Which is a controlled variable in this experiment?

A. number of pots

B. amount of water

C. amount of phosphate

D. amount of blooms on a plant

Which of the following correctly compares frementation and cellular respiration

In the 1920's Hubble observed that galaxies appeared to be heading away from the Earth in all directions. True False

In bohrs model of the atom which of the following is true A) Electrons travel in defined circular orbits around the nucleus like planets orbiting the sun. B) Each orbit has a certain amount of energy associated with it.

Definition: These are the components of the reservoirs of oxygen that are exchanged in our environment.

An experiment is set up to determine if wheat grows better when it is planted by itself or together with clover. The setup involves 3 pans of each treatment. Set-up A, B and C contain wheat alone.

Discuss the social and biological construction of race in the United states.

From what material is the block made

When water freezes, how does the ice compare to the liquid water? The ice has a greater mass and a greater volume than the water. The ice has the same mass but greater volume than the water. The ice has less mass and less volume than the water.

Angus is accused of having a restriction of range problem in his evaluations of coworkers. what is most likely to be true about angus?

Why might it be advantageous to use nonrenewable resources over renewable resources?