Name that word!
Sing it!
Explain it
Solve the equation
Chemical warnings
100
a special sentence that describes what happens in a chemical reaction
What is a chemical equation?
100
a substance that is changed in a chemical reaction is called this
What is a reactant?
100
How is rust formed?
this forms when iron is exposed to air and moisture; the oxygen in the air or the water react with the iron atoms
100
x + 25 = 78
What is 53?
100
harmful or irritating
What is X?
200
a substance that forms during a chemical reaction
What is a product?
200
this happens when one substance changes into another substance
What is a chemical change?
200
How did chemists improve natural rubber?
they added sulfur to make it more durable and usable year-round
200
425 + n = 600
What is 175?
200
skull and crossbones
What is poisonous?
300
the process of burning
What is combustion?
300
food being digested in the small intestine is called this
What is a chemical change?
300
How are physical changes and chemical changes different?
In a physical change, the material keeps its identity and properties. In a chemical change, the substance changes into another completely different substance with different properties.
300
187 - x = 97
What is 90?
300
flames
What is flammable?
400
when objects change by tearing, crushing or melting, but do NOT change into different substances
What is a physical change?
400
the kind of reaction that occurs when water breaks down, producing hydrogen and oxygen gases
What is a decomposition reaction?
400
With a cold sports pack, you twist the pack, causing 2 substances to mix. The sports pack quickly becomes cool. Has a chemical change occurred? Explain.
Yes, when the substances come into contact, there is a temperature change. This is evidence of a chemical change.
400
If 360 g of water is decomposed to give 40 g of hydrogen gas, how much oxygen gas will be made?
What is 320 g?
400
green and black rocks
What is explosive?
500
a large molecule formed from smaller identical units
What is polymer?
500
this is the first step when you are going to use a cleaning product that you have never used before
What is read the directions?
500
this man discovered penicillin and explain how he discovered it
Who is Alexander Fleming? He discovered it accidentally; his lab was a MESS!
500
125 - x = -25
What is 150?
500
Explain how the symbol for radioactive looks.
Yellow and black circle and 4 sided figures
M
e
n
u