Which of the following statements is true of nuclear fusion? a. it must take place at extremely high temperatures. b. it must take place in low-density containers. c. it results in nuclei that are lighter in weight than the nuclei that existed before the reaction. d. it does not release a great amount of energy.

Which characteristics are typical of a human population in the postindustrial stage?

What is the genotype of the male circled in pink? ο χου lo xay xaya done answer was xay

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?