Earth's magnetic field is generated by

gravitational forces at the poles

exchange of gases at the poles

the movement of electrical charges inside earth

chemical reactions in the van allen radiation belt

Energy is the energy an object has because of its motion. True or False

The specific heat of ice is 0.5 calories/gram. 60 grams of ice will require __calories to raise the temperature 1°C O 0.5 30 60 120

State a material that has poor thermal conductivity

Which method would be best to separate a mixture of iron and lead pellets (of the same approximate diameter) ?

If speed increases and the time of travel stays the same, what happens to the distance traveled? a. the distance goes down, up, and then down again. b. the distance does not change. c. the distance decreases. d. the distance increases.

Select all the expressions below which represent a 20% discount off the price of an item that originally costs d dollars. A. 0.8d B. d-0.2 C. d-0.2d D. 1-0.2d

Life cycle of a medium mass star

Use the periodic table to complete this equation that represents the process of nuclear fusion. Superscript 14 Subscript 7 Baseline N + Superscript 1 Subscript 1 Baseline H yields Superscript A Subscript B Baseline C

Josh rolled a bowling ball down a lane in 2.5 seconds. The ball travelled at a constant acceleration of 1.8 m/s/s down the lane and was traveling at a speed of 7.6 m/s by the time it reached the pins at the end of the lane.

How many meters of the rock wall eroded between 1910 and 1927?