When heat is added to a substance, the molecules and atoms vibrate faster. Solids, liquids and gases all expand when heat is added. When heat leaves all substances, the molecules vibrate slower. The atoms can get closer which results in the matter contracting.
Plasma membrane is described as Semi permeable because it selects what molecules enter/exit the cell which is important in maintaining homeostasis.
Answer:
1: Carbon Dioxide
2: oxygen
3: Oxygen
4: water
these are what I think but there's a very high chance I'm wrong, sorry
I think the answers is the first one
All the planets orbit around the sun.
