A
B
C
D
E
100

The natural ridges formed when water flow causes sediments to drop along the edge of a river's channel

What is a levee?

100

Most destructive force of a hurricane

What is wind?

100
The time for the moon to orbit the earth and go through all the phases

What is a (lunar) month?

100

A meteor that lands on Earths surface

What is a meteorite?

100

The circular pacts that the oceans surface currents move in

What are gyres?

200

Planet with the fastest rotation

What is Jupiter?

200

Type of satellite that relays phone communications, transmits TV broadcasts, and receives radio services

What is a communication satellite?

200

Point on the celestial sphere that is directly below the observer

What is a nadir?

200

Used to measure the distance from the ground to the base of the clouds

What is a ceilometer?

200

Calendar that has a leap year every four years with no exceptions

What is a Julian calendar?

300

Change in the light that is observed from a star moving toward the Earth

What is a blueshift?

300
Flame like column of gas that erupts from the chromosphere

What is a spicule?

300

Constellation that contains the brightest summer star

What is Lyra?

300

Type of galaxy that is flat with a bulging nucleus and a solid disk

What is a lenticular galaxy?
300

Space program that first landed a man on the moon

What is the Apollo?

400

A device that safely starts and controls a fission chain reaction

What is a nuclear reactor?

400

Type of orbit that crosses the equator at the same local mean solar time on every orbit

What is a sun synchronous orbit?

400

Group of long living halogen compounds that are supposedly the cause of ozone depletion

What are CFCs?

400

System in which two stars are bound together by gravity

What is a binary star?

400

A person who believes humans are merely passing through the earth and have no claim to anything

What is a preservationist?

500

Group of biogeochemical cycles that recycle nutrients found in soil and rock

What are sedimentary cycles?

500

Type of pollution that does a water to energy incinerator help reduce

What is land pollution?

500

Useful fire fighting chemicals that were restricted under the Montreal Protocol

What are halons?

500

Time period that had average global temperatures warmer than at present

What is the Medieval Climate Optimum?

500

U.S. laws, amendments, and extensions that control air poll

What are the Clean Air Acts?