Eutrophication

Which water quality indicator can be determined by measuring how light travels through water?

• turbidity

• temperature

• nutrient level

• dissolved oxygen

Which process would most likely increase the dissolved oxygen level in a freshwater lake?

• algae bloom

• lake turnover

• photosynthesis

• respiration

Tags

NGSS.MS-LS1-6

Which is the most likely result of an increase in the level of nitrates in a body of water?

• increase in turbidity

• increase in plant growth

• increase in fish population

• increase in water temperature

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How are indicator species like a warning system for bodies of water?

• They indicate when food sources are declining.

• Their illness or death indicates pollution in an aquatic ecosystem.

• They indicate when predators are reducing the numbers of a species.

• Their illness or death indicates the body of water is becoming more populated.

Tags

NGSS.MS-LS2-4

Which is an accurate prediction of the pH of a lake that receives large amounts of acid rain?

• 4-5

• 6-7

• 8-9

• 10-11

Tags

NGSS.HS-PS1-5

Which would be the most likely cause of large numbers of fish dying in a stream?

• a lack of nitrogen

• high levels of mercury

• decreased carbon dioxide

• low dissolved oxygen concentration

Tags

NGSS.MS-LS2-4

After analyzing data collected from a pond, there is a significant decrease in dissolved oxygen. Which most likely caused the decline?

• an increase in minerals

• an increase in sediment

• an increase in algae growth

• an decrease in fish population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Why does a cloudy river produce less plant life than a clear river?

• A cloudy river flows freely, while a clear river does not.

• A cloudy river has few dissolved nutrients, while a clear river has many.

• A cloudy river absorbs little heat, while a clear river absorbs much heat.

• A cloudy river blocks sunlight from reaching plants, while a clear river allows sunlight to be absorbed by plants.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What does pH measure?

• acidity/alkalinity

• dissolved oxygen

• nutrient level

• turbidity

Tags

NGSS.MS-PS1-2

A new golf course is built next to a river. Over the past several months, the nitrate levels of the water in the river have been increasing. Which best explains the cause of the increasing nitrate levels?

• increased growth of algae

• decreased biodiversity

• runoff from fertilizer

Tags

NGSS.MS-LS2-1