Write zero conditional sentences.
1 you heat ice (it/melt)
If you heat ice, it melts.
2 you eat a lot of junk food (you/put on weight)
3 you mix red and white (you/get pink)
4
you freeze water (it/turn to ice)
5
you go out in the rain (you/get wet)

1. If you heat ice, it melts. This is a zero conditional sentence because it expresses a general truth or a fact that is always true. When ice is heated, it always melts.

2. If you eat a lot of junk food, you put on weight. This is also a zero conditional sentence because it expresses a cause and effect relationship that is always true. When you eat a lot of junk food, the result is always weight gain.

3. If you mix red and white, you get pink. This is a zero conditional sentence because it expresses a result that is always true when a specific action is performed. When you mix red and white colors together, the result is always pink.

4. If you freeze water, it turns to ice. This is a zero conditional sentence because it describes a cause and effect relationship that is always true. When water is frozen, it always changes into ice.

5. If you go out in the rain, you get wet. This is also a zero conditional sentence because it expresses a general truth or a fact that is always true. When you go out in the rain, you always get wet.

In zero conditional sentences, the if-clause states a condition or an action that always leads to a result expressed in the main clause. These sentences are used to talk about general truths, scientific facts, or habitual actions. The verb tense in both clauses is usually in the present simple tense because the condition and the result are always true.