Answers: 3
Biology, 22.06.2019 10:10
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?
Answers: 1
Biology, 22.06.2019 10:40
Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above
Answers: 1
Biology, 22.06.2019 19:00
What’s a example of extrusive rock that cooled to quickly for grains to form
Answers: 1
Biology, 22.06.2019 20:30
What methods do scientists use to predict volcanic eruptions? select all that apply
Answers: 1
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