Answer:
an exposure to a virus is actually having the virus and developing an immunity to a virus is similar because to be immune to a virus you have to receive a vaccine and a vaccine is actually the disease injecting into your system in a different way so when the virus attacks you your body cells know what to do to fight the disease.
Explanation:
Answer:
When a solid object is heated, it expands. This happens because the atoms in the object start vibrating or moving faster.
Explanation:
<u><em>If you need a longer explanation, let me know! If not, I hope I helped. </em></u>
I think co 2 maybe
I cant remember
What your question is unclear?
