Use Mohs' hardness scale to answer the following question
Mohs Hardness Scale
softer
0
fingernail
Talc
Gypsum
Calcite
Fluorite
glass
Apatite
Orthoclase
Quarta
Topas
O
nal
1651
Corundum
Diamond
10
harder
Turquoise has a hardness of about 6 Which two materials could turquoise
Scratch
A Gypsum
B. Quartz
Ос, Apatite
D. Topal

Me 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?