What are all things made of:

a) atoms

b) elements

c) air

A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 5.9 m/s. if the coefficient of friction between the sled's runners and snow is 0.

What is a mutation?

What do the four terrestrial planets and the four gas giant planets have in common? a. they all revolve about the sun in the same direction. b. they are all the same size. c. they all have identical orbital shapes. d.

What kind of mixture is a solution? a colloid?

How does the interior of the earth relate to what occurs on the surface?

A force acts on a 5kg object at rest. How fast will the object accelerate on a frictionless surface? A.) 4 m/s^2 B.) 15 m/s^2 C.) 25 m/s^2 D.) 100 m/s^2

Four wrestlers step on a scale for a tournament. Wrestler A weighs in at 170 pounds; wrestler B weighs in at 168 pounds; wrestler C weighs in at 171 pounds; and wrestler D weighs in at 169 pounds.

What is a change in velocity per time

Recall specific heat of water is 4186 j/kg/C. Find the specific heat of sample. Water. Sample Mass 109 192 Internal temperature. 21. 67 Final temperature. 30.1. 30.1

During which period did the first large herbivores and carnivores appear?