Correct Answer: 1. It evaporated
Explanation:
When you leave a glass of water in the sun, especially for two days, the heat from the sun provides energy to the water molecules. This energy causes the water molecules to move faster and escape into the air as water vapor — a process called evaporation.
Let’s go through the other options:
2. It condensed –
Condensation is the opposite of evaporation. It happens when water vapor turns back into liquid — like when it forms droplets on a cold surface. That’s not what’s happening in your scenario.
3. It froze –
Freezing occurs when water turns to ice. But you placed the glass in the sun, where temperatures are too warm for freezing.
4. It turned into nitrogen –
Water is made of hydrogen and oxygen (H₂O), not nitrogen. Water cannot simply turn into nitrogen — that would require a nuclear reaction, which doesn’t happen just by leaving it in the sun.
So, the water evaporated — it turned into vapor and escaped into the air. That’s why the glass is empty