Life Science CFE Review 2024

A student wants to perform a science experiment about plants. He wants to know if a certain type of soil will make plants grow taller. Each pot will receive a different type of soil, but will get the same type of seed, water amount, and sunlight amount.What is the Independent Variable in this story?

• Amount of sunlight

• How tall the plant will grow

• Amount of water

• Type of material the plant is growing in

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NGSS.MS-LS1-5

What do you measure for results (outcome)?

• Dependent variable

• Hypothesis

• Experimental Group

• Constants

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Why is it important to have constants in an experiment?

• To make sure the experiment is fair

• Constants are not needed for experiments.

• To measure the dependent variables all at once

• To test many variables at a time

This bar graph shows the number of cheeseburgers sold at McYummies drive thru last week. Study the graph and answer the following question.

What was the maximum number of burgers sold, and on which day was this?

• 30 burgers on Tuesday

• 60 Burgers on Thursday

• 20 Burgers on Thursday

• 25 Burgers on Monday

Why do many experiments include several trials instead of a single trial?

• Repetition of trials increases the accuracy of the results

• Repetition of trials decreases the sample size of the experiment.

• Repetition of trials makes data easier to analyze.

• It is not necessary to repeat trials

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1. Aside from repeating a scientific experiment, what else must a scientist do to increase the accuracy of the results?

• Change the hypothesis

• Share data with other scientists for them to repeat or replicate

• Analyze the data faster

• Keep the data for themselves

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NGSS.HS-PS1-3

Anna is in charge of studying how the amount of plant food (fertilizer) affects the height of a plant at a local garden. Which testable statement does she investigate?

• There is no way to test this hypothesis.

• If a plant receives two cups of food per day, then the height of the plant will increase

• If a plant gets different amounts of water and two cups of food per day, the height of the plant will increase

• If a plant receives more sunlight, the height of the plant will decrease

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How is a hypothesis different from a theory?

• A theory has evidence to back it up and a hypothesis is an educated guess as to what is going to happen.

• They are both the same. They both are guesses as to what happens in the natural world.

• A theory is an opinion about how something works but a hypothesis has scientific evidence to support it.

• A hypothesis is used in science and a theory is used in society.

A statement that describes what scientists expect to happen every time under a particular set of conditions is a

• scientific inquiry

• scientific hypothesis

• scientific theory

• scientific law

Jonathan and Renier dropped a rubber ball from the same height onto six different surfaces.  They measured the height of each bounce and recorded their data.  The graph shows their data.  Based on the data, which of the following is the best conclusion?

• All balls bounce higher indoors than they do outdoors.
• The surface has no affect on the height of the bounce.
• A rubber ball does not bounce as high as a super ball.
• A rubber ball bounces higher on harder surfaces.

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