Earth and space

Question 1

Astronomy

Answer 1

The study of space

Question 2

Big Bang

Answer 2

An idea that scientists used to explain how our universe was made, it started off as a mass that was hot and dense and then exploded

Question 3

Galaxy

Answer 3

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

Question 4

Antimatter

Answer 4

The mirror image of matter every particle of matter has a corresponding particle of antimatter

Question 5

Hypothesis

Answer 5

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

Question 6

Models

Answer 6

Describes reality based on hypothesis that have withstood observational and experimental tests

Question 7

Theory

Answer 7

Series of well tested hypotheses that together form a self-consistent and accurate description of nature

Question 8

Laws

Answer 8

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

Question 9

Constellations

Answer 9

Are grouped forming images in the sky there are 88 of the covering the entire sky

Question 10

Ecliptic plane

Answer 10

Plane of orbit around the sun (not exact circle)

Question 11

Asteroid meaning

Answer 11

Asteroids are minor planets, especially of the inner Solar System. Larger asteroids have also been called planetoids.Asteroids are lumps of rock that orbit the sun. They are too small too be classified to be planets.Thought to be left over from the time of the formation of the universe.The asteroid belt lies between the orbits mars and Jupiter

Question 12

Geocentric

Answer 12

having or representing the earth as the centre, as in former astronomical systems

Question 13

Heliocentric

Answer 13

measured from or considered in relation to the centre of the sun

Question 14

Universe

Answer 14

The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy

Question 15

Solar system

Answer 15

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly

Question 16

Celestial body

Answer 16

By definition 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

Question 17

Planet

Answer 17

a celestial body moving in an elliptical orbit round a star

Question 18

Moon

Answer 18

the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.

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-year

Answer 21

a unit of astronomical distance equivalent to the distance that light travels in one year

Question 22

Asteroid

Answer 22

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 23

Comet

Answer 23

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

Question 24

Terrestrial planets

Answer 24

A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals

Question 25

Gas giants

Answer 25

DescriptionA gas giant is a giant planet composed mainly of hydrogen and helium. Gas giants are sometimes known as failed stars because they contain the same basic elements as a star.

Question 26

Gravity

Answer 26

the force that attracts a body towards the centre of the earth, or towards any other physical body having mass

Question 27

Force field

Answer 27

chiefly in science fiction) an invisible barrier of force.

Question 28

Distance

Answer 28

the length of the space between two points

Question 29

Speed

Answer 29

the rate at which someone or something moves or operates or is able to move or operate.

Question 30

Time

Answer 30

the indefinite continued progress of existence and events in the past, present, and future regarded as a whole.