SC N 1 2

What is a statement that can be tested scientifically through experiments and/or other scientific investigations.

• Independent Variable

• Dependent Variable

• Controlled Variable

• Hypothesis

Tags

NGSS.MS-PS2-2

Group 1 found food coloring affects the amount of drops a penny holds.  Group 2 found that food coloring does not.  What should they do?

• Ignore Group 2

• Conduct it again with quarters

• They should repeat the experiment again and compare results

• Conclude that food coloring has no effect

What is empirical evidence?

• Evidence that comes from scientific testing.

• Evidence that you think but has never been tested.

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-4

NGSS.MS-PS1-2

Which best describes the relationship between temperature and dissolved oxygen in a lake?

• As temperature increases, dissolved oxygen increases.

• As temperature increases, dissolved oxygen decreases.

• As temperature decreases, dissolved oxygen decreases.

• A change in temperature has no effect on dissolved oxygen.

Tags

NGSS.MS-LS1-5

If a large amount of fertilizer enters a lake, which will most likelyhappen?

• The fish population in the lake will increase.

• The temperature of the lake water will increase.

• The number of fish dying in the lake will increase.

• he available food supply for the fish in the lake will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which would be the most likely cause of large numbers of fish dying in a stream?

• a lack of nitrogen

• high levels of mercury

• decreased carbon dioxide

• low dissolved oxygen concentration

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which best explains why the turbidity increases as water samples are taken closer to the shore?

• Shoreline erosion causes sediment to wash into the lake.

• Sediment is carried from the middle of the lake to the shore by wind.

• Swimmers stir up sediment by splashing in the water near the shore.

• Fish stir up sediment while feeding on plants that grow close to the shore.

Which would MOST LIKELY result in an unhealthy aquatic habitat?

• a decrease in turbidity

• a decrease in nitrates levels

• an increase in water temperature

• an increase in dissolved oxygen levels

Tags

NGSS.MS-LS2-4

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

• 0

• 7

• 10

Which best explains why a scientist would use nets to capture and count organisms in a river?

• to measure pH

• to measure turbidity

• to measure biodiversity

• to measure temperature