NGSS.3-5-ETS1-3

When conducting an experiment, in order to get reliable results, it is important to:

• Disregard results that do not match your hypothesis
• Test many different variables at the same time
• Test all forces at the same time
• Repeat the investigation several times

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NGSS.3-5-ETS1-3

How many variables should be changed in an experiment?

• ONE
• TWENTY
• THREE
• TEN

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NGSS.3-5-ETS1-3

The students measure how far the toy car rolls on the floor. What should the students do to determine if their results are reliable?

• Roll different toy cars down the ramps for three trials.
• Roll the same toy cars using ramps with five books and six books.
• Roll the same toy car down the ramp for three trials.
• Roll different toy cars using ramps with five books and six books.

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NGSS.3-5-ETS1-3

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

• Because it is hard to setup a data table with more than one variable
• To better identify what is causing the changes
• It is what has always been done
• It's easier to perform the experiment

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NGSS.3-5-ETS1-3

A student observes that the craters on the moon are different sizes. The student designs an experiment to study the formation of craters. The materials for the experiment are marbles and a pan of flour. The student makes a hypothesis that the size of the craters made on the surface of the flour will depend on the height from which the marble is dropped. Some of the steps in the student's experiment are described in the picture. Which of these is most likely Step 3 in the student's experiment? (5.6D)

• Drop the same marble from different heights into the pan of flour

• Drop marbles of different masses from the same height into the pan of flour

• Drop marbles of different sizes from different heights into the pan of flour

• Drop a single marble one time into the pan of flour

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NGSS.3-5-ETS1-3

Is something that is kept the same, remaining unchanged in an experiment.

• Control

• Variable

• Data

• P, B, & J

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NGSS.3-5-ETS1-3

Is a procedure carried out under controlled conditions to test a hypothesis.

• Science

• Watching YouTube

• Experiment

• Hypothesis

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NGSS.3-5-ETS1-3

What's the fifth step in the Engineering Design process?

• Identify your constraints

• Discuss what can work better and improve your design

• Gather your needed materials

• Follow the plan and test it out

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NGSS.3-5-ETS1-3

Bonita wondered - Will adding mass to a paper helicopter cause it to stay in the air longer? In her experiment, the helicopter with no additional mass is considered the

• dependent variable

• control

• a boring helicopter

• hidden variable

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NGSS.3-5-ETS1-3

Scott grew four basil plants by putting them in a mixture of water and fertilizer. He wanted to find out if growing the plants this way could make them grow taller than plants that grow in the ground. How should Scott set up a control group for his experiment?

• He should grow four basil plants in soil.

• He should grow four tomato plants in water and fertilizer.

• He should use different amounts of fertilizer for each plant.

• He should grow some plants in warm water and some in cold water.

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NGSS.3-5-ETS1-3