Alright kiddo! So, let's talk about two types of Earth, the greenhouse and icehouse Earth.
Firstly, Greenhouse Earth is named after a greenhouse because it works like a greenhouse, a place where plants grow. Just like the glass walls in a greenhouse trap heat inside, the Earth's atmosphere traps heat from the sun. This makes Earth warm enough for us to live, and much of the heat is kept in by gases called "greenhouse gases." These gases, like carbon dioxide and methane, help to regulate the temperature of the Earth by trapping some of the sun's heat.
On the other hand, Icehouse Earth is named for the time periods when Earth was VERY cold, and most of the planet was covered in ice, except for some tropical regions. During this time, there were colder and drier climates, and the polar regions had large glaciers. This happened a long time ago and continued for a very long time.
Now, why do we have greenhouse and icehouse Earths? Over time, the Earth's climate changes naturally. This is due to a variety of factors, such as how close the Earth is to the Sun, the amount of energy that the Sun provides, and even the shape of the Earth's orbit around the Sun.
Modern human activity is also believed to be contributing to a warming of the Earth - this is connected to the Greenhouse Earth concept. Humans release a lot of gases that contribute to the greenhouse effect, which means the Earth is getting warmer. It's important to take care of the planet so that we don't cause more damage to the environment!
So that's a very simple explanation of greenhouse and icehouse Earths, kiddo!