Grade 9 Applied Science

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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
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What is a STAR?
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A large, round celestial object that travels
around a star
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What is a PLANET?
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Everything that exists including all the millions
of galaxies together, plus all the matter, energy
and space
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What is the UNIVERSE?
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Earth is part of this galaxy
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What is the MILKY WAY?
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We see the Moon because it does this
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What is THE MOONREFLECTS LIGHT FROM THE SUN?
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4.6 billion years ago
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What isthe date when Earths Moon was formed?
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Circular or bowl-shaped holes in surfaces caused
by the impact of a celestial object
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What is a CRATER?
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100OC in direct sunlight to -100OC in the shade
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What is RANGE OF SURFACE TEMPERATURES ON THE
MOON?
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Today, the Moon is mostly solid. When it was
formed, it was this
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What is MOLTEN ROCK?
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A thin crust, a very thick mantle, and a small
and partially liquid core
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What are THE THREE INTERIOR LAYERS OF THE MOON?
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Eight
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What is THE NUMBER OF PLANETS IN OUR SOLAR
SYSTEM?
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The closest planet to the Sun.
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What is MERCURY?
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The rings around Saturn are composed of this
material
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What are ICE CRYSTALS?
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The Outer Planets (Jupiter, Saturn, Uranus and
Neptune) are also known by this name
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What is GAS GIANTS?
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This former planet is now classified as a dwarf
planet.
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What is PLUTO?
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300,000 km/s
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What is THE CONSTANT SPEED AT WHICH LIGHT
TRAVELS?
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The time it takes light from the Sun to reach the
Earth
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What is EIGHT MINUTES?
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The distance light travels in one year
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What is a LIGHT YEAR?
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Stars can be red, yellow, white or blue in
colour. The colour of a star depends on this
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What is SURFACE TEMPERATURE?
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The amount of energy released by a star every
second
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What is LUMINOSITY?
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A dark area on the Suns surface that is cooler
than the area surrounding it
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What is SUNSPOT?
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Electrically-charged particles that flow from
the Suns corona out into space
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What is SOLAR WIND?
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Another name for the Northern Lights
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What is the AURORA BOREALIS?
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These produce the Suns energy
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What are NUCLEAR REACTIONS?
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The colour the Northern Lights appear when the
Suns solar wind travel along Earths magnetic
field and strike particles of oxygen
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What is GREEN?