Science
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100

Two main properties of matter are?

Matter takes up space and has mass (you can weigh it)

100

True or False: All substances are made of matter

True, all substances are made of matter

100

What is a solid?

A solid keeps its shape and volume.

100

What is a liquid?

A liquid takes the shape of its container and can flow.

100

What is a gas?

A gas expands until it reaches a barrier.

200

The particles of a substance (blank) energy when they change from a liquid to a gas

Gain

200

The particles of a substance (blank) energy when they change from a liquid to a solid.

Lose

200

Melting

Solid to liquid, particles gain energy and move faster.

200

Condensation

Gas to liquid, particles lose energy and move slower. 

200

Freezing

Liquid to solid, particles lose energy and move slower

300

Evaporation

liquid to gas, particles gain enrgy and move faster

300

melting point

The temperature where a solid gains enough energy to become a liquid

300

Freezing Point  

The temerature where a liquid loses enough energy that it becomes a solid

300

Boiling Point

The temperature where a liquid gains enough energy to become a gas 

300

Condensation Point

The temperature where a gas loses enough energy that it becomes a liquid

400

What is the definition of a physical change?

A physical change is when a chemical changes its state (solid, liquid, or gas) or is brocken into smaller pieces

400

What is the definition of a chemicla change?

 a chemicla change is when two or more chemicals are mixed together, and they react with a so that completely new chemicals are formed  

400

Is butter melting a physical or chemical change?

Physical

400

Is grilling a steak a physical or chemical change?

Chemical

400

Is chopping wood a physical or chemical change?

Physical

500

Is a campfire a physical or chemical change?

chemical

500

Is baking a cake a physical or chemical change?

Chemical

500

What are the six sighns of a chemical reaction?

1. Change in temperature

2. Change in color

3. A gas is formed 

4. A solid is formed from two liquids

5. An odor forms

6. A pH change 

500

What has to happen to the particles of the mixed chemiclas before a chemical reaction can occur?

The particles of the chemicals must bump into each other before a reaction can occur

500

Do you have to see all signs of chemical reaction to know a reaction occurred?

No, you do not have to see all the signs

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