Martha London

Wedge

Wheel and Axle

Screw

Pulley

Lever

Inclined Plane

Dunes (Earthforms)

Glaciers (Earthforms)

Caves (Earthforms)

Lakes (Earthforms)

Rivers (Earthforms)

Cloudy Weather (What is Weather?)

Cold Weather (What is Weather?)

Snowy Weather (What is Weather?)

Hot Weather (What is Weather?)

Windy Weather (What is Weather?)

Rainy Weather (What is Weather?)

Garter Snake Hibernation (Weather Makes Them Sleep)

Groundhog Hibernation (Weather Makes Them Sleep)

Wood Frog Hibernation (Weather Makes Them Sleep)

Black Bear Hibernation (Weather Makes Them Sleep)

Thomas Jefferson (Influential Presidents)

Abraham Lincoln (Influential Presidents)

Franklin D. Roosevelt (Influential Presidents)