States of Matter

States of Matter

100

List the 4 states of matter.

- Solid

- Liquid

- Gas

- Plasma

200

Describe the properties of a Solid.

- definite shape and volume

- molecules are packed closely together and are structured

- molecules vibrate in place

300

Describe the properties of a liquid.

- have a definite volume, not a definite shape

- molecules move fast enough to flow

- no set structure

400

Describe the properties of a gas.

- extremely fast-moving molecules

- no definite shape or volume

- conforms to the shape or volume in container

500

Explain where we can find plasma in nature and its molecules.

- lightning

- plasma signs

- sun

- charged molecules

State Changes

100

Define deposition.

Deposition- the change from a gas to a solid without passing through the liquid state

200

Frost is an example of...

deposition

300

_____________ is an atom that has gained or lost one or more electrons

Ion

400

Define sublimation

the change from a solid to a gas without passing through the liquid state

500

Dry ice is an example of

sublimation

Temperature

100

_________________ was the first scientist that created the thermometer, known as a thermoscope.

Galileo

200

Daniel Fahrenheit invented both the __________ themometer and the _____________ thermometer.

Alchohol and mercury

300

_____________ invented the centigrade scale, with 100 degrees between waters freezing and boiling points.

Anders Celcius

400

Lord Kelvin developed the Kelvin scale which is based on the lowest possible level of heat or, _____________.

Absolute Zero.

500

In the lab we did in class, we know that a water's ___________________ is greater than that of air.

heat capacity

Uniqueness of H2O

100

Polar molecules permit ______________ bonds to form. These are weak bonds.

Hydrogen bonds

200

Polar hydrogen bonds attract to one another... in some instances, an elastic property of liquids forms which creates the smallest area at the surface of a liquid. This is known as...

surface tension

300

The ability of one substance to dissolve in another is known as...

Solubility

400

True or False. Waters melting point is the same as its freezing point.

True!

500

If you were to drop a penny into a glass of molasses the penny would not fall to the bottom of the glass. This is testing the _____________ of molasses. 

Viscosity

pH scale

100

What does the pH scale measure?

a scale that indicates the concentration of hydrogen ions in a solution (0-14)

200

What is an acid?

a substance with a pH less than 7

300

What is a base?

A substance with a pH greater than 7.0

400

Water is known as what kind of substance? (hint: it falls on 7 on the pH scale)

neutral

500

Give examples of where we check for pH in nature and our world.

- pool

- skincare

- food

- restaurants