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7 Science
Quiz 4.2
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earth's rotation
- gives us the daily alternation of day and night
as it rotates, parts of the earth move into the position facing the sun which we call
day
slowly moves back into the shadow which we call
night
complete rotation
- from sunrise to the next sunrise or from sunset to next sunset.
year
- complete revolution around the sun
a year is equivalent to
365
earth rotations or solar days
the earth rotates from
west
to
east
sun rises in the
east
sun sets in the
west
The highest point of the sun is its
zenith.
It is the highest altitude
The altitude of the sun is higher during the
hot
months
the earth slants from the vertical at an angle of
23.5
degrees
tilt
- one of the most important characteristics of the Earth
Days
are longer during the summer months and
nights
are shorter
In the cold months, we have
shorter
days and
longer
nights
The varied amount of sunlight cause the changes of the
seasons
The
equator
receives direct rays of light all year round
spring
and
fall
equinox
- axis tipped neither nor away
winter
solstice
- axis tipped away
summer solstice
- axis tilted towards sun
The Philippines is locate above the Equator (
4áµ’ North
and
21áµ’ North
)
Our country’s average temperature ranges from
25áµ’C
to
32áµ’C
The average humidity in the country is around
77%
tag-araw =
march
-
may
tag-ulan =
june
-
october
tag-lamig =
november
to
february
May
is the hottest month and
January
is the coldest
Climate classifications were made based on the amount of
rainfall
for a particular area
Type
I
– There are two pronounce seasons, wet and dry seasons
Type II
– There is no dry season
Type III
– The seasons are not very distinct
Type IV
– Rainfall is spread throughout the year
january
20
,
1955
- A total solar eclipse occurred. It lasted for about 7 minutes
moon's distance from Earth is
384
000
kilometers
moon's diameter is
3
474
km
Earth's diameter is
12 742
km
moon orbits the earth for
27.3
days
moon has
8
phases
sun's diameter of
1 391 000
kilometers
sun
- It is a huge light source so both earth and moon have shadows that extend far our into space
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