Explaining Interaction Strength - 3rd Grade Science
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What does interaction direction describe in a cause-and-effect relationship?
What does interaction direction describe in a cause-and-effect relationship?
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Which way the effect changes when the cause changes. Direction shows if cause and effect move together or opposite.
Which way the effect changes when the cause changes. Direction shows if cause and effect move together or opposite.
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Identify the direction: If the cause decreases and the effect increases, what direction is shown?
Identify the direction: If the cause decreases and the effect increases, what direction is shown?
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Negative direction (decrease–increase). Opposite changes = negative.
Negative direction (decrease–increase). Opposite changes = negative.
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What does interaction strength describe when comparing two interactions?
What does interaction strength describe when comparing two interactions?
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How big the effect is (weak, moderate, or strong). Strength measures how much the effect changes.
How big the effect is (weak, moderate, or strong). Strength measures how much the effect changes.
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Which observation best shows a strong interaction: small change or large change in results?
Which observation best shows a strong interaction: small change or large change in results?
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Large change in results. Strong interactions produce big changes.
Large change in results. Strong interactions produce big changes.
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Which observation best shows a weak interaction: big change or tiny change in results?
Which observation best shows a weak interaction: big change or tiny change in results?
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Tiny change in results. Weak interactions produce small changes.
Tiny change in results. Weak interactions produce small changes.
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Identify the direction: If the cause increases and the effect increases, what direction is shown?
Identify the direction: If the cause increases and the effect increases, what direction is shown?
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Positive direction (increase–increase). Both increase together = positive.
Positive direction (increase–increase). Both increase together = positive.
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Identify the direction: If the cause increases and the effect decreases, what direction is shown?
Identify the direction: If the cause increases and the effect decreases, what direction is shown?
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Negative direction (increase–decrease). One up, one down = negative.
Negative direction (increase–decrease). One up, one down = negative.
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Identify the direction: If the cause decreases and the effect decreases, what direction is shown?
Identify the direction: If the cause decreases and the effect decreases, what direction is shown?
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Positive direction (decrease–decrease). Both decrease together = positive.
Positive direction (decrease–decrease). Both decrease together = positive.
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Which option is the best evidence of a cause: repeated results or a single result?
Which option is the best evidence of a cause: repeated results or a single result?
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Repeated results. Multiple trials confirm patterns.
Repeated results. Multiple trials confirm patterns.
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What should be kept the same to make observations a fair test when studying an interaction?
What should be kept the same to make observations a fair test when studying an interaction?
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All variables except the one being changed. Control variables ensure fair comparison.
All variables except the one being changed. Control variables ensure fair comparison.
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Which option identifies the cause in an investigation: the changed factor or the measured result?
Which option identifies the cause in an investigation: the changed factor or the measured result?
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The changed factor. The cause is what you manipulate.
The changed factor. The cause is what you manipulate.
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Which option identifies the effect in an investigation: the changed factor or the measured result?
Which option identifies the effect in an investigation: the changed factor or the measured result?
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The measured result. The effect is what responds to change.
The measured result. The effect is what responds to change.
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Identify the interaction direction: More sunlight leads to taller plants. What direction is shown?
Identify the interaction direction: More sunlight leads to taller plants. What direction is shown?
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Positive direction. Both variables increase together.
Positive direction. Both variables increase together.
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Identify the interaction direction: More shade leads to shorter plants. What direction is shown?
Identify the interaction direction: More shade leads to shorter plants. What direction is shown?
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Negative direction. Variables change in opposite ways.
Negative direction. Variables change in opposite ways.
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Identify the direction from data: Cause goes $3 \to 6$ and effect goes $8 \to 2$. What direction is shown?
Identify the direction from data: Cause goes $3 \to 6$ and effect goes $8 \to 2$. What direction is shown?
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Negative direction. Cause increases while effect decreases.
Negative direction. Cause increases while effect decreases.
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