ACT Science

Practice session

Experiment 26: A researcher tests the effectiveness of three types of insulators (foam, fiberglass, cellulose) by measuring the temperature of water in identical containers after 2 hours in a 0°C environment. Initial water temperature: 70°C. Insulator | Final Temperature (°C) Foam | 58 Fiberglass | 52 Cellulose | 47 No insulation (control) | 24 Which insulator is most effective, and how does the researcher know?

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