Chemical Change
Give 4 examples of chemical change.
Daily DOUBLE: Example answers: iron rusting, necklaces tarnishing, baking cookies, baking pancakes, wood rots, etc.
Whipping eggs, boiling water, dissolving sugar, and dicing vegetables are examples of what?
Physical Change
Give 3 examples of COLOR.
blue, red, green, yellow, purple, orange, etc.
Is Oobleck SOLID or LIQUID?
BOTH!
It's a hot day in Mississippi. You accidently left chocolate outside in the car. You noticed that it melted. Is this a chemical change or physical change?
Physical Change
How many substances join to form new chemical properties?
Two or more.
Give 3 evidence of physical change.
Change in form, shape, size, and phase.
Is shredding paper a physical change?
Yes!
Give 1 example of physical change and chemical change.
...
matter stays the same even when a substance changes form
Law of Conservation of Matter
When a chemical reaction between substances gets heat, it is all because of what element?
Oxygen
Give the physical change of a candle.
When the candle burns down, it will go back into the same form, it's still a candle.
The exact temperature at which a liquid becomes a gas.
Boiling Point
Why is Oobleck both SOLID and LIQUID? - FINAL JEOPARDY
You can slowly dip your hand into it like a liquid, but if you squeeze or punch it, it will feel solid.
You are wanting some chocolate milk. You get out the chocolate syrup and the milk. When you mix them together and taste it, it has a sour taste. Is this chemical change or physical change?
Chemical Change
Is mixing water and sugar a chemical change?
NO! If you evaporate water, the sugar would still be left.
What are the 3 main states of matter?
Solid, liquid, gas
Give an example of a change in size physical change.
Example answer: Cutting a paper
What is the difference between a physical change and a chemical change?
Physical change is REVERSIBLE while chemical change is IRREVERSIBLE.
This property is what is observed when something catches fire.
chemical property
A chemical change is when bonds between atoms are broken and created to form what?
To form NEW molecules/substances!
Give 4 examples of a physical change.
Melting, boiling, evaporation, condensation, freezing, sublimation, deposition.
Give 5 examples of physical properties.
Daily Double - COLOR, TEXTURE, TEMPERATURE, MASS, VOLUME, DENSITY, HARDNESS, SHAPE, BOILING POINT, MELTING POINT
Physical or Chemical Change: Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen is full of smoke.
CHEMICAL CHANGE
What property is observed when the water on the stove starts to bubble?
Physical property