Download Name: Block: ______ Science 9 – Ch.12 the Solar System 12.4 – A

Name: ___________________________
Block: __________
Science 9 – Ch.12 the Solar System
12.4 – A Closer look at the planets
The Sun and most of the planets have a magnetic field that extends into space.
Terrestrial (Inner) Planets

High densities, slow rotations, solid metal cores (usually iron),
solid surfaces, no rings.
1.
_________________

Planet ____________________ to the Sun.

Day time temperature: ________ degrees

Night time: ________degrees

Not visible in the night sky but visible just before sunrise and after sunset.

____________________________ revolution speed.

The ___________ (dimples) on the surface are caused by the collision of the rocks and
meteorites.
 will be seen passing in front of the sun (__________) in 2016
2. ___________________

Atmosphere consists of mainly ________

______________________on the surface

__________________ object you can see in the sky

Earth and Venus have __________________________they
both have similar sizes, composition, distance to the Sun.

Unlike Earth Venus has ______ ocean and rotates in __________________ direction.
 next transit will be June 6, 2012
3.
_______________

Contains mostly ___________________________

Earth has a wide variation of temperature between the poles and
the equator, range from about ____________________________

About __________ of Earth’s surface is covered by
______________ (oceans, rivers, lakes, snow, ice)
4.
________________

Also called as “______________________” because of its
reddish soil, the surface temperature from ______________

Dry and barren planet but there is evidence that Mars had
volcanoes, glaciers and floods of water. Scientists believed
that life may have existed on Mars.
Gas Giants (Outer) Planets:

Low densities, mainly hydrogen and helium gases, much bigger than terrestrial
planets.
1.
___________________

____________ planet in the solar system

Has ___________moons

Famous for its _________________bands
2.
____________________

______________________planet in the solar system

Has ___________________________ rings

Has ___________ moons
3.
_________________

Mainly ___________ gas_____________________________________

It’s diameter __________________________ but almost invisible to Earth because
Uranus is so far away

Spins on its ________, rotates in the ____________direction as Earth
4.
___________________

Some thin rings

Has ________________________________

Has 13 moons
Other objects in the Solar System:
1. ____________________

Was once considered as a planet

_______________________ the distance of Uranus from the Sun

Made up of ______________________________ similar to a comet

Has 2 moons
Distances in the Solar System:
 The Kuiper Belt is _________________ collection of thousands of small, icy bodies

The distances to the planets and other objects in our solar system are
__________, so it is convenient to use astronomical units, instead of kilometres,
when referring to these distances. An ______________________ (AU)

The Earth is not always the same distance from the Sun. An AU is equal to
__________________ km. It takes ____________ for light to travel from the Sun to
the Earth,traveling at the speed of light, of course.
The Moon, the closest solar system body to us, is about ____________ away from the
Earth, which means it takes about _____________ for radio signal from Earth to reach
the Moon and travel back
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
To memorize the order of the planets:
Michael very eagerly made a jelly sandwich under no protest
(Mercury, Venus, Earth, Mars, Asteroid Belt, Jupiter, Saturn, Uranus, Neptune, Pluto)
HW: CYU pg. 394 Q 1, 3, 9, 17, 18, 19; Quiz 12.3 – 12.4 next class