Environmental Chemistry topic 2

Presentation

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Science

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9th Grade

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Practice Problem

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Medium

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NGSS

MS-LS2-4, MS-LS1-5, MS-PS1-3

Standards-aligned

Chelsea Kasprick

Used 39+ times

FREE Resource

5 Slides • 14 Questions

Environmental Chemistry topic 2

Science 8/9 Review

Important Topics we discussed

Monitoring Water Quality
Monitoring Air Quality
Monitoring the Atmosphere

Part 1: Monitoring Water Quality

Review

Topics

Uses of water
Water Monitoring
Parts Per Million (ppm)
What to measure
Dissolved oxygen and what affects it
Biological indicators
LD50 and Heavy Metals

Poll

Which of these does not belong in the categories we measure for in water?

Human Drinking Water

Clarity

Recreation such as swimming

Livestock drinking water

Irrigation

Multiple Choice

From the list before which of the categories was missing?

Invertebrates

Protection of aquatic life

Quality

Open Ended

State one thing that is measured in water quality?

Type response here

What we Measure

Dissolved oxygen
Biological indicators
Plant nutrients such as nitrogen and phosphorus
Acidity
Pesticides
Heavy Metals
Salts such as sodium chloride and magnesium sulfate

Multiple Choice

Is essential for the health of aquatic life such as fish, insects, and micro-organisms

Heavy Metals

Dissolved Oxygen

Acidity

Biological Indicators

Fill in the Blanks

(Blank) milligrams per litre (equal to 5ppm) of dissolved oxygen will support most organisms that live in lakes and streams.

Type answer...

Open Ended

State one factor that affects the level of dissolved oxygen?

Type response here

Open Ended

Why do scientists use biological indicators to monitor water quality?

Type response here

Fill in the Blanks

(blank) are type of biological indicator of water quality that does not cause illness themselves but shows the effects of pollution

Type answer...

Multiple Choice

If the pH of water in an aquatic environment is below 5.0 what will you see?

No aquatic life

Not many fish especially young ones

Nothing

Plenty of aquatic life

Multiple Select

Too much nitrogen or phosphorus in the water can affect dissolved oxygen in water, what does this cause? Select all that apply

large growth of algae that grows too fast for the ecosystems can handle and leads to algae blooms

illness in fish

death of large numbers of fish

Increase in fish and aquatic life

Increases the amount of dissolved oxygen

Fill in the Blanks

Toxicity describes how (blank) a substance is

Type answer...

Multiple Choice

The level of toxicity is measured by its

Acidity

Quality number

Toxic level number

LD50 number

Multiple Select

What is true about LD50? (Select all that apply)

The lower the number the more toxic it is

LD= "Lethal Dose"

The higher the number the more toxic

is 50% of a test group that dies from a specific dose of that substance

Usually received by mouth or skin contact

Open Ended

Mercury in water levels causes sickening diseases that affects people who eat fish high in mercury. Mercury is in what category?

Type response here

Environmental Chemistry topic 2

Science 8/9 Review

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