9th Grade Sciene

missdavila's version from 2016-06-30 07:22


Question Answer
AsteriodsA small rock body orbiting the sun.
AtmosphereThe envelope of gases surrounding the earth or another planet.
ConvectionThe movement caused within a fluid by the tendency of hotter and therefore less dense material to rise.
DensityThe degree of compactness of a substance.
EnergyThe strength and vitality required for sustained physical or mental activity.
HeliumThe chemical element of atomic number 2, an inert gas that is the lightest member of the noble gas series.
HydrogenAcolorless, odorless, highly flammable gas, the chemical element of atomic number 1.
Gravitational ForcesThe force of attraction between all masses in the universe, the more remote the body the less the gravity.
LithosphereThe rigid outer part of the earth, consisting of the crust and upper mantle.
MetamorphismAlteration of the composition of structure of a rock by heat, pressure, or other natural agency.