Water Structure and Properties

1.

Multiple Choice

2 mins

1 pt

What word describes when water is attracted to other substances?

cohesion

adhesion

capillary action

surface tension

2.

Multiple Choice

2 mins

1 pt

Attractions between water molecules are called

Covalent bonds

Ionic bonds

Polar bonds

Hydrogen bonds

3.

Multiple Choice

3 mins

1 pt

Water is polar because...

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.

The molecule has two poles, at which the it is colder than other regions of the molecule.

The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

The water molecule is neutral.

4.

Multiple Choice

2 mins

1 pt

Why does ice float?

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.

5.

Multiple Choice

2 mins

1 pt

Which end of the water molecule has a slightly positive charge?

the oxygen end

the hydrogen end

both ends are slightly positive

neither end is positive

6.

Multiple Choice

2 mins

1 pt

Water is a universal solvent because it...

It can be found anywhere

It freezes when it gets cold

floats when frozen

Dissolves most substances

7.

Multiple Choice

2 mins

1 pt

Which types of compounds dissolve easily in water?

Polar and Nonpolar

Polar and Ionic

Nonpolar and Ionic

Covalent and Nonpolar

8.

Multiple Choice

2 mins

1 pt

What property of water helps to moderate earth's temperature?

adhesion

chohesion

Specific heat capacity

Latent heat of vaporization

9.

Multiple Choice

30 sec

1 pt

What is the chemical formula of water?

H2O

H202

HO

10.

Multiple Choice

30 sec

1 pt

What is surface tension?

an elastic film on the surface of the water caused by hydrogen bonds

an elastic band that holds all the water together

the tightness at the bottom of the water

an elastic film on the surface

11.

Multiple Choice

30 sec

1 pt

Due to its polarity, water doesn't mix with ____________ substances like _____________.

polar; oil

polar; salts

Non-polar; oil

Non-polar; salts

12.

Multiple Choice

30 sec

1 pt

When water moves up a piece of paper, or up a tree against gravity, it is displaying the property of water known as

Adhesion

Capillary action

Cohesion

Density

13.

Multiple Choice

30 sec

1 pt

What is the correct chemical formula for water?

H₂O

HO₂

H₂O₂

₂H₁O

14.

Multiple Choice

30 sec

1 pt

Which of the following is an example of COHESION?

water sticking to water

water sticking to glass

oil sticking to plastic

hydrogen sticking to oxygen

15.

Multiple Choice

30 sec

1 pt

Water is polar. What does that mean?

it is a molecule with opposite charges on opposite ends

it is a molecule with no charge

it is a molecule with identical charges on opposite ends

it is a molecule with too many protons

16.

Multiple Choice

30 sec

1 pt

Water sticks well to many materials. What term relates to this property of water?

cohesion

adhesion

density

surface tension

17.

Multiple Choice

30 sec

1 pt

What is the term for water's ability to defy gravity and climb up a tube?

Capillary Action

Specific Heat

Universal Solvent

Magic

18.

Multiple Choice

30 sec

1 pt

Why does ice float?

water expands when it freezes, making ice less dense than water

water compacts when it freezes, making ice more dense than water

hydrogen bonds in water push the ice to the surface

ice is afraid of water, and avoids it

19.

Multiple Choice

2 mins

1 pt

molecule in which opposite ends have opposite electric charges

cohesion

polar molecule

hydrogen bond

solution

20.

Multiple Choice

2 mins

1 pt

Water is a universal solvent because it...

It can be found anywhere

It freezes when it gets cold

floats when frozen

Dissolves most substances

21.

Multiple Choice

2 mins

1 pt

Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?

adhesion

surface tension

solvent properties

nonpolar

22.

Multiple Choice

30 sec

1 pt

Which of the following is the correct molecular structure for water, H₂O?

23.

Multiple Choice

30 sec

1 pt

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

Water is a solvent.

Water has a high heat capacity.

Water acts as a buffer.

Water is non-polar.

24.

Multiple Choice

30 sec

1 pt

Water striders can walk across 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

25.

Multiple Choice

30 sec

1 pt

Which is NOT a unique property of water?

Frozen water floats on liquid water.

Water covers most of the Earth’s surface and retains a large amount of heat.

Water molecules stick to each other through hydrogen bonds.

Water cools very rapidly.

26.

Multiple Choice

30 sec

1 pt

Which part of a water molecule has a Positive Charge?

The Hydrogen

The Oxygen

The Top

The Bottom

27.

Multiple Choice

30 sec

1 pt

Which part of a water molecule has a Negative Charge?

The Hydrogen

The Oxygen

The Left

The Right

28.

Multiple Choice

30 sec

1 pt

Which of the following can water NOT dissolve?

Salt

Sugar

Oil

Baking Soda

29.

Multiple Choice

30 sec

1 pt

Which of the following is the CORRECT list of water's properties?

Read Carefully!

adhesion, cohesion, high specific heat, universal solvent

adhesion, cohesion, low specific heat, universal solvent

adhesion, no cohesion, low specific heat, universal solute

no adhesion, cohesion, high specific heat, universal solute

30.

Multiple Choice

30 sec

1 pt

You body sweats to help prevent you from overheating. How does water regulate temperature?

it lets heat pass through it

it absorbs a lot of heat, then decreases in temperature

it absorbs a lot of heat, but only increases a little in temperature

heat is afraid of water and avoids it

31.

Multiple Choice

30 sec

1 pt

Water is polar. What does that mean?

it is a molecule with opposite charges on opposite ends

it is a molecule with no charge

it is a molecule with identical charges on opposite ends

it is a molecule with too many protons

32.

Multiple Choice

30 sec

1 pt

Water sticks well to many materials. What term relates to this property of water?

cohesion

adhesion

density

surface tension

33.

Multiple Choice

2 mins

1 pt

Why can water have no net charge but have slight charges in different parts of the molecule?

The oxygen end is slightly negative and the hydrogen end is slightly positive

The hydrogen end is slightly negative and the oxygen end is slightly positive

The hydrogen and oxygen ends change in polarity

Because it is hydrophobic

34.

Multiple Choice

2 mins

1 pt

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.

adhesion

capillary action

cohesion

surface tension

35.

Multiple Choice

2 mins

1 pt

Which of the following is LEAST likely to dissolve in water?

nonpolar fats and oils

polar sugar molecules

salt made of a positive sodium ion and a negative chloride ion

all of the substances will dissolve easily in water

36.

Multiple Choice

30 sec

1 pt

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

Water is pushed by solutes

Capillary action pulls the water molecules like a chain

Water is pulled by gravity

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

37.

Multiple Choice

2 mins

1 pt

Which property of water will cause water to bead up on glass?

Adhesion

Cohesion

Ability to dissolve substances

High specific heat

38.

Multiple Choice

30 sec

1 pt

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 is a good solvent.

Water exhibits strong cohesion.

. Water has an unusual crystalline structure.

Water has a high capacity for heat.

39.

Multiple Choice

30 sec

1 pt

The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form

less polar

more polar

less dense

more dense

40.

Multiple Choice

30 sec

1 pt

Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?

Flooding would occur and animals would be forced to migrate

Harmful organisms living in water would reproduce at a rapid rate

Organisms that are sensitive to changes in temperature would die

Plants would not have enough water to effectively carry out photosynthesis

41.

Multiple Choice

30 sec

1 pt

Water is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent?

purity

polarity and cohesion

high heat capacity

expansion upon freezing

42.

Multiple Choice

5 mins

1 pt

The tightness across the surface of water that enables paper clips to float called .....

adhesion

capillary action

surface tension

polarity

43.

Multiple Choice

30 sec

1 pt

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

Water expands as it freezes.

Water is an excellent solvent.

Water exhibits cohesive behavior.

Water is able to moderate temperature.

44.

Multiple Choice

30 sec

1 pt

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 absorbs heat when it evaporates and forms a gas

Water expands and becomes less dense when it freezes.

Water molecules completely separate into ions in solutions.

Water forms hydrogen bonds with ions and other polar substances.

45.

Multiple Choice

30 sec

1 pt

Which of the following characteristics of water is not a result of hydrogen bonding?

adhesive strength

capillarity

cohesive strength

All of the above are a result of hydrogen bonding.

46.

Multiple Choice

30 sec

1 pt

Water heats up slowly because it has

cohesion

polarity

high specific heat

low specific heat

47.

Multiple Choice

30 sec

1 pt

Water forms droplets because of

adhesion

cohesion

capillary action

universal solvent

48.

Multiple Choice

30 sec

1 pt

Water moves up to the top of plants because of

cohesion

adhesion

capillary action

specific heat

blood vessels

49.

Multiple Choice

30 sec

1 pt

Which best describes adhesion?

movement of water up a straw

attraction between similar molecules

attraction between different molecules

positive and negative charges

50.

Multiple Choice

30 sec

1 pt

Which property explains why water molecules have cohesion?

surface tension

capillary action

polarity

adhesion

51.

Multiple Choice

30 sec

1 pt

Water soaks through a paper towel due to

capillary action

surface tenstion

polarity

density

52.

Multiple Choice

30 sec

1 pt

Sugar, salt, and baking soda dissolve in water because water is the

best substance

universal solute

universal solvent

magic potion

53.

Multiple Choice

30 sec

1 pt

The useful properties of water arise from its structure.

True

False

54.

Multiple Choice

30 sec

1 pt

Why do water molecules attach to one another?

Because of the slightly positive regions and slightly negative regions

Due to the positive regions attracting other positive regions

Due to the negative regions attracting other negative regions

None of the above

55.

Multiple Choice

30 sec

1 pt

Refer to the picture of water sticking to a leaf; this is occurring because of:

Adhesion

Cohesion

56.

Multiple Choice

30 sec

1 pt

Refer to the picture; the water strider can walk over waters surface. This is occurring due to:

Adhesion

Cohesion

57.

Multiple Choice

30 sec

1 pt

Refer to the picture; this is occurring because of:

Adhesion

Cohesion

58.

Multiple Choice

30 sec

1 pt

Water is a liquid at room temperature, and this

is one of its many unique properties

is not important

prevents it from cycling from the abiotic to biotic forms in an ecosystem

59.

Multiple Choice

30 sec

1 pt

Refer to the photo. Which below best describes what is happening in the photo?

Water is acting as the universal solve thanks to COHESION

Water is adhesively hydrogen bonding to salt molecules

Water is being a liquid at room temperature

A meniscus is forming due to adhesion

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