The image shows the magnetic polarity involved in seafloor spreading. Which feature is the arrow pointing to?

https://cdn. app. edmentum. com/EdAssets/e0db99d2f9914efda035de 5be375f1ed?ts=636280920060800000

A.
youngest rock with normal polarity
B.
oldest rock with normal polarity
C.
youngest rock with reversed polarity
D.
oldest rock with reversed polarity
E.
middle-aged rock with no polarity

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

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?

The smallest parts of these that retain their original properties are called