Unit 1D, Earth's Land and Water Topic: Rocks Franklin Institute Rock Hounds: Rock Hound Collection Safety http://www.fi.edu/fellows/payton/rocks/safety/index.html Find out how to gather rocks safely. Franklin Institute Rock Hounds: Rock Layers Jigsaw Puzzle http://www.fi.edu/fellows/payton/rocks/puzzles/layers/layer1.htm Put the puzzle pieces together. Franklin Institute Rock Hounds: Digging for Words http://www.fi.edu/fellows/payton/rocks/puzzles/seek/seek1.htm Dig for words about rocks.