Exploring the Scientific Method

One group of people is sprayed with Bug Spray #1, another group with Bug Spray #2, and third group with Bug Spray #3. One group doesn’t wear any bug spray. Each of the groups go outside for 6 hours and the number of bug bites on each person is recorded.

What is the independent variable?

• group with no bug spray

• type of bug spray

• number of bug bites

• 6 hours outside

One group of people is sprayed with Bug Spray #1, another group with Bug Spray #2, and third group with Bug Spray #3. One group doesn’t wear any bug spray. Each of the groups go outside for 6 hours and the number of bug bites on each person is recorded.

What is the dependent variable?

• group with no bug spray

• type of bug spray

• number of bug bites

• 6 hours outside

One group of people is sprayed with Bug Spray #1, another group with Bug Spray #2, and third group with Bug Spray #3. One group doesn’t wear any bug spray. Each of the groups go outside for 6 hours and the number of bug bites on each person is recorded.

What is the control group?

• group with no bug spray

• type of bug spray

• number of bug bites

• 6 hours outside

You water three sunflower plants with salt water. Each plant receives a different amount of salt in the water. A fourth plant receives regular water. After two weeks the height is measured.

What is the independent variable?

• two weeks

• regular water

• different amounts of salt in the water

• height of the plants

Tags

NGSS.MS-LS2-1

You water three sunflower plants with salt water. Each plant receives a different amount of salt in the water. A fourth plant receives regular water. After two weeks the height is measured.

What is the dependent variable?

• two weeks

• regular water

• different amounts of salt in the water

• height of the plant

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

You water three sunflower plants with salt water. Each plant receives a different amount of salt in the water. A fourth plant receives regular water. After two weeks the height is measured.

What is the control group?

• two weeks

• regular water

• different amounts of salt in the water

• height of the plant

Tags

NGSS.MS-LS2-1

Three redwood trees are kept at different humidity levels in greenhouses for 12 weeks. One is left outside in normal conditions. The trees’ heights are measured once a week.

What is the independent variable?

• different humidity levels

• once a week

• tree height

• tree left outside

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Three redwood trees are kept at different humidity levels in greenhouses for 12 weeks. One is left outside in normal conditions. The trees’ heights are measured once a week.

What is the dependent variable?

• different humidity levels

• once a week

• tree height

• tree left outside

Tags

NGSS.MS-LS1-5

Three redwood trees are kept at different humidity levels in greenhouses for 12 weeks. One is left outside in normal conditions. The trees’ heights are measured once a week.

What is the control group?

• different humidity levels

• once a week

• tree height

• tree left outside

Tags

NGSS.MS-ETS1-1

One tank of goldfish is fed the normal amount of food once a day. A second is fed twice a day. A third is fed four times a day. The fish’s weights are recorded daily.

What is the independent variable?

• fish's weights

• how many times a day the fish are fed

• recorded daily

• fish fed once a day

Tags

NGSS.MS-LS2-1