two balls are moving toward each other on a track. The balls collide. A student claims there is a change in energy when the balls collide.
Which evidence would support the student's claim
A. the balls get heavier
B.the balls move past each other
C.the balls stop after they collide
D.the balls change color after they collide
C. the balls stop after they collide
the surface of the earth is not level although weathering and erosion have been occurring for millions of years.
Which of the best explanation of this observation.
A.the sea level keeps changing
B.movements in the earth's surface continue to occur
C.there has not been enough time
D.wind and water erosion are not strong enough
E.glacier movement is required to smooth the earths surface
B. movements in the earth's surface continue to occur
the formula for a molecule of glucose a type of suger is C6H12O6
how many atoms are in each molecule?
A.6
B.12
C.18
D.24
E.30