Answer:
The correct statement for comet is - ( a ) They have highly elliptical orbits around the sun
Explanation:
The comet is made up by the composition of dust , water , ice , rock and frozen gases like , the carbon dioxide , methane , ammonia and carbon monoxide .
Comet shows a process called outgassing , i.e. , the comet passes close to the sun , then they start to release gases , which is visible in the form of a comet's tail .
The comet and its tail glows by the sun and becomes visible when the comet passes through the solar system , because the dust partials reflects sunlight directly and the gas glows due to ionization process.
The orbital of comet is usually highly eccentric elliptical path .
The type of roch that makes up the andes mountains in south america are called igneous rocks
It is Egypt. The river Nile runs through the city and Tahrir square (a big museum full of Egyptian artefacts) is right in the centre of the city.
Clastic, chemical, and organic are the three main types of (<span>c. sedimentary rocks)
</span>which rock is formed from organisms? (<span>b. coal)</span>
Answer: Option (A) and (C)
Explanation: In case of slow sea floor spreading, the magma within the crust doesn't get proper way to exert the force upward because of its slower rate of spreading. Due to this, rifting occurs along the mid oceanic ridge.
Due to continuous rifting, it forms a valley known as the rift valley. This rift valley lacks in ridge and is comparatively smooth compared to a fast spreading sea floor, in which the topography appears to be rough and ridges are formed.
Thus, the statements that are true are option (A) and (C).
