A wave that can travel through empty space and

through matter

Which sphere of Earth includes icebergs? atmosphere biosphere cryosphere geosphere

How do we determine the age of rocks and other geologic features?

What is a substance? A. a uniform mixture that can't be separated OB. a mixture that can be separated C. a single component that can't be separated D. a single component that can be separated Undo Next

The slope of a position versus time graph represents the object's A. acceleration B. displacement C. position D. velocity

Should rare earth metals continue to be used in magnets? How come?

Friction is a force that speeds up motion between two surfaces that are in contact

Which actions are evidence that a chemical reaction has occurred? Check all that apply. A: a change in color B: the formation of a precipitate C: a clear liquid becoming cloudy D: a change in shape E: the formation of bubbles F: the formation of

Which sphere forms Earth's outermost layer? Atmosphere Biosphere Cryosphere Hydrosphere

an 100kg object traveling at 50m/s collides (perfectly inelastic) with a 50kg object initially at rest. what is the sum of the momentum of both objects prior to the collision?

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?