23. Removing trees from a rain forest changes the habitats for many species by (1) decreasing the temperature
(2) increasing the oxygen levels
(3) decreasing the protective cover
(4) increasing the food supply

a metamorphic rock would be formed.

regulate growth

produce insulin

control bladder

regulate bone calcium

control metabolism

produce adrenaline

reflection is the bouncing back of a propagating wave when it encounters a barrier; usually shows an image of the source of light wave

1) bounces back from an opaque material

2) bounces back from the boundary

3) seen in mirrors

refraction is the bending of a propagating wave having a shift of direction as it passes through different media; usually seen in lenses to magnify or lessen

1) passes through a prism

2) moves from one medium to another

3) seen in lenses