What is the main source of energy?

What is formed when light energy gathered by green plants is changed into chemical energy?

What is a herbivore?

What is a carnivore?

What are the three most important gasses needed to sustain life?

How are carbon dioxide and oxygen recycled through the environment?

Roughly how much of our bodies are made up of water

Is Solar Energy a renewable source of energy?

How to plants and animals use glucose?

How are soils made?

What type of sand is made with large particles?