Choosing Best Material - 2nd Grade Science
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What should you compare to decide the best material when all materials were tested the same way?
What should you compare to decide the best material when all materials were tested the same way?
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The test results for each material. Fair tests let you compare results directly between materials.
The test results for each material. Fair tests let you compare results directly between materials.
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What is one rule for fair testing before using results as evidence?
What is one rule for fair testing before using results as evidence?
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Change only one thing and keep others the same. This ensures differences come from materials, not test conditions.
Change only one thing and keep others the same. This ensures differences come from materials, not test conditions.
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Which option is the strongest evidence: “I like it,” “It held $10$ coins,” or “It seems fine”?
Which option is the strongest evidence: “I like it,” “It held $10$ coins,” or “It seems fine”?
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It held $10$ coins. Specific numbers provide measurable proof, not personal feelings.
It held $10$ coins. Specific numbers provide measurable proof, not personal feelings.
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Which material should you choose if the goal is strongest bridge and it held $12$ blocks vs $7$ blocks?
Which material should you choose if the goal is strongest bridge and it held $12$ blocks vs $7$ blocks?
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The material that held $12$ blocks. More blocks held means stronger material for bridge building.
The material that held $12$ blocks. More blocks held means stronger material for bridge building.
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Which material should you choose if the goal is most absorbent and it soaked up $30$ mL vs $10$ mL?
Which material should you choose if the goal is most absorbent and it soaked up $30$ mL vs $10$ mL?
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The material that soaked up $30$ mL. Higher volume absorbed shows better absorbent properties.
The material that soaked up $30$ mL. Higher volume absorbed shows better absorbent properties.
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Which material should you choose if the goal is least absorbent and it soaked up $5$ mL vs $20$ mL?
Which material should you choose if the goal is least absorbent and it soaked up $5$ mL vs $20$ mL?
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The material that soaked up $5$ mL. Lower volume absorbed means material repels liquid better.
The material that soaked up $5$ mL. Lower volume absorbed means material repels liquid better.
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Which material should you choose if the goal is best insulator and it kept water warm for $15$ min vs $8$ min?
Which material should you choose if the goal is best insulator and it kept water warm for $15$ min vs $8$ min?
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The material that kept water warm for $15$ min. Longer warmth retention indicates superior insulation ability.
The material that kept water warm for $15$ min. Longer warmth retention indicates superior insulation ability.
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Which material should you choose if the goal is fastest to dry and it dried in $3$ min vs $9$ min?
Which material should you choose if the goal is fastest to dry and it dried in $3$ min vs $9$ min?
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The material that dried in $3$ minutes. Shorter drying time meets the goal of quick drying.
The material that dried in $3$ minutes. Shorter drying time meets the goal of quick drying.
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Which sentence is better evidence: “It is strong” or “It held $9$ books without bending”?
Which sentence is better evidence: “It is strong” or “It held $9$ books without bending”?
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It held $9$ books without bending. Specific measurements prove strength better than general claims.
It held $9$ books without bending. Specific measurements prove strength better than general claims.
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Which conclusion matches the data: A held $4$ N, B held $6$ N, goal is strongest material?
Which conclusion matches the data: A held $4$ N, B held $6$ N, goal is strongest material?
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Choose material B. Higher force resistance ($6$ N > $4$ N) indicates greater strength.
Choose material B. Higher force resistance ($6$ N > $4$ N) indicates greater strength.
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Identify the best evidence for choosing a flexible material for a bracelet.
Identify the best evidence for choosing a flexible material for a bracelet.
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It bent easily without cracking during the bending test. Bending without breaking shows flexibility needed.
It bent easily without cracking during the bending test. Bending without breaking shows flexibility needed.
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What property are you testing if you count how many coins a material holds before ripping?
What property are you testing if you count how many coins a material holds before ripping?
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Strength (how much weight it can hold). Counting coins measures load-bearing capacity.
Strength (how much weight it can hold). Counting coins measures load-bearing capacity.
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Which conclusion matches the evidence: Material A held $8$ coins; Material B held $11$ coins.
Which conclusion matches the evidence: Material A held $8$ coins; Material B held $11$ coins.
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Choose Material B for holding more weight. B held more coins (11 > 8), showing greater strength.
Choose Material B for holding more weight. B held more coins (11 > 8), showing greater strength.
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Which statement correctly uses evidence: “I chose wood because it is best” or “I chose wood because it did not bend”?
Which statement correctly uses evidence: “I chose wood because it is best” or “I chose wood because it did not bend”?
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“I chose wood because it did not bend”. Specific test results provide objective evidence.
“I chose wood because it did not bend”. Specific test results provide objective evidence.
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What should you keep the same in a fair “drop test” when comparing two materials?
What should you keep the same in a fair “drop test” when comparing two materials?
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Same height, same object dropped, same landing surface. Controls ensure only material type affects results.
Same height, same object dropped, same landing surface. Controls ensure only material type affects results.
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