What best explains why a person can become sunburned by spending too much time at the beach? Sunlight is an electromagnetic wave that gains energy as it travels through air to reach the person.
Sunlight is an electromagnetic wave carrying energy that is absorbed by the skin.
Sunlight is a mechanical wave that vibrates the skin particles to produce heat.
O Sunlight is a mechanical wave, and its frequency matches the natural frequency of skin to make heat.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !