A physical change is a change in a substance that does NOT change its identity.
100
Define chemical change.
A chemical change is a when 2 or more substances combine to form a new substance with new & different properties.
100
Draw a picture of how the atoms in a SOLID, LIQUID, & GAS behave.
Teacher will check
100
Solid to a Liquid
Melting
100
Gas DIRECTLY back to a Solid
Deposition
200
List the three physical changes.
Change of State, Change of Shape, Dissolving
200
List at least 2 signs that a chemical change is occurring with a piece of burning wood.
- Smoke/Heat
- Light/Sound
- Odor
- unexpected change of color
200
Definite shape / definite volume.
Solid
200
What state will water become if we take heat energy away from it.
SOLID
200
Rotten milk is a physical or chemical change?
If chemical, which sign of a chemical change do we see?
If physical, which physical change is it?
Chemical change
-Formation of a precipitate!
300
Evaporation is a physical or chemical change?
Physical - change of STATE
300
Identify the solute and solvent when we dissolve ice tea mix in water.
Sugar: solute
Water: solvent
300
Definite volume, not a definite shape.
Liquid
300
Condensation is the state from a ________ to a ________.
Gas to a Liquid.
300
Cutting, tearing, or ripping a piece of paper is which type of physical change?
Change of SHAPE
400
The statue of liberty turning green over time. Physical or Chemical Change?
Chemical : Copper + Oxygen = copper oxide
400
An alka seltzer tablet in water is what type of change?
-If chemical, list a sign.
- If physical, identify the change.
Chemical Change
- bubbling/fizzing
400
Part A. What is the HOTTEST, ionized gas called?
Part B What is the COLDEST state of matter, which almost reaches absolute zero?
Ionized gas: Plasma
Coldest state: BE-Condensate
400
Compare and contrast evaporation and boiling point.
both are the state change from a liquid to a gas.
Difference: Boiling point requires us to heat the liquid to its boiling point. Evaporation happens on the surface of the water on its own!
400
Mixing pink lemonade and water is which type of physical change?
Dissolving
500
What type of change is happening when we see a burning candle?
BOTH PHYSICAL AND CHEMICAL CHANGES
- Physical: Change of State (wax melting)
- Chemical: Burning wick - smoke/odor/heat/light.
500
List all six signs of a chemical change.
- smoke/heat
- light/sound
- formation of a precipitate
- unexpected change in color
- change in odor
- fizzing and bubbling
500
List the 5 states of matter in order of LEAST energetic to MOST energetic.
BE-Condensate, solid, liquid, gas, plasma
500
Solid DIRECTLY to a Gas
Sublimation
500
Part A: List 1 exothermic state change. **Heat EXITS**
Part B: List 1 endothermic state change. **Heat ENTERS**
Part A: Exothermic: Freezing
Part B: Endothermic: Melting