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43 Cards in this Set

  • Front
  • Back
amount of matter in one unit of volume
density
anything that takes up space and has weight
matter
substances that are composed of more than one type of atom bonded together
compounds
substance composed of only one atom
element
tiny group of two or more atoms that are bonded tightly together
molecule
Herschel discovered
Uranus
best known for its rings
Saturn
Jupiter's largest moon
Ganymede
the morning star
Venus
speediest planet
Mercury
measure of the pull of gravity
weight
amount of matter that makes up an object
mass
metric unit used to measure mass
gram
tiny particles that all matter is composed of
atoms
given name to the number of protons in an element
atomic number
positive particles found in the nucleus
protons
negative particle in an atom
electrons
lacking an electrical charge
neutral
chemical reaction that occurs when a substance reacts rapidly with oxygen
combustion
first man on the moon
Armstrong
first man to see colors in white light
Newton
first man to travel in space
Gagarin
first American to orbit earth
Glenn
fothe of modern rocketry
Goddard
single rise or depression in a wave
pulse
bending of any wave direction at the boundary between two wave nedia
refraction
orbit that allows a satellite to remain in the same spot
geostationary
back and forth motion that follows the same pattern
oscillation
length of one complete wave or cycle of oscillation
wavelength
large clouds of gas and dust floating in space
nebulae
hot center of the sun
core
brightest star in the night sky
Sirius
star system containing millions to billions of stars
galaxy
hottest region of the sun's atmosphere
corona
north star
Polaris
a scientist who studies the structure of the earth
geologist
trembling or shaking of the earth
earthquake
magma that has reached the earth's surface
lava
rock formed by sand and minerals pressed together
sedimentary
rock changed by heat or pressure
metamorphic
arranging animals or other things into groups according to similarities
classification
have 3 distict body regions
insects
grow back lost body parts
regeneration