Third Grade Science Review

The land between the mountains and coastal plain is the

• valley.
• piedmont.
• wetlands.
• swamp.

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

• foam mug.
• metal mug.
• insulated mug.
• ceramic mug.

Why is mica a mineral?

• It is rare on Earth.
• People mine it.
• It is made of rocks.
• It is a solid that has never been alive and is found in nature.

How is the way a plant smells an adaptation?

• Scents can attract insects to a plant's flowers.
• 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.

Which is attracted to a magnet?

• metal
• graphite
• iron
• aluminum

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

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