Oceans!

What causes the waves in the ocean?

• wind

• sand

• sun

• animals

algae in the ocean provide much of Earths -

• Nitrogen

• Hydrogen

• Carbon Dioxide

• Oxygen

The amount of salt found in water describes the water's -

• brackishness

• freshness

• salinity

• cleanliness

Which of these are the deepest parts of the ocean?

• Continental slopes

• Abyssal plains

• Continental shelves

• Ocean trenches

Identify each true statement about organisms that live on the continental shelf of the ocean

• These organisms survive the best among warmer temperatures

• These organisms live in a very cold and dark part of the ocean

• These organisms must be adapted to varying salinity

• These organisms live deep in the water

What do the arrows on the map represent?

• Water density

• Time between tides

• Ocean currents

• Size of waves

High and low tides on the coast are caused mostly by-

• underwater earthquakes

• the gravity from the moon

• storms over the ocean

• the tilt of the Earth

The main difference between ocean water and lake water is that ocean water contains —

• Oxygen

• Salt

• algae

• plants

Which of these is not considered ocean pollution?

• Oil spills

• Artificial reefs

• Dumping garbage

• Chemical runoff

Submarines have explored many parts of the ocean. As submarines descend, scientists observe that there is an increase in the —

• Water pressure

• water temperature

• types of ocean organisms

• amount of light