PLTW - ES - Unit 2

The amount of available fresh water on Earth suitable for human consumption is

• 5%

• Less than 1%

• 10%

• 30%

Which of the following is a heavy metal that can leach off of old pipes into water supplies?

• Copper

• Lead

• Iron

• All of these

Why is it important to routinely test water that is used for drinking or recreational purposes?

• water treatment plants are unreliable

• drinking water may acquire minerals

• drinking water may take on contaminants

• drinking water must always have the same mineral content

The safe range for pH is

• 6 - 8

• 0-4

• 6.5 - 8.5

• 8-14

. 

If a laboratory protocol asks you to add 500 uL of water to a tube, which micropipette should you use?

• p20 pipette

• p1000 pipette

• p200 pipette

• p50 pipette

What is sustainability?

• Involving methods that do not completely use up or destroy natural resources.

• The strength and vitality required for sustained physical or mental activity.

• The condition or quality of being true.

• A foreign agent (protein, toxin, or other substance) that stimulates an immune response.

In 2008 the National Academy of Engineering of The National Academies Press proposed and published 14 Grand Challenges for Engineering, which one is not a grand challenge:

• Make solar energy economical

• Reverse-engineer the brain

• Provide access to clean water

• Manage Gas Prices

Which of the following freshwater global distribution choices has the least water volume?

• Rivers

• Lakes

• Ice caps, glaciers, permanent snow

• Groundwater

Rules of behavior based on ideas about what is morally good and bad is called:

• Problems

• Ethics

• Science

• Reciprocate

What is the water footprint?

• water for cellular processes

• water for travel

• water required by our body

• water quantity required to produce goods & services