6th Science Ch. 10 Test

A ___________________ cannot be replaced quickly or easily

• nonrenewable resource

• renewable resource

• natural resource

• waste

The ___________________ of a machine compares the amount of work a machine does to the amount of energy put into the machine.

• energy

• conservation

• efficiency

• fossil fuels

The efficient use of resources is called

• conservation

• nonrenewable resource

• natural resource

• energy

Scientists define ___________________ as the ability to do work

• nonrenewable resource

• renewable resource

• efficiency

• energy

___________________ are products and materials found in nature that people use.

• natural resource

• renewable resource

• energy

• efficiency

___________________ are energy resources formed from the remains of plants and animals that lived more than 100 million years ago.

• geothermal energy

• biomass

• fossil fuels

• solar energy

Thermal energy from Earth's interior is called

• biomass

• geothermal energy

• hydroelectric energy

• solar energy

The Sun supplies

• solar energy

• biomass

• geothermal energy

• hydroelectric energy

Once-living matter, such as food scraps and animal waste is known as

• solar energy

• geothermal energy

• hydroelectric energy

• biomass

Which word pairs name forms of energy?

• light and sound

• lamps and radios

• cars and buses

• batteries and calculators