Sometimes, small pieces of rock or dust enter the Earth's atmosphere. When this material heats up and burns, it glows and becomes

visible from the Earth's surface.

These burning pieces of material are called

A. meteors

B. moons

C. comets

D.

planetoids

The first element on the periodic table of elements is carbon. a. true b. false

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box