Sciences
Altimeter - ANSWERan instrument that uses air
pressure to record height
Anemometer - ANSWERan instrument to
measure wind speed
Angiosperm - ANSWERa group of plans that
produce seeds enclosed within an ovary, which may
mature into a fruit
, Annuals - ANSWERplants that die after one
growing season
Asexual Reproduction - ANSWERreproduction
involving only one parent
Atmosphere - ANSWEREarth's is primarily
nitrogen and oxygen; the troposphere extends from
the surface to about 10km, the stratosphere from
10km to 50km, the mesosphere from 50km to 80km,
and the thermosphere is the atmosphere beyond 80km
(exosphere extends beyond that)
, Aurora Borealis - ANSWERlight emission from
the upper atmosphere that appear in many shapes and
colors
Bacillus - ANSWERa rod-shaped bacteria
Blood - ANSWERfluid that circulates
throughout the body of an animal, distributing
nutrients, and usually oxygen
Canopy - ANSWERa layer of tree branches and
other vegetation elevated above the ground
, Carbon Dioxide - ANSWERa colorless, odorless
gas that is important in the Earth's atmosphere
greenhouse effect
Carcinogen - ANSWERa substance that can lead
to cancer
Carcinoma - ANSWERa malignant tumor which
forms in the skin and outside of internal organs
Carnivore - ANSWERan organism that eats
meat, which includes animals, fungi, and plants