SC 7 N 1 2

Dana wants to test whether turning a compost pile twice works better than turning it once. How many compost piles does she need?

• 1

• 2

• 3

• as many as possible

How many variables should be tested at one time?

• 1

• 2

• 3

• as many as you want

Randy places a piece of metal in 3 different acids and water. Why does he need the water?

• to compare the affect of acids to it.

• to see what happens to the metal.

• to see how acid rain affects the metal.

• to compare the affect of the acids on the metal.

Colleen wants to find out if watering plants more often produces more leaves. What is the test variable?

• number of leaves

• number of plants

• amount of plant growth

• amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Colleen wants to find out if watering plants more often produces more leaves. What is the outcome variable?

• the number of leaves

• the number of plants

• the amount of plant growth

• the amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Other than scientific experiments, what other methods do scientists use to investigate problems?

• Models, Observations, & Research

• Models, Observation, & Replication

• Models, Repetition, & Replication

• Models, Repetition, & Variables

Tags

NGSS.MS-PS2-5

Science determines results based on _____________________.

• Rumor

• Hypothesis

• Evidence

• Popular opinion

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-1

NGSS.HS-PS1-2

Scientists sometimes change their views. For example, people once believed that Pluto was a planet. What causes these changes in thinking?

• new experiments

• new evidence or interpretations

• new scientific beliefs

• new theories develop

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Which one is a limitation of a drawing but not a model of the cell?

• it does represent the main parts of a cell

• it does not contain the correct number of nuclei

• it cannot represent a true cell which is 3 dimensional

• it cannot represent a true cell since the cytoplasm should be in constant motion

Tags

NGSS.MS-LS1-2

How can you differentiate between repetition and replication?

• both provide accurate results

• repetition provides accurate results and replication merely provides more data

• repetition is when someone else uses your procedure to repeat the experiment and replication is when you repeat the experiment.

• repetition is when you repeat the experiment and replication is when someone else uses your procedure to repeat the experiment