Oxygen and carbon dioxide freely cross cell membranes. The simulation demonstrates the diffusion of these across a permeable membrane. To create a great visual for users, it graphs the balance of molecules as it changes throughout the...

One friend explains to another that plants combine water and carbon dioxide with the energy of the sun to produce sugar and oxygen. She mentions the roles of the roots, chloroplasts, and stomata in an engaging video that reviews how...

If most gases are invisible, how do we know so much about them? Pupils practice associating the name, formula, testing method, and outcome for four common gases using an interactive. Users build on the content of their first puzzles to...

In this bonding instructional activity, students take an interactive quiz with 15 multiple choice questions about the VSEPR Theory, bonding, the geometry of molecules, Lewis structures, resonance structures and enthalpy changes.

In this human heart learning exercise, students read a short passage about the human heart and study a diagram. Students then fill in the blanks to complete the 8 questions about the human heart.

In this online interactive photosynthesis learning exercise, students respond to 9 multiple choice and fill in the blank questions regarding the information included in the provided paragraphs.

In this ecosystem exploration worksheet, students complete 2 prior knowledge questions, then use "Forest Ecosystem Gizmo" to conduct several activities, completing short answer questions when finished.

In these climate change worksheets, students read through the fourteen questions about climate change. Students select the correct answer to complete the quiz.