seasons/weather Flashcards
Thermometer
measures temperature in celsius
Barometer
measures air pressure in millibars
Hygrometer
measures humidity in percentages
Wind vane
measures wind direction in compass points
Anemometer
wind speed in kilometer per hour/ meter per second
rain gauge
measures amount of rainfall in millimeters
Axis
An imaginary line around earth
revolution
The motion of one celestial body (such as Earth) around
another (such as the Sun).
rotation
The spinning of a celestial body, such as Earth, about its axis
Equinox
When the Sun appears overhead at the equator and day and night is equal length everywhere. Equinox happens twice a year on about March 21 and September 23.
solstice
When the sun is at its greatest distance from the celestial equator
It takes ____ for Earth to make up one ____ on its axis.
It takes 24 hrs for Earth to make up one rotation on its axis.
One revolution of the Earth takes ________.
One revolution of the Earth takes one year.
Earth is tipped at a ____angle.
Earth is tipped at a 23.5o angle.
Earth’s North Pole ____ points at a reference star called the ______ or _____
Earth’s North Pole always points at a reference star called the North Star or Polaris.
When the North Pole is tilting toward the Sun, it is summer in the Northern Hemisphere. Days are _____ and ____ direct rays hit the hemisphere.
When the North Pole is tilting toward the Sun, it is summer in the Northern Hemisphere. Days are longer and more direct rays hit the hemisphere.
When the North Pole is tilting away from the Sun, it is winter in the Northern Hemisphere. Days are ______ and ____ direct rays hit the hemisphere.
When the North Pole is tilting away from the Sun, it is winter in the Northern Hemisphere. Days are shorter and less direct rays hit the hemisphere.
The 2 days when the Sun’s rays shine straight down on the equator are the ____. There are ____ hours of day and night.
The 2 days when the Sun’s rays shine straight down on the equator are the equinoxes. There are 12 hours of day and night.
The Northern and Southern Hemispheres have _____ seasons.
The Northern and Southern Hemispheres have opposite seasons.
Condensation
The process in which a gas becomes liquid.
Evaporation
The process in which liquid becomes a gas.
Freezing
The process in which liquid becomes a solid.
Evaporation
The process in which liquid becomes a gas.
Precipitation
Process by which water, in any form, falls from the atmosphere to the Earth’s Surface.
Runoff
Process by which water flows over the surface of the ground.
Transpiration
Process by which water evaporates from the leaves of plants.
Water Cycle
The circuit of water movement
Approximately _____ of the Earth is covered in water.
Approximately 75% of the Earth is covered in water.
Most of the Earth’s freshwater is locked up as ice in _____ and in _______
Most of the Earth’s freshwater is locked up as ice in glaciers and in polar caps
When you add the
ocean water and ice together, you find that _____ of Earth’s water is inaccessible to humans.
When you add the
ocean water and ice together, you find that 99.4% of Earth’s water is inaccessible to humans.
If it is Winter in the Northern Hemisphere, what is it in the Southern Hemisphere?
Summer
If it is summer in the Southern Hemisphere, what is it in the Northern Hemisphere?
Winter
water cycle in order-
Collection, evaporation, condensation , precipitation and repeat
why do we have seasons
because the earth is tilte
how many degrees is the earth tilted?
23.5 degrees
how many days does it take to go around the sun?
365 1/4
why do we have 12 months?
4 seasons multiplied by 3 moon cycles equal 12 months
when does summer officially start?
june 21
when does winter officially start?
dec 21
. What percentage of Earth’s water is found in the oceans?
97.25 % of the water is in the oceans.
