Chemical Change
Give 4 examples of chemical change.
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
The ability of matter to combine chemically with other substances.
REACTIVITY
Give 3 examples of COLOR.
blue, red, green, yellow, purple, orange, etc.
Is Oobleck SOLID or LIQUID?
BOTH!
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.
The ability of a chemical to burn or ignite or cause fire.
FLAMMABILITY
Is shredding paper a physical change?
Yes!
Give 1 example of physical change and chemical change.
...
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 capacity of substances to be mineralized by free‐living bacteria.
BIODEGRADABILITY
The exact temperature at which a liquid becomes a gas.
Boiling Point
Why is Oobleck both SOLID and LIQUID?
You can slowly dip your hand into it like a liquid, but if you squeeze or punch it, it will feel solid.
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 OXIDATION.
Rusting and tarnishing
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.
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 3 examples of chemical properties.
Oxidation, reactivity, flammability, biodegradability
Give 5 examples of physical properties.
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