Chaper 1 Lesson 2

Question 1

Salinity

Answer 1

The measure of dissolved salts

Question 2

How is salinity measured?

Answer 2

It is measured in grams

Question 3

Where does the salt in the ocean come from?

Answer 3

Inside earth, from land, and atmosphere

Question 4

How does the salt enter from each of these places?

Answer 4

Inside the earth: volcanoes and hydrothermal vents

From land: freshwater in streams and rivers

Atmosphere: wind and deposited into the ocean

Question 5

What happens to the salt in the ocean?

Answer 5

• dissolves

* becomes sediment and rocks

Question 6

Tap water

Answer 6

Freshwater from faucet, which has been treated to kill bacteria and harmful substances

Question 7

Dry ice

Answer 7

Solid carbon dioxide commonly used to keep foods cold during shipping

Question 8

Salt water

Answer 8

Water that contains dissolved salts

Question 9

Ice

Answer 9

Water in the solid state

Question 10

Distilled water

Answer 10

pure water with all substances removed

Question 11

Sublimation

Answer 11

The process of changing from solid to a gas

Question 12

Freezing point

Answer 12

The temperature at which a liquid begins to change into a solid

Question 13

Melting point

Answer 13

The temperature at which a solid begins to change into a liquid

Question 14

How is density different as you increase the temperature of water?

Answer 14

It is either in the melting or freezing point

Question 15

What property of water holds water molecules together?

Answer 15

Hydrogen bonds

Question 16

Polar covalent bond

Answer 16

A bond in which 2 or more different atoms combine, the electrons are NOT shared equally and shared electron charge or in negative pairs

Question 17

Difference between polar bond and hydron bond.

Answer 17

Polar bonds are combined by negative ends and hydrogen combines with opposite charges of their hydrogen and oxygen “ends”.

Question 18

How is salt added to the ocean?

Answer 18

By the atmosphere, under the earth, and by land.

Question 19

How is salt removed from the ocean?

Answer 19

It can either be dissolved or turns into sediment on the sea floor.

Question 20

What is osmoregulation?

Answer 20

the maintenance of constant osmotic pressure in the fluids of an organism by the control of water and salt concentrations.

Question 21

Why is alt added when you make ice cream?

Answer 21

Adding salt lowers the freezing temperature of water, it means that the water won’t freeze as easily

Question 22

The measure of dissolved salts in water is known as_______

Answer 22

Solution

Question 23

In a solution the part that does the dissolving is known as the__________

Answer 23

Saturation

Question 24

In salt water which is the solute?

Answer 24

Salt

Question 25

List two renewable sources in the ecosystem.

Answer 25

Sunlight

Wind

Question 26

What is the density of freshwater?

Answer 26

1g/cm3

Question 27

Water molecules are held together by_______

Bonds and salt atoms are held together by _________ bonds.

Answer 27

• Covalent bonds

- iconic bond