Yellowstone Fires - A Story of Succession How much of Yellowstone burned in 1988?

What management practices led to Yellowstone being so vulnerable to wildfires?

What did scientists do to see how Yellowstone recovered?

What type of Ecological Succession is exemplified by the video - Primary Succession of Secondary Succession?

What features survived the fires?

Why were those features that you identified in number 5 important for the ecosystem's recovery?

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?