The ozone layer
is part of the troposphere
is used to send radio signals
protects the earth from uv radiation
is made of charged ions and free electrons

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.