Testing Forces and Motion - 3rd Grade Science
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Which tool is best to measure the time an object moves in a test?
Which tool is best to measure the time an object moves in a test?
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Stopwatch or timer. These devices precisely track elapsed time.
Stopwatch or timer. These devices precisely track elapsed time.
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Which option is the best conclusion if the car travels less distance on carpet than tile?
Which option is the best conclusion if the car travels less distance on carpet than tile?
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Greater friction on carpet slows the car more. Different surfaces create different amounts of friction.
Greater friction on carpet slows the car more. Different surfaces create different amounts of friction.
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Identify the independent variable: You use the same car but test on wood, carpet, and tile.
Identify the independent variable: You use the same car but test on wood, carpet, and tile.
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Surface type. What you change (surface) is the independent variable.
Surface type. What you change (surface) is the independent variable.
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Find the dependent variable: You change ramp height and measure how far the car rolls.
Find the dependent variable: You change ramp height and measure how far the car rolls.
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Distance the car rolls. What you measure (distance) is the dependent variable.
Distance the car rolls. What you measure (distance) is the dependent variable.
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Which option is the best way to increase reliability in a force-and-motion investigation?
Which option is the best way to increase reliability in a force-and-motion investigation?
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Repeat trials and average or compare the results. Multiple trials reduce errors and show consistent patterns.
Repeat trials and average or compare the results. Multiple trials reduce errors and show consistent patterns.
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Identify the best data to record to test whether a bigger push changes motion.
Identify the best data to record to test whether a bigger push changes motion.
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Distance traveled for each push strength. Distance shows how push strength affects motion.
Distance traveled for each push strength. Distance shows how push strength affects motion.
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Which option correctly states what to do first when planning a force-and-motion investigation?
Which option correctly states what to do first when planning a force-and-motion investigation?
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Write a testable question about force and motion. A clear question guides the entire investigation.
Write a testable question about force and motion. A clear question guides the entire investigation.
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Identify the best way to compare friction using the same toy car on two surfaces.
Identify the best way to compare friction using the same toy car on two surfaces.
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Keep the push the same and change only the surface type. Controls push force so surface is the only variable.
Keep the push the same and change only the surface type. Controls push force so surface is the only variable.
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Which option describes gravity in a motion investigation?
Which option describes gravity in a motion investigation?
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A force that pulls objects toward Earth. This invisible force affects all objects near Earth.
A force that pulls objects toward Earth. This invisible force affects all objects near Earth.
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What is friction in an investigation about forces affecting motion?
What is friction in an investigation about forces affecting motion?
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A force that resists motion between touching surfaces. Rough surfaces create more friction than smooth ones.
A force that resists motion between touching surfaces. Rough surfaces create more friction than smooth ones.
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What unit is appropriate for measuring time in a motion investigation?
What unit is appropriate for measuring time in a motion investigation?
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Seconds (s). Standard unit for measuring duration of events.
Seconds (s). Standard unit for measuring duration of events.
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What unit is appropriate for measuring distance in a classroom investigation?
What unit is appropriate for measuring distance in a classroom investigation?
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Centimeters (cm) or meters (m). These metric units work well for small to medium distances.
Centimeters (cm) or meters (m). These metric units work well for small to medium distances.
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Which tool is best to measure the distance an object travels in a test?
Which tool is best to measure the distance an object travels in a test?
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Ruler or meter stick. These tools have marked units for measuring length.
Ruler or meter stick. These tools have marked units for measuring length.
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What is a hypothesis in a force-and-motion investigation?
What is a hypothesis in a force-and-motion investigation?
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A testable prediction about how force will affect motion. States what you think will happen before testing.
A testable prediction about how force will affect motion. States what you think will happen before testing.
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What is one clear way to make a force-and-motion test fair?
What is one clear way to make a force-and-motion test fair?
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Change only one variable and keep all others the same. This ensures results are due to the tested variable only.
Change only one variable and keep all others the same. This ensures results are due to the tested variable only.
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