The types of chemical reactions are: (A) solid, liquid and gas / (B) Evaporation, digestion and magnetic separation / (C) Elements, compounds and mixtures / (D) Oxidation, combustion and fermentation
D. Oxidation, combustion and fermentation
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15
Which is NOT an example of a chemical reaction? ( A) Yeast fermenting bread dough / (B) Wood burning / (C) Separating iron from sand with magnets / (D) all of these answers are correct.
C - separating iron from sand with magnets.
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15
In a chemical reaction, energy is either ________ or _________ (A) absorbed or released / (B) digested or breathed / (C) eaten or drunk / (D) None of the above answers is correct
A. Energy is either absorbed or released.
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15
Substances can either be _________ or ________
Elements or compounds
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baam
Lose 20 points!
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shark
Other team loses 15 points!
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fairy
Take points!
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thief
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15
Combustion is... (A) Exothermic - produces heat / (B) Endothermic - absorbs heat / (C) Exothermic - surroundings get hotter / (D) Both A and C are correct.
D. Both A and C are correct.
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15
Fermentation is caused by: (A) Fungi ONLY / (B) Fungi and bacteria / (C) Bacteria ONLY / (D) None of these answers is correct.
B. Fermentation is caused by FUNGI AND BACTERIA.
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monster
Reset all scores!
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shark
Other team loses 25 points!
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gift
Win 5 points!
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banana
Go to last place!
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15
When a chemical reaction occurs, it... (A) Produces the same things / (B) changes the properties of a substance / (C) Produces something different / (D) destroys things / (E) both B and C
Both B and C are correct
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15
TRUE OR FALSE : Soda with ice is an example of a homogeneous mixture
False - the ice can be separated so it's HETEROgeneous!
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banana
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rocket
Go to first place!
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fairy
Take points!
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baam
Lose 5 points!
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15
All matter is made up of ...
Atoms and molecules
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15
How many types of chemical reactions are there? (A) 5 - five / (B) 10 - ten / (C) 3 - Three / (D) 4 - four
C - 3 (three)
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15
True or false: There are 3 types of mixtures.
False, there are 2 types (homogeneous and heterogeneous)
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seesaw
Swap points!
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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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15
What things produce combustion? (A) Fish, plants and petrol / (B) Natural gas, wood and plastic / (C) Electricity, Iron and paper / (D) Natural gas, wood petrol
