Unit 1: Nitrates and Microplastics

Nitrates are a part of the natural ecosystem.

• True

• False

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What happens when excess nitrates are in water systems?

Select all that apply.

• Cause water quality problems.

• Affects dissolved oxygen levels

• High amounts can be toxic to warm blooded animals.

• Fish grow larger.

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Which of the following are sources of nitrates in the environment?

Select all that apply.

• Wastewater Treatment plants

• Runoff from fertilizer

• Runoff from animal manure.

• Rocks and Soil

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What two rocks is Uranium most commonly found in?

• Granite

• Shale

• Shandstone

• Limestone

What elements or compounds must be present for Uranium to dissolve out of rocks?

• oxygen

• oxidants (like Nitrates)

• Acids

• Carbon Dioxide

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What are the two types of plastics?

Select all that apply.

• Synthetic

• Natural

• Fiber

• Flexible

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What is a polymer?

• A chain of small units chemically bonded together.

• One unit in a chain is called a polymer.

• 
  A compound that contains Carbon is called a polymer.

• A compound that can be melted is called a polymer.

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What are microplastics?

Select all that apply.

• Plastics that form when you microwave something.

• Plastics that we manufactured to be very small.

• Pieces of small plastic that came from larger plastic objects.

• A model of plastics when we zoom in with a microscope.

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Is microplastic formation an example of a chemical or physical change?

• Chemical Change

• Physical Change

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Excess nitrates influence the chemistry of water in the environment. Examples include influencing oxygen and Uranium concentration levels in water systems.

Is this an example of a chemical change or a physical change?

Pictured to the left is water testing for an algae bloom.

• Chemical Change

• Physical Change

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