Covalent bonds are formed when two atoms are able to <em>share</em> electrons.
Iroinic bonds are form when two atoms are <em> </em> electrons from each other to complete the bond. This results in a pair of ions.
<u>Covalent bonds:</u>
- Have a definite shape.
- Have a low melting point.
- At room temperature they are in a liquid or gas.
- They occur between two non-metals.
<u>Ionic bonds:</u>
- Have no definite shape.
- Have a high melting point.
- At room temperature they are solid.
- They occur between a metal and a nonmetal.
<span> ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos. Those are the 5 pieces of evidence of Evolution.</span>
Hey!
The water cycle is driven by solar energy, see solar energy is what makes water evaporate, which needs to happen for precipitation to happen, and precipitation reaches earth in hail, snow, or rain which will run-off into oceans and evaporate or just eventually evaporate.
So, yes, solar.
Jupiter has a greater mass, but Earth is more dense
If you want what it does it protects the cells from its surroundings, It's made of embedded proteins I believe. Hope that helped please answer my question.