threats to the environment
gases like carbon dioxide that trap heat in the earth atmosphere
green house gases mean
energy made from natural sources that never run out like sun or wind
renewable energy
This planet is known as the “Red Planet” because of its iron-rich soil
mars
“This force keeps you stuck to the Earth.”
gravity
naturals fuel such as oil coal that are used for energy
fossil fuels
the act of planting trees to rebuild the forest
reforstation
This animal can sleep for up to 3 years if conditions are too dry or cold.
snail
“This gas makes up about 78% of Earth’s atmosphere.”
nitrogen
total amount of greenhouse gases released by group or activity
carbon footprint
wind turbines
tall structure with blades that spin with the wind to generate electricity
This ancient wonder of the world, located in Egypt, is the only one still standing today.
Pyramid
“This is the only planet in our solar system that rotates on its side.”
uranus