6th Grade Science Test 11 Flashcards
a tiny group of two or more atoms that are bonded tightly together
molecule
a substance composed of only one atom
element
substances that are composed of more than one type of atom bonded together
compounds
anything that takes up space and has mass
matter
the amount of matter in one unit of volume
density
the speediest planet
mercury
often called the morning star
Venus
the planet whose largest moon is Ganymede
Jupiter
best known for its rings
Saturn
discovered by the Herschels
Uranus
a measure of the pull of gravity on an object
weight
the amount of matter that makes up an object
mass
the metric unit used to measure an object’s mass
gram
the tiny particles that all matter is composed of
atoms
the name given to the number of protons in an element
atomic number
positive particles found in the nucleus
protons
negative particles found in an atom
electrons
lacking an electrical charge
netural
formed by electrons that are in orbit at about the same distance from the nucleus
shell
the chemical reaction that occurs when a substance reacts rapidly with oxygen
combustion