If we drop a ball of lead and another one of wool of the same dimensions and at same time from and 100 metre high building, the ball which hits the ground first is:
a) The lead ball
b) The wool ball
c) Both at the same time
c) Both at the same time
What would happen if the earth's atmosphere vanished? The weight of things
a) would decrease
b) would be zero
c) would increase
d) wouldn’t change
d) Wouldn’t change
The study of respiration shows:
a) Green plants and animals always consume oxygen and release CO2 day and night.
b) Green plants only breath at night.
c) Green plants breathe during the day taking carbon dioxide and releasing CO2
a) Green plants and animals always consume oxygen and release CO2 day and night.
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