Answer:
The independent variable are the vitamins .
The dependent variable are the rats.
Explanation:
The vitamins are the independent variable because they are are controllable. You can control how many vitamins the rats will be given.
The lake on titan was evaporated, it evaporated because at that time titan was going through summer.
13-13= 0, 19-13= 6, so then 0-6= -6
Answer:
Ionic compounds
Explanation:
Ionic crystals are hard and brittle and have high melting points.
The answer to this is mechanic energy.