Question

Choose the word which can be substituted for the given words/sentence.
A fixed orbit in space in relation to the earth.
A) Geological
B) Geo-synchronous
C) Geocentric
D) Geo- stationary

Answer 1

Hint: Orbit is a circular path on which a planet or any celestial body revolves around a moon or sun. It is a curved path not necessarily circular. Therefore, a fixed orbit means a fixed path i.e. the planet / celestial body moves at the same distance from the sun/moon/star.

Complete answer:
Let us first understand the meaning of the given options:
A) Geological- Geology is a branch of science that deals with the study of the surface of Earth. Geological means are related to geology or the features of the Earth. E.g. Geological studies are the studies related to igneous, sedimentary and metamorphic rocks.
B) Geo-synchronous- It is a term related to the satellite. Geo means earth and synchronous means syncing /occurring at the same time. In a high earth orbit, the satellite syncs with the rotation of the earth and thus appears stationary.
C) Geocentric- Geo means earth and centric means related to the centre. Therefore, geocentric means related to the centre of the earth.
D) Geostationary- Geo means Earth and stationary means ‘not moving’. Geo- stationary refers to something (especially a satellite) which is placed above the surface of the earth but appears to show no movement/stationary.

Therefore option D, Geo-stationary, is the correct answer. Geo means earth and stationary means a fixed orbit or not moving orbit in space.

Note: Adjectives tell us about the quality or quantity of a noun. Geo-stationary is an adjective that shows the quality of an object/orbit/satellite as being fixed in space, above the earth. For E.g. Geostationary satellites send still pictures of the Earth.