Science Grade 9 Space unit

Question 1

What is Astronomy

Answer 1

The scientific study of what is beyond earth

Question 2

What is a Celestial object

Answer 2

Any object that exits in space

Question 3

What is a solar system

Answer 3

A star and all the objects that travel (orbit) around it

Question 4

What is a universe

Answer 4

All of space and everything in it, including energy and matter

Question 5

What is a star

Answer 5

A ball of gas that mostly consists of helium and hydrogen held together by its gravity

Question 6

What is a planet

Answer 6

A celestial object that orbits the sun

Question 7

How many planets are there & name them all

Answer 7

There are 8 planets, Mercury(1) Venus(2) Earth(3) Mars(4) Jupiter(5) Saturn(6) Uranus(7) and Neptune(8)

Question 8

What are terrestrial planets

Answer 8

The 4 closest to the Sun. They have a hard & rocky surface, and an atmosphere

Question 9

What are the gas giants

Answer 9

The 4 outer planets composed of mostly gasses & liquids

Question 10

Satellite

Answer 10

A celestial object that travels around another celestial object in a close path

Question 11

Orbit

Answer 11

A close path that celestial and satellites travel around another celestial object.

Question 12

Galaxy

Answer 12

a huge collection of gas, dust, stars, planet,s and other celestial objects.

Question 13

How long has the sun been around

Answer 13

The sun has been around for almost 5 Billion years

Question 14

Why is the sun important

Answer 14

The sun gives us heat, keeps our water in a liquid state and gives energy for the plants to grow

Question 15

How many layers does the sun have

Answer 15

The sun has 5 layers

Question 16

What are the five layers of the sun

Answer 16

The core, radiation zone, convection zone, photo sphere, and the sun’s atmosphere

Question 17

Core

Answer 17

The hottest part of the sun, it has high pressure that causes gas particles to collide into one another causing nuclear fusion

Question 18

Radiation zone

Answer 18

surrounds the core, the energy released by the nuclear fusion travels here.

Question 19

Convection zone

Answer 19

it is extremely hard for energy to get up here from the radiation zone, hotter substances rise as colder ones fall creating an infinite loop.

Question 20

Photo sphere

Answer 20

the visible part of the sun, the average temperature is 5500 Celsius

Question 21

Sun’s atmosphere

Answer 21

divided into two layers; the corona and chromosphere

Question 22

Corona

Answer 22

the outer atmosphere it extends millions of kilometers into space

Question 23

chromosphere

Answer 23

its the inner atmosphere its 60 000 Celsius hotter then the photshpere

Question 24

How much time does it take for the sun to complete 1 rotation

Answer 24

It takes 25 days

Question 25

Sunspots

Answer 25

Dark spots appearing on the sun that are cooler than areas around them.

Question 26

Solar flares

Answer 26

gasses and charged particles released above an active sun spot.

Question 27

solar prominence

Answer 27

slow low-energy gas ejections that travel through the corona, extending thousands of kilometers into space

Question 28

what are auroras

Answer 28

auroras happen when earths atmosphere and solar winds come into contact causing green light to be seen from earth

Question 29

What is communication distribution

Answer 29

Comunicatio distribution is when the suns solar activity damaging artificial satellites.

Question 30

What measurements do we use in space

Answer 30

AU (Astrnomical units)

Question 31

How much km is 1 AU

Answer 31

150 000 000; 150m

Question 32

What does a celestial object need to be considered a plante

Answer 32

Orbit the sun, have enough mass to be pulled into a stable sphere shape by gravity, and lastly it must dominate its orbit

Question 33

What is a dwarf planet

Answer 33

A celestial object that orbits the sun and has a sphere shape, but it does not dominate its orbit

Question 34

Asteroids

Answer 34

A small celestial object that orbits the sun and is made up of rocks and metals

Question 35

Meteoroid

Answer 35

A large piece of metal or rock in the solar system that is to small to be considered to be a asteroid

Question 36

where do meteors and asteroids come from

Answer 36

they come from the asteroid belt located between mars and Jupiter

Question 37

comets

Answer 37

Large chunk of ice, rock and dust that orbits the sun.

Question 38

where do comets come from

Answer 38

short period comets come from the Kupier belt and long period come from the Oort cloud