I can't see the well but chemical changes happen when a substance combines with another to form a new substance. These processes are called chemical reactions and are not reversible except if you do more chemical reactions... So the well that is changing it's state of matter should be the one undergoing a chemical change. For, example boiling or freezing
Chloroplast has evolved from photosynthetic bacteria
D is correct. Cool air sinks, which forces warm air to rise.
Convection is when warm material rises and cool material sinks
Hope it helps
Answer:
The muscles cells and their body cell
Germs are those organisms that can cause diseases.
<h3>What are germs?</h3>
The term germs have to do with the harmful pathogenic organisms that are able to cause diseases in the bodies of individuals.
The following are true about germs;
- An uninfected person may be able to fight off the infection before getting sick and passing it on to others.
- Just because people meet does not mean that they will make contact.
Learn more about germs:brainly.com/question/9594756
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