it penetrates it is called____?

When the sound strikes a surface and it is reflected it is called____?

When you make much effort and energy you create a strong vibration and make ____?

When you make a little effort and energy you create a less effort and energy, you create weak vibration ____?

The loudness and softness of sound is called ____ ?

The highness and lowness of a sound id called ___?

Slow vibration produced_____?

A thin string of a violin will produce ____?

A thick string of violin will produce a ____?

Uncontrolled sounds create ___?

The highest type of landform on Earth.

A mountain with an opening through which it releases lava, ashes, and hot gases.

A ____ is an opening which you can see in the top of a volcano.

It is smaller than a mountain.

A steep face of rock or soil.

___ is a rock that is formed from the remains of marine organisms such as corals.

A large, flat area of land on a mountain.

common plants that grows in plateaus

Low level place between mountains.

___ is a wide, flat area of land. It is excellent place for farming and for building homes.

___ is a large piece of land completely surrounded by water.

___ Is a body of land surrounded by water on its three sides.

___ is a narrow piece of land that links two large landmasses separated by a body of water.

A chain of island grouped together in a sea or an ocean.

Earths largest water form is known as ____?

It covers most of earths surface.

A large body of saltwater that is smaller than an ocean.

A part of ocean or a sea that is partly surrounded by land.

Bigger than a bay.

Is a body of water that is partly surrounded by land. It is usually smaller than a gulf.

It is a narrow body of water that connects two large bodies of water.

it is a shallow body of water separated from a bigger water form by islands, reefs or sandbars.

It is a long flowing body of fresh water that empties into a sea or a bay.

Is a body of still water that is surrounded by land and that does not flow out to a river, bay or sea.

It is a body of standing water surrounded by land.

It is smaller than lakes.

It is a body of water that falls from a high place.

Water that comes from a lake, spring, stream, creek, brook, or river.

The ___ is the main source of light that brightens the surroundings.

___ is a form of energy. It is around you everyday.

Without light you would not be able to___?

The sun is an example of ______ sources of light.

They are found in nature and produce light that is not made by people.

Light may also come from ______ or those made by people.

Object that produce their own light are called ____?

Other contains materials that glow in the dark.

___ are objects that cannot produce their own light and do not glow in the dark.

When light is blocked by an object, the object forms a ___?

It is the dark shape that the object forms on its surrounding areas.

When object allows little light to pass through them, they form a light shadow, the objects are called ___?

When light cannot pass through an object, the object forms dark shadows. They are called___?

When object allows light to pass through them, they do not form shadows. These are called ____?

The part of your eyes that sends to your brain messages about what you saw.

The bending of light is called?

The bouncing back of light from a surface is called__?

A piece of transparent glass that produces different color when light passes through it.

____Is a form of energy that is measured by temperature.

___ refers to how hot or cold an object is.

Temperature is measured using ____?

Thermometer is an instrument that contains a liquid called__?

Is a from of energy that humans and other organisms need everyday in order to survive.

___ is the energy produces by tiny charged particles.

a tiny charged particles is called ____?

The flow of moving electrons is called ___?

___ are household machines that use electricity.

What is the main example of a natural sources of electrical energy?

This is a machine that is used to convert energy into electricity.

This is an object that contains stored energy that is then used as electricity.

USES of Electricity

How to conserve heat and electrical Energy?