Show:
Vocabulary
Liquids
Solids
Gas
Experimentation
100

The smallest unit that defines a chemical element.

atom

100

These stay together and don't break apart easily.

water molecules

100

When you hear a sample of a solid, the particles that make up the solid...

move faster

100

Steam is a form of this.

gas

100

In science, we always start with one of these.

a question.

200

The study of matter and what matter does.

chemistry

200

Food coloring spreads out faster in...

hot water

200

The particles of these, are attracted to each other, vibrate in motion but do not move past one another, and have mass.

solids

200
This happens because the attractions in a gas are too weak to bring the molecules together.
Why do molecules of gas move about so freely?
200

What happens when you inhale helium?

Your voice rises in pitch.

300

This takes three basic forms: solid, liquid, and gas.

matter

300

Water molecules are always ____________ to one another?

attracted

300

If I took a solid brass ball and heated it up, the size of the ball would...

increase

300

True or False? Gas molecules will spread out evenly to fill any container?

true

300
When a water bottle dipped in soapy water is placed in a cup of hot water, the soap will become __________.
What is convex?
400

Anything that has mass and takes up space.

matter

400

When a thermometer is heated, the red liquid inside the thermometer moves up because it...

expands

400

Give three examples of a solid.

____________, ____________, and ____________

400

Gas molecules will __________ and move freely past one another.

vibrate

400
The balloon will weigh more.
When it is filled with air.
500

A group of two or more atoms that stick together.

molecule

500
Explain the difference between cold and hot temperature water, on a molecular level.
Cold water molecules move at a slower rate reducing the strain on their attractions, making them closer together. Hot water moves at a faster rate depending on the temperature of the water, causing strain on their attractions, expanding the size of each molecule.
500

True or False? All solids will loose their shape when heated?

true

500
Does gas have mass? How do you know? Explain in molecular terms citing an experiment done in class.
Student should cite the ball, can of compressed air, or soapy water bottle.
500

Explain what happens when ice turns to water and to steam?

When water is cooled to a freezing point, the molecules slow down in such a way that they are highly attracted to one another and can no longer move past one another. As the molecules are heated, the attractions are slowly weakened to where they expand and become fluid in motion. Finally, once water becomes heated to such a point, the molecules are moving so fast that the attractions are too weak to bind together and move freely around and past one another.