I need help with this
...
Answers: 3
Biology, 22.06.2019 09:40
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?
Answers: 1
Biology, 22.06.2019 10:00
The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.
Answers: 1
Biology, 22.06.2019 10:00
An animal cell (left) and a plant cell (right) are shown.which organelle, labeled x in the diagram, is found in both plant and animal cells?
Answers: 1
Biology, 22.06.2019 10:30
Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.
Answers: 1
Mathematics, 06.03.2020 21:39
History, 06.03.2020 21:39
Mathematics, 06.03.2020 21:39
English, 06.03.2020 21:39
Physics, 06.03.2020 21:39
Mathematics, 06.03.2020 21:39
Engineering, 06.03.2020 21:39
Mathematics, 06.03.2020 21:39
Mathematics, 06.03.2020 21:39