25 points
1)state what is meant by the term physical change,
2)state what is meant by the term internal energy,
3)state what is meant by the term specific latent heat.

pshyical change is a usually reversible change of a substance, as size or shape: Freezing a liquid is a physical change. Compare chemical change.

internal change is when the movement of the particles increases

specific latent heat is the amount of energy per kg (unit mass) required to change ice to water without change in temperature.

a 2,000 calorie based diet.