life earth materials earth's rotation
air animal animals balance behavior
month motion ocean organisms parent
seasonal shape similarities similarity
prehistoric pulling pushing reasoning
tree universe vibration water weather
rock ruler salt science scientist
dinosaur dissolving distance diversity of
pebble plant precipitation prediction
characteristics chart circular cloud
size sky soil solid star states of matter
straight-line motion sun's position sun's
pattern boulder burning change
conditions daily day death differences
size teamwork temperature thermometer
insect light liquid machine magnet
week weight zigzag machine magnet
growth position habitat heat horsetail
energy food freezing gas gravity growth
magnification magnifier mammoth mixture