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15
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Complete the sentence: "FERMENTATION is a chemical reaction which involves m____________ which transform s___________ into organic substances".
1. microorgamisms/ 2. sugars
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15
×
Which chemical reaction is also known as BURNING? a. OXIDATION b. FERMENTATION c. COMBUSTION
c. COMBUSTION
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20
×
"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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15
×
Complete this sentence: "Both, m_______ and f________ can oxidise producing different results. The product is r_______ ".
1. metals/ 2. food/ 3. rust
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20
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"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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15
×
Which chemical reaction is used in order to PRESERVE FOOD? a. OXIDATION b. FERMENTATION c. COMBUSTION
b. FERMENTATION
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baam
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magnet
Take 10 points!
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gift
Win 15 points!
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lifesaver
Give 20 points!
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15
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When we use fermentation to make bread or wine, do we use FUNGI or BACTERIA?
FUNGI.
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15
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The original substances of a chemical reaction are called products. TRUE OR FALSE?
FALSE. They are called reactants.
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15
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When we use fermentation to make yoghurt and cheese, do we use FUNGI or BACTERIA?
BACTERIA.
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15
×
Which chemical reaction produces LIGHT AND HEAT? a. OXIDATION b. FERMENTATION c. COMBUSTION
c. COMBUSTION
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20
×
"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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heart
Other team wins 25 points!
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seesaw
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shark
Other team loses 25 points!
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banana
Go to last place!
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20
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"Ice cream melts in the sunshine". HAS A CHEMICAL REACTION TAKEN PLACE?
NO, IT HASN'T. This is a change of state (from solid to liquid).
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15
×
New products are always formed from a chemical reaction. TRUE OR FALSE?
TRUE.
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trap
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gift
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shark
Other team loses 20 points!
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thief
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