1.
Fill in the blanks.
a.__________invented pendulum clock.
b.____________is the unit for measuring the frequency of sound.
c.Tomatoes are the richest source of____________
d._______is the crust of the earth.
e.___________is the science of governing travel in space.
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Answer:
Explanation:
(a) Christiaan Huygens
(b) Hertz (hz)
(c) Vitamin C, Potassium, Folate, Vitamin K
(d) Outermost land
(e) Astronomy