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Grade 2 Science · World 5: Hot & Cold Kitchen · Level 35
Kitchen Evidence
Use observations as evidence to sort changes and explain them.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 35
- Scientists use evidence: what they observe. Maya melted chocolate, then cooled it. It got hard again. That's evidence the change can be undone.
- Leo cooled a cooked egg in the fridge. It stayed cooked. That's evidence that cooking an egg can't be undone.
- A class put the same size ice cube in three places, and timed how long each one took to melt.
- The sunny spot was warmest, so that ice melted fastest. The data is evidence: more heat means faster melting.
- Try it with a grown-up! Put one ice cube in the sun and one in the shade. Which melts first? Then try melting and cooling a chocolate chip.
Georgia Standards of Excellence in Science:
- S2P1.c — Provide evidence from observations to construct an explanation that some changes in matter caused by heating or cooling can be reversed and some changes are irreversible. (Changes in matter could include heating or freezing of water, baking a cake, boiling an egg.)