Answer:
i know 3, reproduction, organisms, and variations in traits
Explanation:
there's no question on here
make or become hot or warm is heating.
cooling is to become colder or cool down from a higher temp.
Answer:
True
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
