Jawaban:

1. A mixture of sand and water

2. Frying and egg

3. A solution is made up of one or more solutes dissolved in a solvent

Penjelasan:

1. When sand is mixed with water, no new subtance is formed. You can get the sand and water back by filtration. Mixing sand with water can be reversed. Such a change is called A Reversible Change.

2. Heat changes the egg into something different. The fried egg look, smell, and taste diferent from the raw egg. We cannot get the raw egg back after boiling or frying it. Hence, the changes are Irreversible

3. Some solids can dissolve in water to form solutions. For example, copper sulfate dissolves in water to form copper sulfate solution. The solute is copper sulfate and the solvent is water.