Students are able to prepare and use pH indicators in paper form. They find out the color of the indicator paper plus test solution may change with time. Students use red cabbage to use for the indicator.

Students observe and classify objects that float or sink.

Third graders discuss what they think the word "observation" means and discover different ways that we observe. They observe as the teacher demonstrates how to use a hand lens as a tool for observing tiny details. They then use hand...