Keesha did an experiment to study the rate of photosynthesis in the water plant elodea. she placed a piece of elodea in a beaker of water and set the beaker 10 centimeters (cm) from a light source. keesha counted the bubbles released from the plant every minute for five minutes (min). she repeated the process two more times. first, she moved the light to 20 cm from the beaker, and then she moved the light to 30 cm from the beaker. what is the outcome variable (dependent variable) in this experiment? what is the key phrase that tells you what you are looking for?

What is the outcome variable in this experiment?

The dependent variable which is the outcome of bubbles produced.

Keesha did an experiment to study the rate of photosynthesis in the water plant Elodea.

My guess would be that since we initially know what the experiment is for, the key phrase is:

Keesha counted the bubbles released from the plant every minute for five minutes (min). She repeated the process two more times.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.