Celestial Bodies

Question 1

Celestial bodies

Answer 1

General name for an object in space

Question 2

Meteor

Answer 2

Solid object from outer space that enters the earths atmosphere

Question 3

Asteroid

Answer 3

Rocky celestial object greater than 1m, smaller than a planet and orbits the sun.

Question 4

Comet

Answer 4

Ball of frozen gas, ice, rock and dust with a highly elliptical orbit.
highly elliptical- orbit looks more like an oval than a circle

Question 5

Planet

Answer 5

any object that orbits a star, is large enough to form a rough sphere under its own gravity and has cleared its orbit

Question 6

terrestrial planets eg

Answer 6

mercury, venus earth mars

Question 7

jovian planets eg

Answer 7

jupiter saturn uranus neptune

Question 8

Terrestrial planets

Answer 8

or rocky planet, is a planet that is composed primarily of silicate rocks or metals.

Question 9

Jovian planets

Answer 9

a gas/ice giant, means they are like Jupiter

Question 10

moon

Answer 10

Any natural satellite of any planet

Question 11

star

Answer 11

A ball of gas that emits light and heat due to nuclear explosions in its core

Question 12

Dwarf planets

Answer 12

Small planets that dont quite meet the def. of a planet
lack the gravitational forces needed to clear the material found in their orbits.

Question 13

Exoplanets

Answer 13

planets orbiting a star other than our own

Question 14

What is a black hole

Answer 14

star with a strong force of gravity that light cant escape from it.

Question 15

Solar system

Answer 15

star and all the objects that orbit

Question 16

Geocentric model

Answer 16

Earth was the centre of the universe and everything orbited around it (Aristotle)

Question 17

Heliocentric model

Answer 17

the sun was the centre, celestial bodies moved around the sun in fixed orbits (Copernicus)

Question 18

Law of Planetary Motion

Answer 18

A planets orbit has an ellipse shape that travels around the sun

Question 19

The Big Bang Theoiry

Answer 19

The universe is expanding, all objects are moving away from each other (singularity)

the concept that the universe began as a single point (singularity) and kept expanding, with all objects moving away from each other

Question 20

Galaxy

Answer 20

huge collection of gas, dust and billions of stars and the solar systems held together by gravity

Question 21

Two main types of telescope?

Answer 21

radio and optical

Question 22

What did Hubble and milton Humason discover

Answer 22

The Big Bang Theroy

Question 23

Singularity

Answer 23

our universe emerged from a singularity — a point of infinite density and gravity

Question 24

Gravity

Answer 24

A force that attracts objects to each other

Question 25

Calculate weight (N)

Answer 25

Weight (N) = Mass (Kg) x Gravity (m/s^2)

Question 26

What are the key pieces of evidence that support the Big Bang Theory?

Answer 26

-Scientists have proven that the earth is constantly expanding

-The universe was formed from a singularity (idk)

-Cosmic Microwave Background Radiation (CMBR): the energy leftover from the original explosion.