Saturday, April 27, 2013

Design a Rock

This experiment is from National Geographic Kids' book Jump Into Science: Rocks and Minerals by Steve Tomecek! Kids create their very own sedimentary rock!

plastic cup (book says 7oz)
1/2 cup sand
1/2 cup small pebbles

1. cover bottom of cup with sand
2. pour glue on top (so all sand is covered)
3. drop pebbles in a layer on top of glue
4. add glue (cover pebbles)
5. pour second layer of sand
6. another layer of glue
("cup should be half full")
7. let dry for a week or until glue is hard
8. peel cup away (cut with scissors)
("if some glue is still wet, wipe with damp paper towel")

1 comment:

  1. I just made these with my kiddos, but our pebbles might not have been small enough :( The layers are def not as defined as they are in the picture- so we will see what happens in a week :)