grade 9 applied science – astronomy 1 the night skythe moonthe planetsthe starsthe sun 11111 22222...
TRANSCRIPT
Grade 9 Applied Science – Astronomy 1
The Night Sky The Moon The Planets The Stars The Sun
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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?