8th grade - NC hydrosphere

Which best determines the health of a lake used as a source of freshwater?

• its depth and width

• its temperature and pH

• its location and depth

• its temperature and depth

If a body of water had high turbidity levels, what can most likely be concluded?

• It has a low pH

• It is unsafe to drink

• It is too hot to drink

• It contains a lot of chemicals

Pamlico Sound is an estuary because it is

• An area fed by several rivers

• An area that many watersheds drain into

• An area that is protected by land on both sides

• An area where freshwater mixes with salt water

Which is the process that moves sediment from one location to another

• Erosion

• Volcanic eruption

• Deposition

• Weathering

Which of the following occurs when algae decompose in the ocean?

• Decomposers at the ocean's surface remove oxygen from the air

• Decomposers add oxygen to the ocean water

• The ocean water releases excess oxygen into the air

• Decomposers remove oxygen from the ocean water

Tags

NGSS.MS-LS2-3

Which of the following are indicators of a healthy water source?

• High nitrates, high pH, and low temperature

• Low temperature, high dissolved oxygen, and neutral pH

• Low pH, high nitrates, and low dissolved oxygen

• High turbidity, high dissolved oxygen, and high temperature

Tags

NGSS.MS-LS2-1

Under which conditions are large numbers of fish in a lake most likely to die?

• Right after a storm with heavy rainfall

• When the water's dissolved oxygen is high and temperatures are lower than average

• When the water's dissolved oxygen is low and the temperatures are higher than average

• When the water's turbidity is low and temperatures are in the average range

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An algal bloom in a water system is most likely caused by

• Large amounts of nutrients in runoff

• High oxygen levels in the water

• Increased use of fossil fuels

• Decreases in fish population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Organisms that indicate the health of a water ecosystem

• Ecoindicators

• Bioindicators

• Algae

• Organindicators

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water

• photosynthesis

• cellular respiration

• green plasma transfer

• synthesized consumer

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3