fresh water
tiny algae and animals floating on ocean's surface
plankton
wise use of a resource so it won't be used up
conservation
device that goes between earth and space
shuttle
most abundant gas in atmosphere
nitrogen
force propelling object forward
thrust
process of supplying water to land to make suitable for crops
irrigation
process in which molecules at the surface of liquid absorb enough energy to change to gaseous state
evaporation
spacecraft best suited to explore different planets than Earth
probe
particles of carbon that enter the air when wood is burned
soot
speed in a given direction
velocity
cold and warm ocean water carried around the world
currents
process in which water is given off through leaves
transpiration
as the density of aior decreases, its pressure....
decreases
one cause of acid rain is when coal burns it contains a lot of this substance
sulfur
device that expels gas in one direction to move in opposite direction
rocket
This causes ocean currents to curve to the right in Northern Hemisphere
Coriolis effect
ampount of substance in volume of another substance
concentration
gas in the atmosphere that varies in different places from time to time
water vapor
force per unit area
pressure
velocity a rocket must reac to reach beyond a planet's gravitational pull
escape velocity
coastal area where fresh and salt water mixes
estuary
farming of saltwater and freshwater organisms
aquaculture
air pressure is often measured in this
millibars
4 main layers of atmosphere are classified according to this
temperatuire
velocity a rocket must achieve to orbit
orbital velocity