with my study guide. you will get 20 points: (only answer if u know)
·how do continental glaciers move?
·a farmer uses weeds and stalks from her previous year's crops to plow her field. what type of soil conservation technique is she using?
·what is a ridge that forms when till is deposited at the end of a glacier?
·how does wind primarily cause erosion?
·what forms when sediment is blown against an obstacle and settles behind it?
·what is the composition of the a horizon?
·how does soil loose its value?

80 points pls brainliest 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?