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20
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"This metal has gone rusty". Rusty is the adjective we use to say that something has got rust. Can you define "RUST"?
"RUST" is a reddish-brown substance that appears when oxidation takes place (it easily breaks apart and makes the original object useless).
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20
×
"When two liquids are mixed, a blue solid forms at the bottom". HAS A CHEMICAL REACTION TAKEN PLACE?
YES, IT HAS. PRECIPITATE FORMATION is a very common sign of a chemical reaction.
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20
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"Condensation forms on a glass on a hot day". HAS A CHEMICAL REACTION TAKEN PLACE?
NO, IT HASN'T. This is a change of state (from gas to liquid).
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20
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Think about FERMENTATION and complete the sentence: "FUNGI produce a_______ and carbon dioxide. BACTERIA produce l_____ a_____ and carbon dioxide".
1. alcohol/ 2. lactic acid
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15
×
Which chemical reaction is used in order to PRESERVE FOOD? a. OXIDATION b. FERMENTATION c. COMBUSTION
b. FERMENTATION
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20
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"A glow stick emits light when it is broken". HAS A CHEMICAL REACTION TAKEN PLACE?
YES, IT HAS. There has been an ENERGY CHANGE (light energy).
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20
×
"Bubbles form when vinegar and baking soda are mixed together". HAS A CHEMICAL REACTION TAKEN PLACE?
YES, IT HAS. Some chemical reactions produce gas (GAS FORMATION).
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thief
Give points!
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25
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rocket
Go to first place!
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rocket
Go to first place!
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thief
Give points!
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25
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lifesaver
Give 20 points!
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seesaw
Swap points!
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fairy
Take points!
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25
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lifesaver
Give 20 points!
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15
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Which chemical reaction produces LIGHT AND HEAT? a. OXIDATION b. FERMENTATION c. COMBUSTION
c. COMBUSTION
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15
×
Which chemical reaction can SALT SPEED UP? a. OXIDATION b. FERMENTATION c. COMBUSTION
a. OXIDATION
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15
×
Oxygen is the new product formed by fermentation. TRUE OR FALSE?
FALSE. Carbon Dioxide is the new product formed by fermentation.
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15
×
We can use simple separation methods, like distillation, to separate the products of a chemical reaction. TRUE OR FALSE?
FALSE. The new product formed from a chemical reaction can only be separated again by another chemical reaction. Simple separation methods won't work.
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15
×
Can you tell me an example of fuel?
Wood/gas/oil
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baam
Lose 15 points!
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magnet
Take 25 points!
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fairy
Take points!
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banana
Go to last place!
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20
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"A glass jar feels warm after two cold substances are mixed together". HAS A CHEMICAL REACTION TAKEN PLACE?
YES, IT HAS. There has been an ENERGY CHANGE (thermal energy).
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