SNC1P Name: ______
Date: ______
Unit 4 - Space Exploration
9.2 - Seasons
The Earth is divided into 2 hemispheres: northern & southern.
The Earth's axis is tilted ______º from vertical.
On ______21, the northern hemisphere is tilted the most
toward the Sun. This is called the summer solstice.
On ______21, the northern hemisphere is tilted the most
away from the Sun. This is called the winter solstice.
Image from: http://www.meritnation.com
March 21 is the spring equinox.
September 21 is the autumn
equinox.
Equinoxes are days when the
hours of daylight equal the hours
of ______.
Image from: http://science.howstuffworks.com
**Do questions #1,3,4,5 on page 339**
9.6 - Phases of the Moon
Gravitational force is the force of ______between 2 objects.
-The Earth's gravitational force keeps the ______in orbit around it.
It takes about ______days for the Moon to revolve (orbit) around the Earth.
It also takes about ______days for the Moon to rotate (spin) around its axis.
*We always see the same side of the Moon.*
The lunar cycle is the sequence of ______made by the Moon during one orbit around the Earth.
**Do questions #1,2,4 on page 350**
9.7 - Eclipses
The Sun and Moon appear to be about the same size when viewed from the Earth.
A solar eclipse is when the ______blocks some or all of the Sun's light from the Earth. They are very rare.
A lunar eclipse is when the ______blocks some or all of the Sun's light from the Moon. They are much more common. There was one visible in Toronto on October 8th, 2014
**Do questions #1,2,3 on page 352**
solar eclipse waning equinoxes lunar cycle
waxing gravitational force solstices lunar eclipse
Key Term: / Definition:days when Earth's axis is most tilted toward or away from the Sun
days when the hours of daylight equal the hours of darkness
the force of attraction between two massive objects
the sequence of phases made by the Moon during one orbit around the Earth
increasing in size
decreasing in size
when the Moon blocks some or all of the Sun's light from the Earth
when the Earth blocks some or all of the Sun's light from the Moon