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
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gift
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rocket
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thief
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15
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 of the following can you separate with a magnet? Metal and Metal / Metal and plastic / Metal and sand /
Both metal and plastic and metal and sand
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15
Water is made up of...
2 hydrogens and 1 oxygen
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baam
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shark
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gift
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thief
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TRUE OR FALSE - Sugar dissolving in water is NOT a chemical reaction.
True - nothing changes and nothing different is produced.
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fairy
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banana
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15
The symbol for gold on the periodic table is...
Au
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15
What material DOESN'T make food oxidize? (From class experiment) (A) Sugar / (B) orange juice / (C) flour / (D) oil
C. Flour
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15
Mixtures are __________ combinations of ___________.
Physical combinations of more than one substance
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15
WHAT CAUSES chemical reactions?... (A) Light and water /(B) heat and oxygen / (C) light and heat / (D) Fire and earth
B. Heat and oxygen
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15
All matter is made up of ...
Atoms and molecules
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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.
