New ReviewViewers of a short video learn about salt and water molecules and how their characteristics determine how they interact with each other. Then, they watch a simulation of how the interaction limits the uptake of water in plant roots and...

New ReviewA short video teaches viewers about the Olsen Test, a soil test specific for plants grown in arid regions. The soil in arid regions has a higher pH and plants require special treatment to thrive. The video provides information about the...

New ReviewHow do the different types of soil allow water to flow? Scholars compare flocculated and dispersed soils and their ability to move water through the soil. Silt, sand, and clay particles clump together and create large pores in the soil...

New ReviewWhat important aspects of gene therapy should patients understand? Part four of the six-part Gene Therapy: Molecular Bandage? module challenges scholars to create brochures or posters to explain gene therapy and its process, challenges,...

New ReviewWhy are neon signs so bright and colorful? Scholars discover how artists create neon signs and find out that neon is not the only gas they use in their production. Next, they explore the history of neon signs and how their development...

New ReviewWhat are space dust bunnies and why are they important to us? Pupils explore space dust bunnies and how these particles helped form the planets. To understand the phenomenon, class members investigate the chemistry behind dust particles...

New ReviewAP® free-response questions are often challenging for scholars. Give them practice writing free-response questions using former questions from the AP® Biology exam on topics such as genetic mutations, cellular respiration, evolution, and...

New ReviewHow does biodiversity affect ecosystems? An insightful presentation covers the concept of biodiversity and its importance. It takes a look at extinction and endangered and threatened species as well as biodiversity hot spots around the...

New ReviewWhat chemical properties depend on the concentration of a solution? Learners examine colligative properties before taking a look at freezing point depression and boiling point elevation and how it applies to real-world scenarios. They...

New ReviewWhat is the difference between an acid and a base? To understand the chemical definition of acid and base, they learn about their chemical and physical properties. They identify what common compounds are acidic and basic, and determine...

New ReviewWhy is water so important to the world around us? Scholars learn about the different types of water sources and how water is used. They also identify ways to conserve and manage water as well as discover the different types and causes of...

New ReviewHow do little scientists know when a liquid will turn into a gas? Scholars explore how heating curves and phase diagrams provide useful information about the states of matter. They learn about the role of kinetic and potential energy in...

New ReviewHow do liquids change into solids? Learners differentiate between endothermic and exothermic changes and see how those relate to changes within states of matter. In addition, individuals take a look at vapor pressure, boiling and melting...

New ReviewWhy is pH important? Scholars learn about the pH scale in two of two acid/base presentations. They identify how ionization of water relates to the pH of acids and bases and look at examples on a pH scale of strong and weak acids and...

New ReviewHow do populations grow and change? Scholars define demographics and identify trends in human population growth and learn how to make predictions about population size based on data analysis. Learners then explore the concepts of age...

New ReviewCan humans be infected by animal viruses? Pupils explore the phenomenon of viral evolution and learn about how animal viruses sometimes adapt to infect humans. They see how viruses are transmitted and what pathogens need to survive. The...

New ReviewHow do turtle shells form? Scholars explore the evolution of turtle shells and learn about how they form from many different bones before relating the process to cell differentiation in an organism. Pupils also look at different turtle...

New ReviewHow does temperature and pressure affect the behavior of gases? Scholars learn about the three gas laws in the second of five gas presentations from the Chemistry PowerPoints series. They explore Boyle's Law, Charles' Law, and...

New ReviewWhat's the best way to find the mass of a compound in a chemical equation? Learners explore the concept of stoichiometry as part of the Chemistry PowerPoints series. After exploring a real-life example, scholars learn how to apply the...

New ReviewWhat is a mole? Introduce learners to the concept of the mole with a presentation that is a part of the Chemistry PowerPoints series. Scholars discuss examples of how the mole is used in real-life applications. Then, they identify how it...

New ReviewThe name of a chemical compound provides a lot of critical information. Learners explore the different naming conventions for naming ionic and covalent compounds as a part of the Chemistry PowerPoints series. They practice with a variety...

New ReviewHow long does it take for an atom to decay? Scholars learn about radioactive decay and half-lives as part of the Chemistry PowerPoints series. They develop an understanding of the roles of electrons and neutrons in the different types of...

New ReviewWhy do atoms break down? Scholars learn about radioactive decay as part of the larger Chemistry PowerPoints series. They differentiate between fission and fusion and alpha or beta particles, as well as gamma rays. Diagrams show how atoms...

New ReviewHow does ionizing radiation affect living cells? Learners explore the types of radiation using diagrams in a presentation that is part of the Chemistry PowerPoints series. They learn how alpha particles, beta particles, and gamma rays...