1. The grass (to get) wet when it (to rain).2. If you (to heat) ice, it (to melt).3. If you (to mix) green and blue, you (not to get) purple.4. If public transport (to be) efficient, people (to stop) using their cars.5. If people (to eat) too much, they (to get) fat.6. People (to die) if they (not to eat).7. You (to get) water if you (to mix) hydrogen and oxygen.8. Snakes (to bite) if they (to be) scared9. If babies (to be) hungry, they (to cry).

1. The grass gets wet when it rains.
- When it rains, water falls from the sky and lands on the grass, making it wet.
- This is a cause and effect relationship, as the action of raining directly leads to the result of the grass getting wet.

2. If you heat ice, it melts.
- When you apply heat to ice, the ice absorbs the heat and turns into water.
- This is a cause and effect relationship, as the action of heating directly leads to the result of the ice melting.

3. If you mix green and blue, you do not get purple.
- When you mix green and blue, the colors will combine to create a different shade of blue, rather than purple.
- This is stating that green and blue do not have the necessary primary colors to create the color purple.

4. If public transport is efficient, people will stop using their cars.
- When public transport is efficient and provides a convenient and reliable way of transportation, people will prefer to use it instead of their cars.
- This is a cause and effect relationship, as the condition of efficient public transport directly leads to the result of people no longer using their cars.

5. If people eat too much, they get fat.
- When people consume excessive amounts of food, their bodies store the excess energy as fat, leading to weight gain.
- This is a cause and effect relationship, as the action of eating too much directly leads to the result of becoming fat.

6. People die if they do not eat.
- If individuals do not consume food over an extended period, their bodies will not have the necessary nutrients and energy to function properly, eventually leading to death.
- This is stating that the absence of food can have severe consequences on a person's health and survival.

7. You get water if you mix hydrogen and oxygen.
- When you combine hydrogen and oxygen in the right proportions, a chemical reaction occurs that results in the formation of water.
- This is stating that the combination of hydrogen and oxygen produces the compound known as water.

8. Snakes bite if they are scared.
- When snakes feel threatened or scared, they may respond by biting as a form of defense.
- This is a cause and effect relationship, as the feeling of fear in snakes directly leads to the action of biting.

9. If babies are hungry, they cry.
- When babies experience hunger, they communicate their need for food by crying.
- This is a cause and effect relationship, as the condition of being hungry directly leads to the action of crying.