this graph shows the change in temperature of a sample of water in a closed system as thermal energy is added over time. what happens to the temperature of the water during changes of state? A. it falls sharply B. it increases gradually C. it remains the same D. it decreases gradually

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Avariable that is not being directly tested during an experiment should be