Elements of Living Organisms Answers

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1
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What is the basic unit of matter?

A
atom
B
molecule
C
gas
D
compound
2
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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.
3

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

A
matter
B
rock
C
compound
D
element
4

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).
5

Which organisms transform nitrogen to a form that is useful to plants?

A
bacteria
B
animals
C
fungi
D
humans
6

Which is one of the six fundamental elements that are found in living organisms?

A
helium
B
sodium
C
oxygen
D
chlorine
7

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.
8

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
9

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

A
sulfur
B
oxygen
C
hydrogen
D
phosphorus
10

A new organism is discovered at the bottom of the ocean. A scientist is determining the composition of elements found in the tissues of the organism. Which elements will most likely be found?

A
carbon, hydrogen, nitrogen, and oxygen
B
carbon, nitrogen, aluminum, and gold
C
silver, gold, argentum, and sulfur
D
carbon, nitrogen, oxygen, and argentum

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