Question

please answer these two questions​

Answer 1

Answer:

On cooling a substance, the constituent particles such as the molecules come close and the overall result is the object being contracted.

When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%.

Answer 2

Answer:

A1.Because the kinetic energy decreases, so the atoms take up less space and the material(substance) contracts.

A2 . A block of ice is solid water. When heat (a form of energy) is added, the ice melts into liquid water. It has reached its melting point at 0°C.

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