Plants use sunlight energy to take carbon dioxide and water molecules are rearrange them to make oxygen gas and glucose, which stores the energy (battery). Animals/humans
"burn" the glucose using oxygen, and then we help to recycle the carbon dioxide and
water when we breathe out.
So why does the sun have to keep supplying more energy? Why isn't the energy also
recycled when the atoms are recycled?

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?