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altimeter ✔Correct Answer-an instrument that uses air pressure to record height, such as the
height of a plane
anemometer ✔Correct Answer-an instrument to measure wind speed
angiosperm ✔Correct Answer-a group of plants that produce seeds enclosed within an ovary,
which may mature into a fruit
annuals ✔Correct Answer-plants that die after one growing season
asexual reproduction ✔Correct Answer-reproduction involving only one parent
atmosphere ✔Correct Answer-the Earth's atmosphere is primarily nitrogen and oxygen. The
atmosphere extends from the surface to about 10 km; the stratosphere from 10 km to 50 km; the
mesosphere from 50 km to 80 km; and there thermosphere is the atmosphere beyond 80 km
aurora borealis (northern lights) ✔Correct Answer-light emission from the upper atmosphere that
appear in many shapes and colors
bacillus ✔Correct Answer-a rod-shaped bacteria
blood ✔Correct Answer-fluid that circulates throughout the body of an animal, distributing
nutrients, and usually oxygen
canopy ✔Correct Answer-a layer of tree branches and other vegetation elevated above the ground
Carbon Dioxide (CO2) ✔Correct Answer-an colorless, odorless gas that is important in the Earth's
atmospheric greenhouse effect. From CO2 is dry ice.
carcinogen ✔Correct Answer-a substance that can lead to cancer
carcinoma ✔Correct Answer-a malignant tumor, which forms in the skin and outside of internal
organs
carnivore ✔Correct Answer-an organism that eats meat, which includes animals, fungi, and plants
ceilometer ✔Correct Answer-an instrument that measure cloud height
cell ✔Correct Answer-a fundamental unit of all light. The cell consists of an outer plasma
membrane, the cytoplasm, and genetic material (DNA).
celsius ✔Correct Answer-a temperature scale which freezes at 0 degrees and boils at 100 degrees
, chemotherapy ✔Correct Answer-a cancer treatment that includes chemicals toxic to malignant
cells
chinook wind ✔Correct Answer-a warm, dry wind on the eastern side of the Rocky Mountains
chlorophyll ✔Correct Answer-the green substance that absorbs light during photosynthesis
chromosome ✔Correct Answer-a single DNA molecule, a tightly coiled strand of DNA, condensed
into a compact structure
clone ✔Correct Answer-an identical copy of an organism
cloud ✔Correct Answer-a visible group of water or ice particles in the atmosphere
commensalism ✔Correct Answer-a relationship between dissimilar organism that is advantageous
to one end doesn't affect the other
continental divide ✔Correct Answer-in the United states, the part of the western mountains that
separates water flowing toward opposite sides of the country
convection ✔Correct Answer-the movement up in the atmosphere of heated moisture.
Thunderstorms are often caused by convection.
core ✔Correct Answer-the portion of the Earth from beneath the mantle of the Earth's center
cross-pollination ✔Correct Answer-fertilization of one plant by pollen from a different plant species
diabetes ✔Correct Answer-a disease related to lowered levels of insulin
diploid cell ✔Correct Answer-a cell with two copies of each chromosome
DNA (deoxyribonucleic acid) ✔Correct Answer-this primary component of chromosomes carries an
organism's genetic code
double helix ✔Correct Answer-a term used to describe the coiling strands of DNA molecule that
resembles a spiral staircase
ecology ✔Correct Answer-the study of interactions of organisms with their environment and with
each other
El Nino ✔Correct Answer-warming of Pacific Ocean seawater along to coast of South America that
leads to significant weather changes in the United States
embryo ✔Correct Answer-the stage of cellular division that develops from a zygote
enzyme ✔Correct Answer-a protein that aids biochemical reactions
epicenter ✔Correct Answer-the part on the surface of the Earth immediately above the focus of an
earthquake
estuary ✔Correct Answer-a place where freshwater and seawater mix