What makes a molecule polar?

Unequal sharing of valence electrons

Equal sharing of valence electrons

Temporary charges that come and go

Which of the following properties of water enables molecules to cling together as they move from the roots to the leaves of plants?

Water exhibits cohesive behavior.

Large bodies of water do not quickly fluctuate, or change, in temperature. Why?

Water has a high heat capacity.

Some insects can stand on the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

The insects are light enough so they do not break the hydrogen bonds holding the water molecules together

The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Why does water move from the roots to the leaves of plants?

Capillary action pulls the water molecules like a chain.

Water’s cohesion causes it to “pull” towards the leaves.

As water freezes, it expands and its density decreases.

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

In an isotonic solution which way will the water flow

it will flow both ways at equal rates

water moves from high to low concentration

large or oddly shaped molecules move across a cell membrane

water moves when energy is used

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?

The water in the gums has moved out due to the high concentration of salt in the solution.

The swollen gums have absorbed the saltwater solution.

The saltwater solution lowers the temperature of the water in the gums.

The salt in the solution has moved against the concentration gradient.

Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together

The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet

The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

A florist places a bouquet of white carnations in water containing blue dye. After a time, the flowers turn blue. What process helped the carnations to change color?

Cohesion and adhesion of water molecules

Formation of covalent bonds between hydrogen and oxygen molecules

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

Water has a high capacity for heat.

Water exhibits strong cohesion.

. Water has an unusual crystalline structure.

Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

Water expands and becomes less dense when it freezes.

Water absorbs heat when it evaporates and forms a gas

Water molecules completely separate into ions in solutions.

Water forms hydrogen bonds with ions and other polar substances.

AP Biology 1.1 Water

11th - 12th Grade

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33 Qs

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AP Biology 1.1 Water

Quiz

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Biology

•

11th - 12th Grade

•

Practice Problem

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Medium

•

NGSS

HS-ESS2-5, MS-PS1-4, MS-PS1-2

Standards-aligned

Penny Dunning

Used 59+ times

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33 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The smaller an animal is...

The smaller the surface area to volume ratio

The larger the surface area to volume ratio

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Smaller animals generally have a ______ metabolism

Higher

Lower

Which type of chemical bond is formed when electrons are shared and is a stronger bond that is not easily broken?

Ionic bond

Covalent bond

Hydrogen bond

Van der Waals force

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of water property explains water's ability to stick to other material.

Cohesion

Surface tension

Adhesion

High specific heat

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A material is hydrophobic, that means it...

Doesn't mix with water or dissolve in water easily

Mixes with water or dissolves in water easily

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Evaporative cooling

Cools down an animal's body

Cools down the environment

Cools down both an animal's body and the environment

Water is...

Polar

Nonpolar

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AP Biology 1.1 Water

33 questions

The smaller an animal is...

Smaller animals generally have a ______ metabolism

Which type of chemical bond is formed when electrons are shared and is a stronger bond that is not easily broken?

Which type of water property explains water's ability to stick to other material.

A material is hydrophobic, that means it...

Evaporative cooling

Water is...

What makes a molecule polar?

Water molecules require a lot of energy to break the hydrogen bonds. This gives water a high

Because water has a positively charged end and a negatively charged end, it can be described as

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