Chemical changes
Physical changes
Name that Reaction
Atoms
Hodgepodge
100
give an example of a chemical change
rust, vinegar and baking soda etc
100
Give an example of a physical change
cutting, melting, splitting, etc
100
Single Replacement
100
does forming chemical bonds store or release energy?
forming bonds stores energy,
100
give an example of an exothermic reaction
explosion, burning wood, etc,
200
give an example of how cooking is just chemical changes
browning anything on the stove
200
make a physical change
folding clothes.
break a pencil
rip a paper
200
Combination/Synthesis
200
Two or more different atoms joined together
What is molecule
200
Draw the particles in the 3 phases of matter
solid, liquid, and gas
300
give 3 signs that a chemical change happened
released bubbles
changed color
precipitate
gave off heat light, etc
300
Which one is not a physical change?
cutting paper into strips
lighting paper on fire
putting paper in the freezer
lighting on fire = chemical
300
Decomposition
300
Define "chemistry"
the study of matter and how it changes
300
what is the name of a reaction that makes its surroundings colder when it happens?
Endothermic
400
explain why salt dissolving in water is NOT a chemical change
not making new chemicals, can just evap water and separate them
400
Define a physical property
can be observed about a substance without creating a new substance
400
Double Replacement
400
how many atoms are in the chemical formula: (also what is it?)
C6H12O6
24 atoms total, its glucose
400
what is the law of conservation of mass
matter cannot be chemically created or destroyed. no matter what chemical reaction happens the matter always needs to end up somewhere.
500
write a chemical formula showing the process of rusting
iron + oxygen -> rust (iron oxide)
500
explain how sublimation is a physical change
Not making any new chemicals. If you get the CO2 gas super cold again it will form back into a solid block
500
Write out the variable versions of all 4 types of chemical reactions. (use A, B, C, D)
A + B -> AB
AB -> A + B
AB + C -> AC + B
AB + CD -> AC + BD
500
what 3 particles make up an atom?
protons neutrons and electrons
500
Balance this reaction:
