Our Universe Test - 1
| Description: This test helps the student to revise on the topic. | |
| Number of Questions: 25 | |
| Created by: Vijay Palan | |
| Tags: galaxy solar system planets etc Our Environment |
The Earth-centered view of the universe is called as_______.
____, a Greek astronomer, explained how the phases of the Moon are caused.
Sun-centered is called as______.
______was a German astronomer who discovered that all planets have elliptical orbits.
The path of each planet around the Sun is ____with the Sun at one focus.
Galileo's greatest contributions to physics are the laws of falling bodies and _____motions.
A planet covers equal area of its orbit in equal periods of time according to ______.
The period of ____of a planet is proportional to its distance from the Sun.
The gravitational force between two objects is directly proportional to the masses of the objects and inversely proportional to the square of the distance between them. This law is called as_______.
A body will continue in a state of rest, or uniform motion in a _______, unless an external force acts on it.
In solar system, stars and galaxies are called as the ______of the universe.
The Sun and its planets and all the objects moving around them collectively form the _____.
Atoms combine to form molecules which eventually form clouds of gas and dust are called _______.
Only one______body in the solar system is the Sun.
The ______which was formed 5 billion years after the explosion is the home of the earth and the solar system.
__and __are called inferior planets because they lie closer to the Sun than the Earth.
Sun is made up of hot burning gases. The most prominent are ______ and ______.
The giant planets Jupiter, Saturn and Neptune are also known as _____planets.
All the planets which have their orbits outside the earth's orbit are called ______.
Venus is surrounded by a thick cloud cover hence known as _____.
Earth's atmosphere allows sunlight to pass through but filters out harmful radiations like ____.
The geological process by which the Earth came to have its present interior structure is called ____.
The crust is the outermost layer of rock which envelops the interior of the Earth also known as ______.
The boundary between the crust and the mantle is called the ________.
The Earth's shape is an oblate spheroid or _____.