John wants to see if the amount of cheese affects how long it takes a rat to complete a maze. What is the independent, dependent, and constant variable?

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

Which of these conditions most likely produces an unstable isotope?

What type of matter is made of only one kind of atom