Grade 9 Applied Science – Astronomy 1 The Night SkyThe MoonThe PlanetsThe StarsThe Sun 11111 22222 33333 44444 55555.

Grade 9 Applied Science – Astronomy 1

The Night Sky The Moon The Planets The Stars The Sun

1 1 1 1 1

2 2 2 2 2

3 3 3 3 3

4 4 4 4 4

5 5 5 5 5

A massive collection of gases in space that produce and

emit light energy

What is a STAR?

A large, round celestial object that travels

around a star

What is a PLANET?

Everything that exists including all the millions of

galaxies together, plus all the matter, energy and space

What is the UNIVERSE?

Earth is part of this galaxy

What is the MILKY WAY?

We see the Moon because it does this

What is THE MOON

REFLECTS LIGHT FROM THE SUN?

4.6 billion years ago

What isthe date when Earth’s Moon

was formed?

Circular or bowl-shaped holes in surfaces caused by the impact of a celestial object

What is a CRATER?

100OC in direct sunlight to

-100OC in the shade

What is RANGE OF

SURFACE TEMPERATURES ON THE MOON?

Today, the Moon is mostly solid. When it was formed, it

was this

What is MOLTEN ROCK?

A thin crust, a very thick mantle, and a small and

partially liquid core

What are THE THREE INTERIOR

LAYERS OF THE MOON?

Eight

What is THE NUMBER OF PLANETS IN OUR SOLAR SYSTEM?

The closest planet to the Sun.

What is MERCURY?

The rings around Saturn are composed of this material

What are ICE CRYSTALS?

The Outer Planets (Jupiter, Saturn, Uranus and Neptune) are also known by this name

What is GAS GIANTS?

This former planet is now classified as a dwarf planet.

What is PLUTO?

300,000 km/s

What is THE CONSTANT SPEED AT WHICH LIGHT TRAVELS?

The time it takes light from the Sun to reach the Earth

What is EIGHT MINUTES?

The distance light travels in one year

What is a LIGHT YEAR?

Stars can be red, yellow, white or blue in colour. The colour of a star depends on

this

What is SURFACE TEMPERATURE?

The amount of energy released by a star every

second

What is LUMINOSITY?

A dark area on the Sun’s surface that is cooler than the

area surrounding it

What is SUNSPOT?

Electrically-charged particles that flow from the Sun’s corona out into space

What is SOLAR WIND?

Another name for the Northern Lights

What is the AURORA BOREALIS?

These produce the Sun’s energy

What are NUCLEAR REACTIONS?

The colour the Northern Lights appear when the Sun’s solar wind travel along Earth’s magnetic

field and strike particles of oxygen

What is GREEN?