Ch. 6 Earth & Space Science

An investigation was done with an electromagnet made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured. What is the dependent variable?

• The electromagnetic system

• The different sized nails

• The number of paper clips picked up

• The battery

An investigation was done with an electromagnet made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured. What is the independent variable?

• The battery

• The number of paper clips picked up

• The different sized nails

• The electromagnetic system

Resources that are replaced during an average human life span are called

• renewable resources

• nonrewable resources

• concrete resources

• abstract resources

Resources that are used up faster than they can renew are called

• renewable resources

• nonrewable resources

• concrete resources

• abstract resources

The number one source of carbon dioxide in the atmosphere is_________________. 

• earthquakes

• tsunamis

• volcanoes

• hurricanes

_______________ is the transfer of heat energy from one substance to another or within a substance that are in direct contact with each other. 

• conduction

• radiation

• convection

• heatation

The processes that move matter and energy from one sphere to another is called

• systems interactions

• sphere interactions

• systems cooperation

• sphere competitions

Which of the following contains all the life forms on Earth?

• hydrsphere

• biosphere

• geosphere

• cryosphere

The atmosphere contains which of the following? You must choice all correc tanswers.

• rocks and minerals

• gases and particles

• clouds

• water

Earth is

• an open system

• a closed system

• a partially open system

• it is not a system