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Biology Chapter 1-9

First Semester Final

QuestionAnswer
What is a covalent bond? a strong chemical bond where electrons are shared. This type of bond is harder to break.
What is an element? a pure amount of one kind of atom. ie, oxygen and carbon dioxide.
Four main elements that make up the body are... Carbon, oxygen, hydrogen, and nitrogen
What is a Ionic bond? a weak chemical bond holding together 2 or more atoms. This type of bond is easy to break
What two elements combine to make water (H20? Hydrogen and oxygen
List the complete levels of organizatioon in order from the smallest group to the largest. Biosphere...Ecosystems...community...population...organism..Groups of cells...cells... molecules
What is poplulation density? The number of individuals living in an area.
Created by: JenniBrochu
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