Science
Two main properties of matter are?
Matter takes up space and has mass (you can weigh it)
True or False: All substances are made of matter
True, all substances are made of matter
What is a solid?
A solid keeps its shape and volume.
What is a liquid?
A liquid takes the shape of its container and can flow.
What is a gas?
A gas expands until it reaches a barrier.
The particles of a substance (blank) energy when they change from a liquid to a gas
Gain
The particles of a substance (blank) energy when they change from a liquid to a solid.
Lose
Melting
Solid to liquid, particles gain energy and move faster.
Condensation
Gas to liquid, particles lose energy and move slower.
Freezing
Liquid to solid, particles lose energy and move slower
Evaporation
liquid to gas, particles gain enrgy and move faster
melting point
The temperature where a solid gains enough energy to become a liquid
Freezing Point
The temerature where a liquid loses enough energy that it becomes a solid
Boiling Point
The temperature where a liquid gains enough energy to become a gas
Condensation Point
The temperature where a gas loses enough energy that it becomes a liquid
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
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
Is butter melting a physical or chemical change?
Physical
Is grilling a steak a physical or chemical change?
Chemical
Is chopping wood a physical or chemical change?
Physical
Is a campfire a physical or chemical change?
chemical
Is baking a cake a physical or chemical change?
Chemical
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
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
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