Water Quality

What does Dissolved Oxygen mean?

• How much acid is in the water

• How cold the water is

• DO

• How much oxygen is in the water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

pH is the measurement of

• how acidic or basic a solution is.

• just the acidity of a solution.

• how acidic or basic the atmosphere is.

• Non of the above.

Why does pure water have a pH of 7?

• There is no such thing as pure water.

• Because pH scale is 0 to 14.

• Because water contains the equal amounts of hydrogen and hydroxide ions.

• Pure water does not have a pH of 7.

pH value of less than 7 is considered to be

• polluted.

• basic.

• like drain cleaner.

• acidic.

pH greater than 7 is considered to be

• neutral.

• basic.

• acidic.

• polluted.

Temperature of the water impacts

• what kind of organisms can live in rivers, creeks and lakes.

• the amount of dissolved oxygen.

• the amount of minerals dissolved in the water.

• all of the above

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Too far above or below a preferred range of temperature will

• decrease the number of individuals in a species.

• increase a plant's ability to do photosynthesis.

• not matter because we did not measure this.

• not act as limiting factor.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Cold water holds more dissolved oxygen than warm water.

• True

• False

Tags

NGSS.MS-PS1-4

A watershed is

• just the Colville river or just the Columbia river.

• an area of land that drains all the streams and rainfall to a common outlet such as the outflow of a reservoir, mouth of a bay, or any point along a stream channel.

• not usually impacted by humans.

• a small building that contains a water pump.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

An example of a non-point solution is 

• waste water from leaking pipe
• fertilizer runoff from lawns

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4