6th grade Scientific Investigations

True or False: Experiments are just one way to do scientific investigations, but there are other ways to investigate and gather empirical evidence.

A teacher asked, "How many drops of water will fit on a penny?" Select the two best 6th-grade hypotheses from the list below. Focus on the wording, not whether you agree with the predictions.

A student is curious about what lemon juice will do to a piece of chalk. Here's his hypothesis: If a stick of chalk soaks in lemon juice overnight, then the chalk stick will get smaller. He uses two chalk sticks, but only puts one in the lemon juice so he can see the differences side-by-side. Sort the details below into the variable categories shown.