Dependent and Independent Variables

What is a hypothesis in scientific experiments?

• A hypothesis is a guess about the outcome of an experiment.

• A hypothesis is a testable prediction about the relationship between the independent and dependent variables.

• A hypothesis is a statement that cannot be tested.

• A hypothesis is a conclusion drawn from experimental data.

If you are testing how different types of soil affect plant growth, what is the independent variable?

• The amount of water given to the plants.

• The type of soil.

• The size of the pots used for planting.

• The number of plants in each pot.

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In an experiment, if you change the amount of sunlight a plant receives, what is the independent variable?

• The amount of water the plant receives.

• The type of soil used for planting.

• The amount of sunlight.

• The temperature of the environment.

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

• To manipulate the independent variable

• To serve as a standard for comparison

• To increase the sample size

• To eliminate all variables

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NGSS.MS-PS2-2

In an experiment, if you measure how tall a plant grows based on different amounts of water, what is the dependent variable?

• The amount of water given to the plant.

• The type of plant used in the experiment.

• The height of the plant.

• The time taken for the plant to grow.

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NGSS.MS-LS1-5

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In a study about how different brands of batteries affect how long a toy runs, what is the dependent variable?

• The type of battery used.

• The amount of time the toy runs.

• The brand of the toy.

• The age of the toy.

How can you determine if your hypothesis is supported?

• By analyzing the data collected from the experiment and seeing if it aligns with your prediction.

• By ignoring the data and relying on intuition.

• By conducting the experiment multiple times without recording results.

• By asking peers for their opinions on the hypothesis.

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What is the difference between qualitative and quantitative data?

• Qualitative data involves numbers and measurements, while quantitative data describes characteristics or qualities.

• Qualitative data describes characteristics or qualities, while quantitative data involves numbers and measurements.

• Qualitative data is always more accurate than quantitative data.

• Quantitative data is subjective, while qualitative data is objective.

If you are measuring how many pages a student reads based on the time they spend reading, what is the dependent variable?

• The time spent reading

• The number of pages read

• The student's reading speed

• The difficulty of the reading material

What is a dependent variable?

• A variable that is manipulated in an experiment.

• A factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

• A constant that remains unchanged throughout the experiment.

• A variable that does not affect the outcome of the experiment.

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NGSS.MS-PS2-2

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