8 L 1

Which chemical elements in fertilizers pollute stormwater runoff and contribute to excessive plant growth in a water system?

• iron and lead

• copper and zinc

• calcium and magnesium

• phosphorus and nitrogen

Tags

NGSS.MS-LS2-4

Which is a bioindicator?

• current

• insect

• rock

• water

Why do biologists use indicator species?

• to compare freshwater and ocean ecosystems

• to count the number of organisms present

• to monitor water quality and biodiversity

• to analyze the dominant species

Tags

NGSS.MS-LS2-5

Which would most likely cause a sudden increase of nitrates in a waterway?

• spill from an oil tanker

• runoff from a boat yard

• runoff from a golf course

• discharge from a chemical plant

Which is the best example of a point source pollution?

• runoff from fields

• pesticides sprayed into the air

• oil spill from a boat on the Atlantic Ocean

• smoke from multiple industries in a large city

Pure water is neutral. If water is neither an acid nor a base, what is the pH of water?

• 0

• 7

• 10

We tested the effect of water temperature on how fast a sugar cube dissolves. What was the independent variable?

• Time to Dissolve

• Amount of Water

• Water Temperature

• Beaker Size

Tags

NGSS.MS-PS1-2

We tested the effect of water temperature on how fast a sugar cube dissolves. What was NOT a controlled variable?

• Size of Sugar Cube

• Temperature of Water

• Size of Beaker

• Amount of Water

Why did each group test the amount of drops of water a penny could hold before changing their variable?

• It provides more data to include in a lab report

• It ensures that the hypothesis will be correct

• It adds an independent variable to the experiment.

• It is the control and serves as the basis for comparison

What is a factor, usually being measured or observed, that responds to, or depends on, another factor.

• Independent Variable

• Dependent Variable

• Controlled Variable

• Hypothesis

Tags

NGSS.MS-LS2-1

NGSS.MS-PS2-2