Mining activities can help acquire minerals like coal, which provide energy. Howevermining activities are also harmful for the environment. The table below shows the number of major sinkholes formed in a mining location from 1990 to 1998 Between 1990 and 1992
Between 1992 and 1994
Between 1996 and 1998
Between 1994 and 1996

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?