5.1 Physical Properties of Water

Identify the charge of the oxygen side in a water molecule.

• negatively charged.

• positively charged.

• neutral.

• depends on the temperature.

Identify the charge of the hydrogen side in a water molecule.

• positively charged.

• negatively charged.

• neutral.

• no charge.

Which bond causes water molecules to stick together?

• Hydrogen bonds cause water molecules to stick to each other (cohesion).

• Ionic bonds cause water molecules to stick to each other.

• Covalent bonds cause water molecules to stick to each other.

• Metallic bonds cause water molecules to stick to each other.

Define Cohesion.

• The attraction between water molecules due to hydrogen bonding.

• The process of water evaporating from leaves.

• The ability of water to dissolve various substances.

• The movement of water through plant stems.

Define Photic Zone.

• The upper layer of the ocean where sunlight penetrates, allowing photosynthesis to occur.

• The deepest part of the ocean where no light reaches.

• A zone in the ocean where only red light penetrates.

• The area of the ocean floor covered by sand and rocks.

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How does surface tension help plankton in the ocean?

• Surface tension helps plankton remain in the photic zone.

• Surface tension allows plankton to sink quickly.

• Surface tension provides nutrients to plankton.

• Surface tension helps plankton avoid predators.

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The ocean appears blue because:

• it reflects the blue sky.

• water absorbs colors in the red part of the light spectrum.

• it contains blue algae.

• it is a reflection of the blue sky.

The SOFAR channel is:

• a deep sound channel in the ocean where low-frequency sound waves can travel long distances

• a television channel dedicated to ocean documentaries

• a type of marine animal found in the deep sea

• a method of measuring ocean salinity

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Label the atoms that make up one water molecule

b

c

oxygen

phosphorus

carbon

hydrogen

nitrogen

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Which part of a water molecule has a Positive Charge?

• The Hydrogen

• The Oxygen

• The Top

• The Bottom

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