3rd grade science Review -Part 3

On the Georgia coast, sand dunes are a habitat for several kinds of small animals.  They build tunnels inside the sand dunes. What about these animals make them able to live inside sand dunes?

• sharp claws and paws that can move fast
• long arms and legs
• short legs and very thick fur
• hard protective shells and tough skin

Which of the following statements is true about the nature of magnetic materials?

• Minerals containing iron are magnetic.
• All magnets are man-made.
• Minerals cannot act as magnets.
• All metals act as magnets.

Which of the following is NOT a way to sort rocks?

• by humus content
• by density
• by color
• by hardness

How does throwing batteries in the garbage harm the environment?

• Throwing batteries in a landfill does not harm the environment
• In a landfill, batteries can pollute the soil
• Batteries in the landfill can accidentally cause electrical charges
• Batteries rot and smell bad in landfills.

Weathered rock that is mixed with air, water, and humus makes

• new rock
• soil
• minerals
• Earth's crust.

Where do natural magnets come from?

• They are made by exposing some kinds of rock to air.
• They are made by exposing some kinds of rock to sunlight.
• They are made of the mineral magnetite.
• They are made from certain kinds of soils.

What tool do scientists use to view things that are too small to see with the eyes?

• a telescope
• a mass balance
• a microscope
• a pair of binoculars

Which of the following items does not belong with the others?
iron               steel
copper         magnetite

• iron
• steel
• copper
• magnetite

How do people get minerals?

• They are mined from deep within the ground.
• They are stored in magma with the Earth's mantle.
• They are absorbed from the air.
• They come from all organic matter.

How does Georgia's mountain habitat differ from the coastal habitat?

• The mountain habitat has freezing temperatures while the coast does not.
• The mountain habitat has lots of salt water while the coast does not.
• The mountain habitat has very sandy soil while the coast does not.
• The mountain habitat has soggy soil while the coast does not.