Science General

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38 terms · General science information from the notes.

Hydrolic Cycle

What happens to all of the water on the earth that isn't used?

10%

How much of rain/snow is used per year?

Vibrating

In the solid state, what motion does a water molecule have?

Tightly packed, but moving freely

In the liquid state, what motion does a water molecule have?

Spread out, and moving freely

In the gaseous state, what motion does a water molecule have?

Water < 100 degrees Celsius and > 0 degrees Celsius

What "region of temperature" can a water molecule be liquid?

Ice < 0 degrees Celsius

What "region of temperature" can ice (solid water) be solid?

Gas > 100 degrees Celsius

What "region of temperature" can gas (gaseous state) be gaseous?

As snow

When is water at its purest form?

Evaporation

When do water molecules break away from one another to make a gas.

Right as ice melts

When is LIQUID water at its purest form?

Removes the oil

What does the oil-water separation do?

Removes the solids

What does the sand-gravel filtration do?

Made it clearer and decreased the odor

What does the charcoal (AKA Carbon) filtration do?

True

True or False: Water is one of the rarest substances on earth.

1.00 g/cm^3

What is the density of water?

0 degrees celsius

What is the freezing point of water?

True

True or False: Water that we drink contains ions.

Colloid

What kind of matter exhibits the Tyndall Effect?

Solute and Solvent

What are the 2 parts to a solution?

False

True or False: Density is a chemical property.

...

KNOW HOW TO DRAW WATER, AMMONIA, CARBON, AND METHANE!!!

...

KNOW THE FIRST 18 ELEMENTS AND THE 7 DIATOMIC ELEMENTS!!!

Elements

Symbols are used to represent _______.

Compounds

Formulas represent ________.

Chemical symbols; chemical formulas; elements; compounds

Chemical equations are collections of special symbols (+) and (arrow), and ___________ and ___________ that represent ___________ and ___________. (I KNOW THIS LOOKS LIKE A STUPID QUESTION, BUT IT'S ONE SHE WOULD ASK).

Elements and Compounds

All chemical equations have symbols/formulas of ________ and _______.

Plus

In a chemical equation, elements and compounds are separated by a _______.

Reactants

Substances on the left of the arrow in a chemical equation are called ________.

Products

Substances of the right of the arrow in a chemical equation are called ________.

Cation

In a chemical equation, do you write the cation or anion first?

Jobs of a waste treatment plant

[1] To remove as much as possible - and reasonable - of foreign materials.
[2] To test the purity of water.

I can't draw it on this, but look it up if you don't know!!!

What is the sign for a partial charge?

Ions

Ionic compounds are composed of _______.

Cations; anions

In crystals, _______ surround _______, and vice versa.

Cations; anions

The attraction between _______ and _______ holds ions together (IONIC BOND!!!).

[1] Other polar molecules.
[2] Charged particles (ions).

If a molecule is polar, it will attract: ________ and ________.

[1] Solute - Solute.
[2] Solvent - Solvent.
[3] Solute - Solvent.

What are the 3 types of attractions beetween particles in a solution?

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