What evidence do scientists have that proves that the universe is expanding?

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

Describe how a student should adjust the microscope to see the cells on a slide more clearly?