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8 questions
does tree have roots?
yes
no
maybe
i don't know
what is o2?
scientific name of oxygen
scientific name of carbon dioxide
plants part
root
stem
leaf
rubber
do you like plants?
yes
no
do plants produce oxygen?
yes
no
maybe
i don't know
what is co2?
scientific name of oxygen
scientific name of carbon dioxide
if all plants were cut down, what would happen?
earth temperature getting colder
earth air getting fresh
earth temperature getting hotter
where does co2 come from?
human
animal
car
tree
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