Question

Identify each of the following as a physical or chemical change.
21 You leave your bicycle out in the rain and it rusts
A sugar cube dissolves.
Scientist break-up water into one and hydrogenas
Burning coal for a barbecue,
Trimming a bush because it has grown to all​

Answer 1

Answer:

Explanation:

physical:-

a sugar cube dissolves

Trimming a bush because it has grown to all​

chemical:-

You leave your bicycle out in the rain and it rusts

Scientist break-up water into oxygen and hydrogenas

Burning coal for a barbecue