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.
A. Consumers cannot produce their own food source so they have to eat other animals.
C. Rhizobia bacteria "prepare" the atmospheric nitrogen and make it useful for the plant.
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Happy homework/ study/ exam!
In biology the three domains are Archaea, the Bacteria, and the Eukarya.
If the Independent Variable, then the Dependent Variable:
Your IV is how safe/supportive your design for your egg is
Your DV is what you believe/want the outcome to be after you drop the egg
So (an example could be):
If the structure of the apparatus that holds the egg is built of inflated balloons, then the egg will not crack when it is dropped.