Properties of Water

Question 1

What term best explains water droplets being formed by water molecules being attracted to each other?

Answer 1

Cohesion

Question 2

What property allows water to stick to the sides of a straw?

Answer 2

Adhesion

Question 3

What property of water allows bugs to walk on water?

Answer 3

Surface tension

Question 4

Water takes ________________ heat to change to its gaseous state

Answer 4

Large amounts of

Question 5

What property of water allows sweat to cool the body & coastal cities to have more moderate temperatures than inland cities?

Answer 5

High heat capacity

Question 6

A solution with a pH of 3 is:

Answer 6

Acidic

Question 7

A solution with a pH of 8 is:

Answer 7

Basic

Question 8

Why is water a polar molecule?

Answer 8

One side of the molecule has a slight positive charge, and the other side has a slight negative charge

Question 9

Which side of the water molecule has a slight negative charge?

Answer 9

The oxygen side

Question 10

What type of bond exists between the hydrogen and oxygen atoms?

Answer 10

Covalent bonds

Question 11

What type of bond is formed between water molecules?

Answer 11

Hydrogen bonds

Question 12

Why does surface tension and capillary action occur in water?

Answer 12

Because it has hydrogen bonds

Question 13

What kinds of substance can dissolve in water?

Answer 13

Polar molecules

Question 14

What needs to be true for a neutral solution?

Answer 14

H+ needs to be equal to OH-

Question 15

What needs to be true for a basic solution?

Answer 15

OH- needs to be greater than H+

Question 16

What percent of the Earth’s surface is covered in water?

Answer 16

72%

Question 17

What percent of water is salt water?

Answer 17

97%

Question 18

Where is most fresh water found?

Answer 18

Glaciers and ice caps

Question 19

Evaporation

Answer 19

Liquid water on Earth’s surface changes into water vapor in the atmosphere

Question 20

Sublimation

Answer 20

Snow or ice on Earth’s surface changes directly into water vapor in the atmosphere

Question 21

Transpiration

Answer 21

Plants give off liquid water, most of which evaporates into the atmosphere

Question 22

Condensation

Answer 22

Water vapor in the atmosphere changes to liquid water droplets, forming clouds or fog

Question 23

Precipitation

Answer 23

Water droplets in clouds are pulled to Earth’s surface by gravity, forming rain, snow, or other types of falling moisture

Question 24

What are the freezing and boiling points of water?

Answer 24

0 degrees Celsius/32 degrees Fahrenheit and 100 degrees Celsius/212 degrees Fahrenheit

Question 25

What is the chemical equation for an anabolic reaction?

Answer 25

6CO2 + 6H2O + energy = C6H12O6 + 6O2

Question 26

What is the chemical equation for a catabolic reaction?

Answer 26

C6H12O6 + 6O2 = 6CO2 + 6H2O + energy

Question 27

What is the pH of water?

Answer 27

7

Question 28

If a substance is more acidic, does it have a pH higher or lower than 7?

Answer 28

Lower