SOL 4.7 Oceans

As you swim deeper towards the ocean floor, ​ ​ (a)   and ​ (b)   increase.

• pressure

• salinity

• light

• temperature

Answer explanation

As you swim deeper into the ocean, pressure increases due to the weight of the water above you. Salinity can also increase as depth affects the concentration of salts in the water, making these the correct answers.

As you swim deeper towards the ocean floor, ​​ ​ (a)   and ​ (b)   decrease.​

• light

• pressure

• temperature

• salinity

Answer explanation

As you swim deeper into the ocean, both light and temperature decrease. Light diminishes due to water absorption, while temperature drops because deeper waters are generally colder.

Tags

NGSS.MS-PS1-4

Label the parts of the ocean floor.

a

b

c

d

e

continental shelf

trench

continental slope

continental rise

abyssal plain

What is salinity?

• the amount of sand in sediment

• the speed a wave is traveling

• the distance from the ocean's surface to the ocean floor

• the amount of salt dissolved in water

Answer explanation

Salinity refers to the amount of salt dissolved in water, particularly in oceans and seas. It is a key factor in determining water density and marine life distribution, making it the correct choice among the options.

The deepest part of the ocean floor is a/an

• abyssal plain

• continental rise

• continental slope

• ocean trench

Answer explanation

The deepest part of the ocean floor is an ocean trench, which are narrow, deep depressions in the ocean floor. Abyssal plains, continental rises, and slopes are shallower features compared to ocean trenches.

Coral that has attached itself to the ocean floor is an example of a ____________.

• floating organism

• non-moving organism

• swimming organism

• nonliving object

Answer explanation

Coral that has attached itself to the ocean floor does not move from its location, making it a non-moving organism. Unlike floating or swimming organisms, it remains fixed in one place.

The salinity of ocean water is the same around the world.

• true

• false

Answer explanation

The salinity of ocean water varies due to factors like evaporation, precipitation, and river inflow. Therefore, the statement is false.

Most ocean wildlife lives in the continental rise.

• true

• false

Answer explanation

The statement is false because most ocean wildlife actually thrives in the continental shelf, not the continental rise, which is deeper and less conducive to diverse marine life.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Marine organisms are impacted by ocean currents.

• true

• false

Answer explanation

True. Ocean currents play a crucial role in the distribution of marine organisms, affecting their migration, feeding, and breeding patterns.

Tags

NGSS.MS-ESS2-6

There are no decomposers in the ocean.

• true

• false

Answer explanation

The statement is false because the ocean has decomposers, such as bacteria and fungi, that break down organic matter, recycling nutrients back into the ecosystem.

Tags

NGSS.MS-LS2-3