A group of four students are investigating how gravity affects balls of different sizes. Each student brings in their favorite ball. Each student then stands on a table or desk in the classroom and drops the ball from as high up as they can reach. The time it takes to reach the ground is measured. Is this a good experiment? A. Yes, this is a good experiment.
B. No, gravity cannot be investigated by dropping objects.
C. No, they should only drop two objects for best results.
D. No, there are too many things changing in this experiment.

Which process of living things produces water that enters the water cycle

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?

1. which of the following transport mechanisms utilizes energy? a. osmosis b. diffusion c. facilitated diffusion d. endocytosis