Question

which of the following is an example of a 1 point physical change?
a) burning wood
b) melting ice
c) rusting iron
d) baking a cake
what is the main difference between a * 1 point physical change and a chemical change?
a) a physical change creates new substances, but a chemical change does not.
b) a chemical change can be easily reversed, while a physical change cannot.
c) a physical change affects the appearance of a substance, while a chemical change alters its composition.
d) both changes involve the creation of new substances.
which of the following is a chemical * 1 point change?

Explanation:

For the first question, melting ice only changes the state of water from solid to liquid without forming new substances, which is a physical change. Burning wood, rusting iron, and baking a cake all involve chemical reactions that result in new substances.
For the second question, a physical change affects the state, shape, or appearance of a substance without changing its chemical composition, while a chemical change leads to the formation of new substances with different chemical properties.
For the third - question part (incomplete here), a chemical change is one that forms new substances.

Answer:

1. b) Melting ice
2. c) A physical change affects the appearance of a substance, while a chemical change alters its composition.