Programmed Learning Online Test

In the first century A.D. Ptolemy, a Greek astronomer said that the sun and the other planets move around the earth in circular paths. According to Ptolemy the earth is at the C .. .. .. .. .. (Fill in the blank using 5 more letters) and the sun and the planets move around it.
Core
Centre
Ptolemy’s theory was based on observing and believing the apparent motion of the sun planets and stars around the earth which seems to be………..
Moving
Static
In the sixteenth century A.D. Copernicus discovered that the earth is not stationary but is moving along with other planets around the sun. The discovery of Copernicus was that the earth is ….. (put a word in the blank).
Moving
Static
Ptolemy said that the sun and the planets go round the earth. But Copernicus proved that actually the earth and the other planets go round the sun. We can say that the Ptolemy’s theory is ………….
Disproved
Proved
Later on another astronomer called Kepler derived certain laws related to the motion of planets around the sun. Kepler’s law dealt with planetary…
Static
Motion
Kepler proved that the planets do not move in circular paths around the sun but they move in elliptical paths around the sun. According to Kepler the path of any planet around the sun is……………
Elliptical
Circular
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Ali Muntajeeb
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