Science is always changing. Its very nature requires that scientists constantly revise theories to make sense of new observations. As they learn science, students are also constantly revising how they make sense of their observations, which requires comparisons with what they already know to process new information. A teacher can take advantage of…

Describes an activity that demonstrates among the following: diffusion; cohesion and adhesion; properties of surface tension which include wicking, hydrophilic, and hydrophobic molecular behaviors; and break up of fat clusters by liquid dishwashing detergent. (DDR)

Presents an activity in which models help students visualize both the DNA process and transcription. After constructing DNA, RNA messenger, and RNA transfer molecules; students model cells, protein synthesis, codons, and RNA movement. (MDH)