Snow melts in the sun.

Meaning: When the sun shines on snow, the snow turns into water.

Choice of Words: Snow is the white stuff that falls from the sky when it is cold. Melts means to change from a solid to a liquid. In means inside or surrounded by something. The is used to refer to a specific thing. Sun is the big, bright thing in the sky that gives us light and heat.

Alternative Expressions

The snow turns into water when the sun shines.

Meaning: This means the same thing as the first sentence, but it uses different words to explain it.

Choice of Words: Snow is a cold, white stuff that falls from the sky in winter. Turns into means to change into something else. Water is a liquid that we drink and use to wash things. Sun is a big, hot ball of gas that gives us light and heat. Shines means to give off light. When you put them together, "The snow turns into water when the sun shines" means that the snow changes into water when it gets warm from the sun.

When it's warm outside, the snow melts.

Meaning: This means the same thing as the first two sentences, but it uses even simpler words to explain it.

Choice of Words: Warm means not cold. Outside means not inside a building. Melts means to change from a solid to a liquid. Snow is a cold, white stuff that falls from the sky in winter. When you put them together, "When it's warm outside, the snow melts" means that the snow turns into water when it gets warm outside.

Related Expressions