Grade 6 - The Moving World Flashcards
A model of earth, that shows how the world looks like. It also shows how Earth rotates on its axis.
Globe
An imaginary line that runs through the center of Earth.
Axis
How many degrees is the Earth’s axis is tilted from the imaginary vertical line that cuts through it.
23 1/2 degrees
What is the speed of Earth’s rotation?
Approximately 1675 kilometers per hour (km/h)
What is the direction of the Earth’s rotation when observed from the Earth’s North Pole?”
counterclockwise
What is the direction of the Earth’s rotation when observed from the Earth’s South Pole?”
clockwise
How long would it take for one complete rotation of Earth on its axis?
24 hours
A day equals to how many hours?
24 hours
What is mean solar day?
A mean solar day is the average length of a day, based on the Earth’s rotation relative to the Sun. It’s about 24 hours, which is the standard day we use, even though the actual length of a day can vary slightly.
How do you know that Earth is spinning on its axis?
The occurrence of day and night is an evidence of Earth’s rotation.
The point in the Earth’s orbit where it is closest to the Sun. It happens once a year, usually occurs around January 3.
Perihelion
The point in the Earth’s orbit where it is farthest from the Sun. It occurs once a year, usually around July 4.
Aphelion
Earth is about ______ away from the sun at aphelion.
152.1 million km
What is the average speed of the Earth as it orbits around the sun in an elliptical orbit?
Approximately 107,000 km/h.
Earth is close to the sun at _______, when in perihelion.
147.1 million km.
How many days does the Earth take to complete one revolution around the Sun?
one year or 365 1/4 days
A year that consists of 366 days is called _____.
leap year
The day of the year when the Sun reaches its highest point in the sky, marking the longest day and shortest night. It usually occurs around June 21st in the Northern Hemisphere.
Summer solstice
When it is summer in the Northern Hemisphere, it is _______ in the Southern Hemisphere.
winter
The day of the year when the Sun is at its lowest point in the sky, resulting in the shortest day and longest night. It typically occurs around December 22nd in the Northern Hemisphere.
Winter solstice
Fall and spring happen between _____ and _____.
summer
winter
Indicates that the length of daytime (12 hours) is equal to the length of nighttime (12 hours).
Equinox
Occurs around March 21st in the Northern Hemisphere. It’s the day when day and night are almost equal in length, marking the beginning of spring.
Spring equinox
The first day of fall called ______ but equinox begins on September 22 or 23.
autumnal
The Philippines experiences only two seasons.
wet
dry
Why is it that the Philippines has only two seasons?
This is because Philippines is located in the northern tropical zone, which is near the equator.
___ season occurs from November to April. This is the period when there is low rainfall.
Dry
Weather patterns in the Philippines depend on the two forms of prevailing winds.
southeast monsoon (habagat)
northeast monsoon (amihan)
Southeast monsoon is active during what months?
May to October
Northeast monsoon is active during what months?
November to early May
PAGASA stands for?
Philippine Atmospheric, Geophysical, and Astronomical Services Administration
Four climate types in the Philippines.
Type 1
Type 2
Type 3
Type 4
(refer to your book for explanation)
Effects of Seasons in the Philippines.
Dry Season:
Hot temperatures: It can get very hot, especially from March to May, with temperatures often reaching over 30°C (86°F).
Drought conditions: Reduced rainfall can lead to drought, affecting agriculture and water supply.
Tourism: This is the peak season for tourism, with many people visiting beaches and outdoor attractions.
Fires: There is a higher risk of fires, both natural and man-made, due to the dry conditions.
Wet Season:
Heavy rainfall: Frequent rains, thunderstorms, and sometimes typhoons or hurricanes.
Flooding: Flooding in urban areas and rural regions can damage crops, infrastructure, and homes.
Agriculture impact: Crops may suffer due to excessive rain, while some regions experience crop failure due to flooding.
Typhoons: The Philippines is often hit by typhoons, which can cause significant damage and loss of life.
The coming of a new ice age in the future may depend on the combination of three factors:
- Slight changes in the size and shape of Earth’s orbit around the sun.
- Slight changes in the tilt or inclination of Earth’s axis.
- Slight changes in the direction of Earth’s axis with respect to the stars.
