General Science Terms Flashcards
allotrope
a substance created when an element combines with itself to become a compound. O3 is(ozone)
alloy
A metal, that unlike iron, gold, silver, or aluminum, is a mixture composed of metal elements. Examples: Brass, Bronze, Pewter,, and Steel (iron, nickle, and titanium).
amber
petrified sap: many early fossils have been found preserved in amber.
ambergris
a waxy substance found floating in or on the shores of tropical waters. originates in the intestines of the sperm whale.
annual
a plant that grows over only one season: inpatients, zinnias, and sunflowers.
apiary
a place where bees are kept.
arthropod
a huge animal phylum that includes insects, crustaceans, and arachnids.
avian
of or relating to birds.
bryophyta
the category of plants that includes all mosses.
Cambrian Period
Part of the Paleozoic Era, the period that began when the oldest easily identifiable fossils first appeared.
carnivourous
describing an animal whose principal diet is meat based
Cenozoic Era
Meaning “recent life” when mammals and flowering plants began to flourish.
class
a major subdivision of phyla into which organisms are classified. Examples Chordata (vertebrates), mammalia (mammals), ave (birds)
compound
any mixture of elements, such as H2O
coniferous
describing cone-bearing trees, such as pines, spruce, and yews, that usually don’t loose their leaves in the winter and usually have pines as leaves.
Cretaceous Period
Part of the Mesozoic Era, the time during which dinosaurs peaked and then died our and mammals and flowering plants first appeared.
deciduous
describing trees that lose their leaves in the winter, such as maple, oak, and sycamore.
eon
great span of time defined by major events
epoch
division of geologic time that includes two or more periods grouped together.
era
unit of geologic time less than a period and greater than an age.
eukaryote
an organism composed of one or more cells containing visibly evident nuclei and organelles. Includes all plants and animals.
eutheria
also known as “placental.” the subclass of mammals that includes most mammals, which bear young live and nourish the fetus with a placenta. This subclass includes dogs, people, bats, and even whales.