Earth Chemistry: Dry Ice and Salt Video

Question 1

Dry ice doesn’t melt, it ___________.

Answer 1

Sublimates

Question 2

Another name for dry ice is ______ _______, which is made of _ atom of ______ and _ atoms of ______.

Answer 2

Carbon 
Dioxide 
1
Carbon
2
Oxygen

Question 3

When a substance goes from a solid to a liquid to a gas, it is called a _____ ______.

Answer 3

Phase

Change

Question 4

When a substance goes directly from a solid to a gas, it is called ___________.

Answer 4

Sublimation

Question 5

Based upon the experiment with dry ice in a fish tank and blowing bubbles over the tank, we know that dry ice in a gas form is ____ _____ than the air we breathe.

Answer 5

More

Dense

Question 6

There are over _____ known uses for salt.

Answer 6

14000

Question 7

Salt ______ the freezing temperature of water.

Answer 7

Lowers

Question 8

Salt ________ water.

Answer 8

Attracts

Question 9

Too much salt in our diet can lead to ____ _____ ________.

Answer 9

High
Blood
Pressure

Question 10

The state of ______ can provide us with enough salt for the next 250,000.

Answer 10

Kansas

Question 11

The Chinese used salt to _______ people.

Answer 11

Torture

Question 12

The Germans used the salt mines to _________________________________________.

Answer 12

Hide stolen items that the Nazis stole in WWII

Question 13

In the U.S., what are TWO advantages of using salt mines for storing valuables?

Answer 13

Salt lowers and stabilizes and humidity levels.

Salt will not burn.

Question 14

Another name for salt is ______ ________.

Answer 14

Sodium

Chloride

Question 15

A 110lb person should consume ____/______ a day.

Answer 15

1 tsp

2400 mg

Question 16

What percent of our body is made of salt?

Answer 16

.15%

Question 17

We have to eat salt because:

Answer 17

Our body doesn’t produce it.

Question 18

Why do we need salt to live?

Answer 18

We need salt to live because it controls the way our muscles, cells, and nervous system work. Salt is an electrolyte, helping a lot of things in our body work, like helping the nerve endings in our body to connect