Chapter 2: The Uniqueness of the Earth Flashcards
(28 cards)
What is the distance of the Earth from the Sun?
150 million km
The duration of a single rotation of the Earth is:
23 hours and 56 minutes
The speed of rotation of the Earth is ______ per second and the speed of revolution is _____ per second
- 46 km
29. 8 km
How long does it take for the Earth to complete a rotation?
365 days and 6 hours
Equatorial diameter:
Polar diameter:
12756 km
12714 km
The average surface temperature of Mercury:
167 degrees Celsius
What are the factors that contribute to the Earth being a habitat of living beings?
Existence of water
Existence of gravity
Existence of an atmosphere with favorable gases and water vapor
Prevalence of an intermediate temperature
Rotation and revolution
Latitudes are:
The imaginary lines drawn from East to West on the geographical globe
What are the important latitudes?
The Equator - 0 degrees The Tropic of Capricorn The Tropic of Cancer The Arctic Circle The Antarctic Circle
Define longitudes
The imaginary lines drawn from North to South on the geographical globe
Rotation is _____________________________________
The movement of the Earth around its’ own axis
The Earth tilts at _____________________
23.5 degrees to the orbital plane
The Earth rotates from _____ to _____
West to East
The rotation of the Earth results in:
The occurrence of day and night
Regional time difference
The Sun is directly over the Equator on the _____________ and it is called the _______________ or _____________
21st of March
Vernal Equinox
Spring Equinox
The Sun is directly over the Equator on the _________ and it is called the Autumnal or Fall Equinox
23rd of September
The Sun is directly over the Tropic of Capricorn on the _______________ and it is called the ____________
22nd of December
Winter Solstice
The Sun is directly over the Tropic of Cancer on the _________ and it is called the _____________
21st of June
Summer Solstice
During the Summer Solstice, daytime is longer in the:
Northern Hemisphere
During the Winter Solstice, daytime is longer in the:
Southern Hemisphere
Summer sets in for the Northern Hemisphere in ____ and for the Southern Hemisphere in ______________
June
December
Autumn sets in for the Northern Hemisphere in ____ and for the Southern Hemisphere in ______
September
March
Winter sets in for the Northern Hemisphere in _____ and the Southern Hemisphere in ______
December
June
Spring sets in for the Northern Hemisphere in _____ and the Southern Hemisphere in _______
March
September
