Which of these layers is made mostly of iron and nickel? inner core, core, mantle, &

crust

Is freezing outside on a cold day conduction convection or radiation?

What is a similarity between mass and weight?

Two identical billiard balls are rolling toward each other at the same speed. What will be true after they collide head-on?

During which of the following chemical changes does a precipitate form? Select one: a. vinegar is added to baking powder b. lemon juice is added to water c. lemon juice is added to milk d. a banana ripens

A standard of living that is below the minimum level considered adequate by society.

Why is it important to develop alternative energy sources

Which of the following subatomic particles does not have a charge? A.) electron B.) proton C.) neutron D.) positron

How do we use light in space?

What units are used for gravitational potential energy? Write the name, not the symbol.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa B. 73.5 Pa C. 226.5 Pa D. 122.5 Pa