SC 6 N 1 1

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

How many variables should be changed in an experiment?

• ONE

• TWENTY

• THREE

• TEN

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-LS2-4

Which method is best for determining scientifically which of two fertilizers is most effective for raising tomato plants?

• Treat two different varieties of tomato plants individually with the different fertilizers and measure their growth and appearance. Compare differences in the growth of individual plants.

• Apply one type of fertilizer to a group of similar tomato plants and apply a different type of fertilizer to a different group of similar tomato plants and compare the growth and appearance of both groups.

• Use one type of fertilizer on a group of different varieties of tomato plants and measure their growth and appearance. Compare their growth to a group of plants that were not treated with the fertilizer.

• Mix the two types of fertilizers and apply the mixture to one variety of tomato plants and measure their growth and appearance. Compare their growth and appearance to a group of tomato plants that were not treated with the mixture.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-LS1-5

NGSS.MS-LS2-4

A group of students investigate the effect of carbon dioxide on plant height. The students grow plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the test variable (independent variable) in this experiment?

• height of each plant after a period of time

• amount of carbon dioxide in each container

• amount of air in each container

• amount of water provided to the plants

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Eddie wants to determine if different colored boxes produce the same temperature inside as a white box. He places white, black, and red boxes of the same size in the sunlight. A thermometer is placed inside each box. He observes and records the temperatures in the boxes throughout the day. What is the test variable (independent variable) in this investigation?

• size of the boxes

• repeated trials

• color of the boxes

• recorded temperatures

Tags

NGSS.MS-PS1-4

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

What is the primary purpose of a control group in an experiment?

• To provide a standard for comparison

• To introduce new variables

• To ensure the experiment is biased

• To increase the sample size

Which of the following is a characteristic of a good scientific hypothesis?

• It is vague and open-ended

• It is testable and falsifiable

• It is based on personal beliefs

• It is a proven fact

Tags

NGSS.MS-LS2-4