Explaining Motion Results - 3rd Grade Science
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What does it mean to keep variables controlled (a fair test) in motion tests?
What does it mean to keep variables controlled (a fair test) in motion tests?
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Keep everything the same except one changed factor. Controls ensure valid comparisons.
Keep everything the same except one changed factor. Controls ensure valid comparisons.
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Identify the dependent variable in an investigation measuring car distance.
Identify the dependent variable in an investigation measuring car distance.
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Distance the car travels. The variable you measure as a result.
Distance the car travels. The variable you measure as a result.
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Choose the evidence-based conclusion: Rough surface caused less distance than smooth surface. What force increased?
Choose the evidence-based conclusion: Rough surface caused less distance than smooth surface. What force increased?
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Friction increased. Rough surfaces create more resistance.
Friction increased. Rough surfaces create more resistance.
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Identify the supported claim: Ramp height increased, average distance increased. What changed the motion?
Identify the supported claim: Ramp height increased, average distance increased. What changed the motion?
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Increasing ramp height increased the distance traveled. Higher ramps give more gravitational pull.
Increasing ramp height increased the distance traveled. Higher ramps give more gravitational pull.
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Identify the independent variable in an investigation changing ramp height.
Identify the independent variable in an investigation changing ramp height.
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Ramp height. The variable you change on purpose.
Ramp height. The variable you change on purpose.
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Which evidence best supports the claim that an object moved slower?
Which evidence best supports the claim that an object moved slower?
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It traveled less distance in the same time. Less distance means lower speed.
It traveled less distance in the same time. Less distance means lower speed.
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Which tool is most appropriate to measure distance traveled in a motion test?
Which tool is most appropriate to measure distance traveled in a motion test?
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Ruler, meter stick, or measuring tape. Measures length in standard units.
Ruler, meter stick, or measuring tape. Measures length in standard units.
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Which evidence best supports the claim that an object moved faster?
Which evidence best supports the claim that an object moved faster?
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It traveled more distance in the same time. Greater distance means higher speed.
It traveled more distance in the same time. Greater distance means higher speed.
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What is the formula for speed when using distance and time?
What is the formula for speed when using distance and time?
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$\text{speed} = \frac{\text{distance}}{\text{time}}$. Distance divided by time gives rate.
$\text{speed} = \frac{\text{distance}}{\text{time}}$. Distance divided by time gives rate.
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What is the best definition of speed for 3rd grade science?
What is the best definition of speed for 3rd grade science?
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Speed is how fast something moves. Rate of position change over time.
Speed is how fast something moves. Rate of position change over time.
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What is a reference point used for when describing motion?
What is a reference point used for when describing motion?
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A place or object used to compare an object’s position. Helps determine if position changed.
A place or object used to compare an object’s position. Helps determine if position changed.
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What is the best definition of motion in science?
What is the best definition of motion in science?
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Motion is a change in position over time. Position changes as time passes.
Motion is a change in position over time. Position changes as time passes.
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Find the speed: An object travels $8\text{ m}$ in $4\text{ s}$. What is its speed?
Find the speed: An object travels $8\text{ m}$ in $4\text{ s}$. What is its speed?
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$2\text{ m/s}$. Speed = $\frac{8\text{ m}}{4\text{ s}} = 2\text{ m/s}$.
$2\text{ m/s}$. Speed = $\frac{8\text{ m}}{4\text{ s}} = 2\text{ m/s}$.
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Find the speed: A toy car travels $12\text{ m}$ in $3\text{ s}$. What is its speed?
Find the speed: A toy car travels $12\text{ m}$ in $3\text{ s}$. What is its speed?
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$4\text{ m/s}$. Speed = $\frac{12\text{ m}}{3\text{ s}} = 4\text{ m/s}$.
$4\text{ m/s}$. Speed = $\frac{12\text{ m}}{3\text{ s}} = 4\text{ m/s}$.
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Choose the correct conclusion: Same ramp, Car A $4\text{ m}$ in $2\text{ s}$; Car B $6\text{ m}$ in $2\text{ s}$. Which was faster?
Choose the correct conclusion: Same ramp, Car A $4\text{ m}$ in $2\text{ s}$; Car B $6\text{ m}$ in $2\text{ s}$. Which was faster?
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Car B was faster. B traveled $6\text{ m}$ vs A's $4\text{ m}$ in same time.
Car B was faster. B traveled $6\text{ m}$ vs A's $4\text{ m}$ in same time.
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