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WorksheetsChemistry of Life Ch. Test
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
Substances are changed into different substances when bonds break and form during
a)
chemical equilibrium
b)
chemical reactions
c)
ion formation
d)
hydrogen bonding
2.
Atoms in molecules share pairs of electrons when they make
a)
ionic bonds
b)
covalent bonds
c)
hydrogen bonds
d)
polymers
3.
Which of the following is formed when an atom gains or loses electrons?
a)
element
b)
ion
c)
compound
d)
molecule
4.
Both animal fats and plant oils are made up of glycerol and
a)
phospholipids
b)
fatty acids
c)
polar molecules
d)
saturated fats
5.
Identify the products in this reaction:
6H20 + 6C02 yields __________ C6H1206+602
6H20 + 6C02 yields __________ C6H1206+602
a)
6H20 and 6C02
b)
6C02 and C6H1206
c)
C6H1206 and 602
6.
The smallest basic unit of matter is the
a)
molecule
b)
atom
c)
compound
d)
cell
7.
What gives water many properties that are important to living things?
a)
temperature
b)
hydrogen bonds
c)
density
d)
specific heat
8.
Which of the following solutions has the highest H+ ion concentration?
a)
a solution with a pH of 1
b)
a solution with a pH of 4
c)
a solution with a pH of 7
d)
a solution with a pH of 10
9.
The activation energy needed for a chemical reaction is decreased by a
a)
catalyst
b)
reactant
c)
product
d)
substrate
10.
What is unique about carbon?
a)
bonding properties
b)
ability to bond with oxygen
c)
properties as a reactant
d)
properties as an enzyme
11.
The four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and
a)
starches
b)
fatty acids
c)
monosaccharides
d)
proteins
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