Earth And Space

Question 1

Astronomy

Answer 1

The study of the universe and everything in it

Question 2

Geocentric

Answer 2

The sun,moon,planets and stars all orbit the earth which does not move

Question 3

Heliocentric

Answer 3

Planets orbit the sun instead of the earth

Question 4

Universe

Answer 4

Made up of everything that exists including planets,stars,galaxies and all form of matter and energy

Question 5

Big Bang

Answer 5

Is an idea that scientists use to explain how our universe was formed
We think the Big Bang theory is the prevailing cosmological model for the observable universe

Question 6

Galaxy

Answer 6

A large group of stars,dust,gas and dark matter held together by gravity

Question 7

Antimatter

Answer 7

The mirror image of matter.Every particle of matter has a corresponding particle of antimatter

Question 8

Hypothesis

Answer 8

Collection of ideas that seem to explain what is observed:predictions that can be tested

Question 9

Models

Answer 9

Describe reality based on hypothesis that have withstood observational and experimental tests:explains with mathematics properties and behavior of some object or phenomenon

Question 10

Theory

Answer 10

Series of well tested hypothesis that together form a self consistent and accurate description of nature:cable of making predictions that can be tested and verified by anyone

Question 11

Laws

Answer 11

Proven theories that have stood the test of time and have broad applications

Question 12

Constellation

Answer 12

There are 88 constellations covering the entire sky

Question 13

Ecliptic plane

Answer 13

Plane of earths orbit around the sun,the orbit is not quite an eclipse it is a squashed circle

Question 14

Asteroid

Answer 14

a small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter though some have more eccentric orbits

Question 15

Solar system

Answer 15

the collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets

Question 16

Celestial body

Answer 16

a celestial body is any natural body outside of the Earth’s atmosphere. Easy examples are the Moon, Sun and the other planets of our solar system. But those are very limited examples. The Kuiper belt contains many celestial bodies. Any asteroid in space is a celestial body

Question 17

Planet

Answer 17

a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has “cleared its neighbourhood” of smaller objects around its orbit

Question 18

Moon

Answer 18

The Moon is Earth’s largest natural satellite, and we usually see it in the night sky. Some other planets also have moons or natural satellites

Question 19

Star

Answer 19

a fixed luminous point in the night sky which is a large, remote incandescent body like the sun

Question 20

Sun

Answer 20

the star round which the earth orbits

Question 21

Light-years

Answer 21

a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 million million miles).

Question 22

Comet

Answer 22

a celestial object consisting of a nucleus of ice and dust and, when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun