Fill In the Blank 1
Darwin based his evolutionary idea on
natural selection
This gemstone consists of corundum with traces of iron or titaniunum that gives is a distinct blue color
sapphire
The natural ridge formed when water flows causes sediments to drop along the edge of the rivers channel is called
levee
What is a system that removes certain gases and particles from industrial exhaust?
scrubber
This type of satellite can relay telephone conversations, transmit television broadcasts and receive radio services
communication satellite
This view claims that understanding modern geological processes is the key to understanding the earths geologic history
uniformitarism
This is the main agent in chemical weathering
water
The Russian spacecraft that has become the primary way for astronauts to get to the ISS is called
Soyuz
What term describes someone who believes humans are merely passing through the earth and have no claim to anything on it
preservationist
This type of orbit crosses the equator at the same local mean solar time on every orbit
sun-synchronous orbit
The hills that form when advancing glaciers overrun old piles of till
drumlins
breccia
The oceans surface currents move in circular paths called
gyres
What group of long living halogen compounds are supposedly the primary cause of ozone depletion?
chlorofluorocarbons
The process in which an atom of an element with a large nucleus breaks into two atoms and elements with small nuclei is
nuclear fission
This layer of soil contains less organic material and more mineral material than other layers
subsoil
This type of volcano pour out highly fluid lava during its mild eruptions to produce a broad gently sloping cone
shield volcano
Astronomers divide the celestial sphere in to 88 zones called
constellations
What is a device that safely starts and controls a fission chain reaction called?
nuclear reactor
The introduction of harmful chemicals or microscopic solids in the atmosphere
air pollution
This forms when rocks along one side of a fault move horizontally along the fault
strike slip fault
A combination of three air masses that form a Y shaped front
occuluded front
The time for the moon to orbit the earth and go through all the phases is a
lunar month
What are the US laws, amendments and extensions that control air pollution on a national level
Clean Air Acts
This time period had average global temperatures warmer than at present
Medieval Climate Optimum