AnswersGA-GSE Biology AElements of Living Organisms

Elements of Living Organisms Answers

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Which element is considered the most versatile element in living organisms and why?

A
hydrogen, because it provides most of the mass of human bodies
B
hydrogen, because it can be found in both organic and inorganic molecules
C
carbon, because it can bond with many elements to form complex molecules
D
carbon, because it provides strength to the important protein, keratin
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Which is the central element for all living things?

A
carbon
B
hydrogen
C
oxygen
D
nitrogen
3

Where is the best place to find information about the hazards that are associated with a compound?

A
Look in a lab hazard log in the classroom.
B
Read a website about toxic substances.
C
Ask a classmate or friend.
D
Read a Material Safety Data Sheet (MSDS).
4

The most abundant element in the atmosphere can also be found in

A
white sugar and soy protein.
B
fruits and hydrogenated oils.
C
carbonated water and glucose.
D
beans and whey protein.
5

Which of these elements is found in both carbohydrates and water?

A
carbon
B
oxygen
C
nitrogen
D
helium
6

Before using any chemical in the lab, why should one first read the Material Safety Data Sheet (MSDS)?

A
The MSDS provides information on safe handling of the chemical.
B
The MSDS explains where the chemical can be purchased.
C
The MSDS provides the chemical formula for the substance.
D
The MSDS describes how the chemical will react with other substances.
7

Which element provides strength to the exoskeletons of clams and oysters?

A
sulfur
B
oxygen
C
hydrogen
D
phosphorus
8

Which statement correctly describes glucose (C6H12O6)?

A
It is made of matter and contains twenty-four molecules.
B
It is an element made of three types of atoms.
C
It is an atom made up of carbon, hydrogen, and oxygen.
D
It is a compound made of twenty-four total atoms.
9

Which term describes a pure substance that is made up of only one type of atom?

A
matter
B
rock
C
compound
D
element
10

Which substance is a compound?

A
water
B
gold
C
oxygen
D
hydrogen

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