Earth Chemistry: Dry Ice and Salt Video Flashcards

1
Q

Dry ice doesn’t melt, it ___________.

A

Sublimates

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2
Q

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

A
Carbon 
Dioxide 
1
Carbon
2
Oxygen
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3
Q

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

A

Phase

Change

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4
Q

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

A

Sublimation

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5
Q

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.

A

More

Dense

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6
Q

There are over _____ known uses for salt.

A

14000

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7
Q

Salt ______ the freezing temperature of water.

A

Lowers

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8
Q

Salt ________ water.

A

Attracts

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9
Q

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

A

High
Blood
Pressure

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10
Q

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

A

Kansas

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11
Q

The Chinese used salt to _______ people.

A

Torture

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12
Q

The Germans used the salt mines to _________________________________________.

A

Hide stolen items that the Nazis stole in WWII

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13
Q

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

A

Salt lowers and stabilizes and humidity levels.

Salt will not burn.

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14
Q

Another name for salt is ______ ________.

A

Sodium

Chloride

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15
Q

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

A

1 tsp

2400 mg

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16
Q

What percent of our body is made of salt?

A

.15%

17
Q

We have to eat salt because:

A

Our body doesn’t produce it.

18
Q

Why do we need salt to live?

A

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