Which of the following is true regarding the Earth's mantle?
A
It is made mostly of liquid metal that allows it to flow.
B
Its material moves due to convection currents.
C
It is the densest of all of Earth's layers.

D
It is the hottest of all of Earth's layers.

Match the words or actions and their definition. 1. the rate of doing work 2. a machine that changes motion 3. the force that is used to generate electricity 4. 550 foot-pounds per second 5. the force that makes things fall toward the earth 6. work in > work out 7. metric measurement of work 8. the product of force times distance water falling from a dam newton-meter gravity work windmill power the work principle 1 horsepower