3rd Grade Science Review*

The region between the mountains and coastal plain is the

• valley.

• piedmont.

• wetlands.

• swamp.

Four friends each put hot cocoa in a different cup.  The cocoa that will cool the fastest is the one in the

• foam cup.

• metal cup.

• insulated cup.

• ceramic cup.

Answer explanation

Metal is a conductor and cannot hold heat inside the cup. It allows heat to flow through it and away quickly!

Why is mica a mineral?

• It is rare on Earth.

• People mine it from the Earth.

• It is made of rocks.

• It is a solid found in nature that has a pure chemical composition and has never been alive.

How is the way a plant smells an adaptation?

• Scents attract insects to flowers for pollination.

• Scents make a garden more pleasant.

• Scents can help plants survive in different climates.

• Scents help plants get sunlight.

Friction produces heat when two objects are

• mixed together.

• rubbed together.

• burned

• attracted to magnets.

A new oven advertises that it loses less heat into the room than older ovens.  What is the MOST LIKELY reason?

• It gets hotter.
• It has better insulation.
• It uses electricity.
• It does not get as hot.

Pencils contain the mineral graphite.  What property does graphite have that makes it useful in pencils?

• its shine

• its strength

• its low hardness

• its narrow shape

Answer explanation

Graphite is 1 to 2 on Mohs Hardness Scale. Because it is soft, it easily rubs off on paper.

Sandstones forms when layers of sand harden.  What type of rock is it?

• igneous
• sedimentary
• metamorphic
• fossilized

Where would you find the MOST humus?

• topsoil
• subsoil
• sandy soil
• bedrock

A metal roof gets very hot on a summer day.  What is the source of the heat energy?

• sun
• air
• clouds
• weather