Earth’s Oceans and the Ocean Floor

The largest ocean is the _______ Ocean, which contains nearly 50 percent of Earth’s ocean water.

• Pacific

• Indian

• Atlantic

• Southern

_______ is the amount of dissolved salts that are present in water.

• Salinity

• Density

• Sediment

• Porosity

T/F: Salinity varies slightly from one location to another as a result of the water cycle and climate variations.

• True

• False

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

T/F: Salinity varies slightly from one location to another as a result of the carbon cycle and cultural variations.

• True

• False

The water cycle can lower salinity in regions with _____ precipitation.

• heavy

• light

• little

• small

Tags

NGSS.MS-ESS2-4

Salinity increases in areas of high __________.

• evaporation

• transpiration

• condensation

• sublimation

Tags

NGSS.MS-ESS2-4

Scientists divide the ocean into three temperature layers based on depth:

• the surface layer

• the thermocline

• the deep zone.

• the atmosphere

__________ affect the density of ocean water.

• Temperature and salinity

• Only salinity

• Only temperature

• Neither temperature nor salinity

The ______ of the water increases as its salinity increases.

• density

• flavor

• liquidity

• flow

Ocean water becomes denser as its temperature _______.

• decreases

• increases

• remains constant

• sharply increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4