Question

T
(a) Earth has a layer of air surrounding it composed of 21% Nitrogen and
50% Oxygen and the rest carbon dioxide.
(b) Jupiter keep the large rocks away from the earth by its strong gravity.
(c) The core of the Earth has silica and iron.
(d) The circumference of the Earth is about 40,000 Km.
(e) The Bedford Level experiment was performed by Bedford.
(f) The term Geoid means 'earth shaped'.
Fill in the blanks with appropriate words
1 mark
(a) Around 350 B.C. the great chauistotle first declared that the earth was round.
between the zenith
(b) At 45° latitude an observer finds the North Star
and the horizon.
(c) Aeroplanes can fly round the Earth following
(d) The shape of the Earth with two flattened ends and a bulge at the equator is
3
called an oblate
1 mark
4 Answer in word or words
(a) Who first observed the Earth's shape as an oblate spheroid ?
(b) Where on Earth is the weight of an object measured by a spring balance, the greatest ?
(c) What is the length of Earth's Polar diameter ?1217
(d) What determines the size of a planet ? diameter
(e) What are the large holes on the surface of the moon called ? ena te
in the full form of GPS ? globa pogih oring system​

Answer 1

Answer:

its all 100 m

Explanation:

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