Rebecca has samples of different types of metal. She wants to find out the density of each metal. First, she measures the samples' volumes. Now she needs to measure the samples' masses. Which of the following tools should she use to make her measurements?

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.

What happens when two nitrogen atoms share electrons

Select the word from the list that best fits the definition apparent movement of a star used to measure its distance from earth