What happens when forests are burned?a) Stored carbon is released back into the air b) More oxygen is created c) Carbon disappears forever d) The air becomes cleaner
a) Stored carbon is released back into the air
Which method is best for separating sand from water? a) Hand picking b) Sieving c) Filtration d) Winnowing
c) Filtration
Why was plastic a good solution when it was first invented? a) It was expensive and rare b) It replaced animal products, saving animals c) It could only be used once d) It dissolved in water
b) It replaced animal products, saving animals
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