The mixture of gases that surround the Earth is called its __________________
The gas that almost all organisms need to live is:
- carbon monoxide
- oxygen
- nitrogen
- hydrogen
The layer of the atmosphere that screens out 99 percent of the Sun's ultraviolet rays is called the ________ layer.
Most of the air in the atmosphere is:
- oxygen
- nitrogen
- water vapor
- hydrogen
Fuels that were formed from the decay of ancient forms of life are called __________ fuels.
Fossil fuels are considered to be:
- renewable resources
- nonrenewable resources
- neither
Check the items that make up smog:
Acid rain, smoke, smog ground level ozone are all forms of air ______________ .
Check which of the folllowing can cause of air pollution:
Plants take in ________ and produce _______________ .
- carbon monoxide, carbon dioxide
- hydrogen, nitrogen
- carbon dioxide, oxygen
- oxigen, carbon dioxide
Over 97% of the Earht's water is:
- fresh water
- salt water
Which is the main source of water in the water cycle:
- reservoirs
- aquifers
- the oceans
- trees
Select the resources we can obtain from the ocean: (Check all that apply.)
Water vapor cools and turns into tiny droplets of water that collect into clouds, This process is called:
- evaporation
- condensation
- precipitation
- polution
Check all the sources below that are how fresh water can be polluted:
An underground layer of rock or soil that is filled with water is called an _____________ .
The process of removing salt from sea water is ______________ .
When you go to the beach and walk out into the ocean, you are walking on the part of the ocean floor called the ___________.
- continental slope
- continental rise
- continental shelf
- abyssal plain
Surface currents on the ocean are driven by the ____________ .
As waves move forward in the ocean, the water particles in the wave also move forward.
- True
- False
The ocean has streamlike movements of water called ocean ______________ .
- tides
- rivers
- currents
- flows
When an ocean wave approaches the shore, it gets
- higher
- lower
- stays the same
The deepest part of the ocean occurs in
- the abyssal plain
- the mid-ocean ridge
- a trench
- the continental slope
Which is a steeper and deeper part of the ocean?
- the continental shelf
- the continental slope
Ocean currents can either warm and cool coastal lands.
- True
- False
Tidal range is greatest during:
- spring tide
- high tide
- neap tide
- the winter
The primary influence on ocean tides is the _______________.
Most of the Earth's oxygen supply is produced by:
- animals exhaling
- decaying bacteria
- green plants
- evaporation
The source of geothermal energy is:
- nuclear fission
- fossil fuel
- the Earth's internal heat
- the ocean tides
What are required to turn dead plant and animal remains into oil and natural gas. (Check all that apply.)