instrument used to determine wind speed.

climates that are extremely dry with low precipitation

September 23, when the sun's direct rays are at the equator, entire Earth has 12 hours of daylight and 12 hours of darkness

the universe was created about 15 billion years ago

shortening of starlight as it moves towards you

the breaking down of rocks to form a new substance

a triangle-shaped area of deposition located at the mouth of an older river

temperature at which water vapor condenses into liquid water

temperature of the air

location on Earth's surface directly above the focus of an earthquake

rock that forms on Earth's surface

light colored, low density

the boundary between two air masses

a model at which Earth is the center of the universe

water vapor, methane, carbon dioxide

a model at which the Sun is the center of the universe

water sinking into the ground

(Jupiter, Saturn, Uranus, Neptune)lower density, larger size

the side opposite from the prevailing wind direction

sun, moon, earth.

sun, earth, moon.

seasonal wind pattern changes that cause rainy and dry seasons

tide with the smallest tidal range; during both quarter phases

starlight moving away from you

(Mercury, Venus, Earth, and Mars); high density, smaller size

side facing the wind

the physical or chemical breaking down of rocks