Answer:
The second one, "Interactions of substances between living things and the earth."
Explanation:
1. Physical changes are changes affecting the form of a chemical substance, but not it’s chemical composition.
2. A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances.
—— remember a physical change you can see the desperate piece in a mix, such as a salad. A chemical change is when you cannot, like if you mix to salad dressings together, you cannot pick them apart again.—-
3. States that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
4. ^^^ example after question 2.
5. Chemical - you cannot reverse the change — separate the two salad dressings — physical- you can pick pieces apart — you can remove the tomatoes from the lettuce in a salad.
6. The majority of the log has been turned to ash, therefore making most of it into a gaseous form, which is irreversible and much lighter.
7. All are chemical. Those are all changes you cannot reverse.
8. Once you burn a paper into nothing, you cannot reverse the change and make it into paper again.
9. This would still be a physical change. The pieces are only separated, but the object did not chemically change.
Hope this helped!!
Yes it is because population has increased in 200 years a lot
Answer:
metals
Explanation:
Most of the Elements are Metals Non-metal are the 2th most and metalloids are the less
Different animals have different adaptations due to their habitat, which help them survive. For example, the camel located in deserts have 2 humps where fat is stored which can be metabolised for energy.
