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WorksheetsIntro to Water Test
Total questions: 24
Worksheet time: 18mins
What percentage of the Earth's surface is covered by water?
25%
50%
75%
100%
Life on Earth likely began in the oceans.
True
False
A water molecule is formed when an oxygen atom covalently bonds with (a) hydrogen molecules.
Bond formed by the sharing of electrons.
(a)
Slightly negative O- attracted to slightly positive H+ of nearby water molecule.
(a)
Dissolving agent (liquid)
(a)
Dissolved substance.
(a)
Solvent + Solute.
(a)
Water is called the universal solvent because it can dissolve a wide range of substances
True
False
Oils and lipids dissolve easily in water.
True
False
How many bonds can a water molecule (H2O) form?
1
2
3
4
Hydrophobic substances, like oils and lipids, do not (a) easily in water.
Write the following substances to their classification: Sugar
(a)
Write the following substances to their classification: Salt
(a)
Write the following substances to their classification: Oils
(a)
Write the following substances to their classification: Lipids
(a)
What is the primary reason that life likely began in water?
Water is the only liquid on Earth.
Water provides a stable environment for biochemical reactions.
Water is the most abundant gas in the atmosphere.
Water prevents the formation of covalent bonds.
How many hydrogen molecules does an oxygen atom covalently bond with to form a water molecule?
1
2
3
4
What property of water helps regulate temperature on Earth?
Low specific heat capacity
High specific heat capacity
Inability to form hydrogen bonds
Lack of cohesion
In a hydrogen bond, what is attracted to the slightly positive hydrogen atom of a nearby water molecule?
Another hydrogen atom
A slightly negative oxygen atom
A positively charged ion
A negatively charged ion
What does hydrophobic mean in relation to substances in water?
They dissolve easily.
They are repelled by water.
They form strong bonds with water.
They have a high affinity for water
Which of the following substances is hydrophilic?
oils
lipids
salt
none of the above
How many bonds can a water molecule (H2O) form with other molecules?
(a)
What is the main reason why water is considered the universal solvent?
It dissolves only organic compounds.
It has a low specific heat capacity.
It can dissolve a wide range of substances.
It forms weak bonds with other molecules.
