Why might a scientist repeat an experiment?

To produce more data, so they know the experiment is correct.

She is bored, and wants to do extra work.

His mom made him, because he wasn't following directions.

"Will plants grown in light grow taller than those in darkness?" This is an example of

Stating the question or problem

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What is the dependent variable?

the amount of air in the balloon

an identical balloon kept at room temperature

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What factor is held constant?

the amount of air in the balloon

an identical balloon kept at room temperature

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What would be a control for this experiment?

an identical balloon kept at room temperature

the amount of air in the balloon

Mrs. Cote wanted to know if the iPhone could stand up against being dropped from different heights. She dropped them from 3 heights and saw if they broke. What is the independent variable?

If they had a case on them or not

Lilly was trying to explain to her friend the difference between a theory and a law in science. She used the theory of plate tectonics and the law of superposition as examples. Lilli explained the difference by using non-scientific language. Which statement could Lilly use to correctly describe the difference between a theory and a law in science?

A theory explains a natural event, while a law describes it.

A theory describes a natural event, while a law explains it.

A theory explains a natural event, while a law predicts it.

A theory predicts a natural event, while a law explains it.

Scientific theories are based on

large amounts of data collected over time.

general assumptions of how systems work.

mathematical principles that can be proven true.

observations from within only one scientific discipline.

Which of these contains steps in the right order?

Ask a question, research, state your hypothesis, experiment, analyze, make a conclusion, communicate results

Ask a question, state your hypothesis, research, experiment, analyze, make a conclusion, communicate results

State your hypothesis, ask a question, research, experiment, analyze, make a conclusion, communicate results

State your hypothesis, ask a question, research, make a conclusion, experiment, analyze

Why do we want to test one variable at a time?

To know what is causing the changes. This helps us understand cause and effect.

Because it is hard to setup a data table with more

It is what has always been done

Some researchers are developing a new fertilizer designed to improve the growth of plants in hot, dry climates. The fertilizer was applied to one hundred desert plants in a greenhouse. The average daytime temperature in the greenhouse was 90°F, and the humidity levels were low. Which is best for the researchers to do next?

A compare plants that received fertilizer to similar plants that received none

B begin selling the fertilizer to gardeners living in hot, dry climates

C change the conditions in the greenhouse and retest the fertilizer

D test the fertilizer on plants that are adapted to cooler climates

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground. What is the dependent variable?

Amount of time it takes the helicopter to hit the floor

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground. What is the independent variable?

Amount of time it takes the helicopter to hit the floor

What would the INDEPENDENT variable be in an experiment testing which paper airplane design goes furthest?

the distance of each plane's flight

Goggles are worn in the laboratory

D. any time chemicals, heat, or glassware are used.

C. only if you don’t have corrective glasses.

Long hair in the laboratory must be

tied back or kept entirely out of the way with a hair band

held away from the experiment with one hand

When you finish working with chemicals, biological specimens, and other lab substances, always

wash your hands thoroughly with soap and water

treat your hands with skin lotion

long sleeves and loose clothing should be rolled up

closed toe shoes should be worn

long hair should be pulled back

When working in the lab, you always...

work with only members of your group with a business-like attitude

ask questions when in doubt about procedures

UNIT 1 SCIENCE AS A PROCESS

Authored by Michelle Daniels

Biology

12th Grade

50 Questions

NGSS covered

Used 5+ times

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Content View

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During this step you look for any information about the Testable Question you can find.

conclusion

experiment

hypothesis

background research

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You will collect and record this during an experiment.

data

conclusion

hypothesis

background research

Tags

NGSS.MS-LS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This data characteristic refers to how close your measurement is to the true or actual measurement.

precision

sloppiness

accuracy

closeness

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

One of these must explicitly state the Independent Variable and Dependent Variable.

conclusion

"I wonder…?"

manipulated variable

testable question

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This is your prediction about how the Dependent Variable in an experiment will respond to changes in the Independent Variable.

conclusion

"I wonder…?"

manipulated variable

hypothesis

Tags

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Independent Variable is tested to see if it is the ___.

cause

effect

conclusion

control

Tags

NGSS.MS-LS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Dependent Variable is observed to see if it is a/an ___.

cause

effect

conclusion

control

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

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UNIT 1 SCIENCE AS A PROCESS

During this step you look for any information about the Testable Question you can find.

You will collect and record this during an experiment.

This data characteristic refers to how close your measurement is to the true or actual measurement.

One of these must explicitly state the Independent Variable and Dependent Variable.

This is your prediction about how the Dependent Variable in an experiment will respond to changes in the Independent Variable.

The Independent Variable is tested to see if it is the ___.

The Dependent Variable is observed to see if it is a/an ___.

A possible explanation to a problem that has not yet been tested.

The summary at the end of an experiment that explains the results.

Why might a scientist repeat an experiment?

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