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