AQUATIC SCIENCE 8/13/2020

Salinity means

• how many fish are in the water
• how much salt is in the water

The ocean floor 

• is always a flat bed of sand 
• has mountains, plains, and ridges like land surfaces
• is covered by the same amount of water everywhere
• covers less area than land

The ocean covers 50% of Earth's surface.

• True
• False

Plankton are microscopic single-celled oragnisms. 

• True
• False

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

• oxygen
• salt
• algae
• plants

As you go deeper in the ocean, the _______ decreases. 

• water
• salinity
• temperature
• water pressure 

What do the arrows represent in the picture?

• waves
• currents
• tides

What causes the tides to change?

• rotation of the Earth
• magic
• gravitational pull from the moon
• ocean currents

Tags

NGSS.MS-PS2-4

Who were the great sailors and explorers of the Mediterranean?

• Phoenecians

• Polynesians

• Vikings

• Egyptians

Who were the great sailors and explorers of the South Pacific?

• Polynesians

• Phoenecians

• Vikings

• Egyptians