Dinosaurs
fossil
extinct
Triassic
Jurassic
Cretaceous
Mesozoic
habitat
bones
prehistoric
paleontologist
herbivore
carnivore
omnivore
|
Earth Science
boulder
erosion
weathering
natural resource
sand
pollution
minerals
soil
water
litter
refuge |
Physical Science
matter
liquid
solid
gas
mass
property
motion
force
gravity
heat
friction
attract
repel
poles
loudness
vibrate
pitch |