How many variables should you change in a controlled experiment?

one

two

four

as many as possible

What is refraction? what does it mean when we say that light is refracted as it enters the eye?

Is Animal Action physical or chemical weathering

Describe the location and the length of the incision you will make in the earthworm

What role does gravity play in mass movement

If a star of 50 solar masses were to supernova. It would most likely become a

What can fish color tell us about human pigmentation? skin color is often one of the first traits people notice in each other. studies in zebra fish uncovered a mutation that altered a transport protein and resulted in light-colored fish.

Which of the following best describes the relationship between human population size and resource use?

How does climate affect the type of biome found in an area?

As in the previous question, suppose there is a population of 100 rabbits that have different fur patterns. In this population several generations ago, there were 60 FF rabbits, 20 Ff rabbits, and 20 ff rabbits.

How can introducing a plant or animal from one ecosystem into another ecosystem cause major problems