Physics Classroom
Motion Diagrams
Scholars work through three activities building motion diagrams as part of a series exploring dimensional kinematics. Each activity has six descriptions requiring application of velocity vectors, acceleration vectors, and challenge...
Physics Classroom
Name That Motion
Pupils apply their understanding of motion to 11 practice problems as part of a series on dimensional kinematics. They view a dot diagram animation and read descriptions to identify which match. As a bonus, the interactive offers...
Physics Classroom
Acceleration
The acceleration rate of a flea jumping works out to 50 times faster than the acceleration rate of the space shuttle. Pupils apply knowledge of acceleration to dot diagrams, velocity-time tables, and word problems. They solve for...
Physics Classroom
Distance vs. Displacement
Home is where your displacement is zero. Scholars practice solving distance versus displacement problems of increasing difficulty. They begin with two stage motion and, by the wizard level, each problem has four stage motion to consider....
Howard Hughes Medical Institute
DNA Sequence Assembly
Oncologists use DNA sequence data to identify specific cancers and offer more targeted treatments. Grasp an understanding of the complexity involved by learning how the body sequences and assembles DNA. Eager scientists explore the...
Howard Hughes Medical Institute
Stopping Mosquito-Borne Disease
Fifty million people catch dengue fever each year. Understanding the transmission and symptoms of this disease helps people prevent and treat it. Learn about multiple intervention strategies and view graphs of their effects to stop the...
Howard Hughes Medical Institute
Bacterial Quorum Sensing
The marine bacteria vibrio harveyi helps with DNA repair in humans. Understanding how to manipulate and genetically mutate this bacteria fascinates researchers. Young scientists observe two different mutations, predict the resulting...
Howard Hughes Medical Institute
Sorting Seashells
Scientists use morphological, physiological, and molecular information to continually revise organism classification. Scholars observe and learn about 20 shells. Then, they work to sort and classify the shells, building a taxonomy based...
Howard Hughes Medical Institute
Neural Control of Walking and Running
Physical therapists state that relearning how to walk often motivates stroke and brain injury patients. Researchers spend a great deal of time focused on understanding the neural control required for walking. They pass along that...
Howard Hughes Medical Institute
Retroviruses and Viral Diversity
Eight percent of DNA comes from retroviruses. Learn what sets retroviruses apart from other types of viruses with an presentation that focuses on the differences between viruses with a DNA genome, an RNA genome, and retroviruses.
Howard Hughes Medical Institute
Stem-Cell-Based Therapies
Currently, stem cell therapies treat more than 80 diseases, and that number grows every year. Individuals learn about some of these therapies and where the stem cells come from. They then focus on the future of stem cell treatments and...
Howard Hughes Medical Institute
Tissue Regeneration in Animals
Every species regenerates at least one tissue or organ in their bodies. Learn about different regeneration processes in animals. An intriguing presentation specifically discusses starfish, hydras, planaria, salamanders, mice, humans,...
Howard Hughes Medical Institute
Genetic Switches
Is it reasonable for us to alter genes in plants to make them more nutritious and better tasting? Is it reasonable for us to alter genes to make babies smarter or better looking? The human genome contains millions of gene switches for...
Howard Hughes Medical Institute
Natural and Artificial Selection
Many people oppose genetically modified foods yet support selective breeding in dogs. Learn about the similarities and differences through a short presentation that features many video clips. It covers natural selection, artificial...
Howard Hughes Medical Institute
How the Body Uses Fat
Not all fat is bad—eating good fats actually helps with weight loss. Learn how the body uses fat through a 27-slide presentation that breaks down the path fat takes from entering to exiting the body. Understanding why fat is helpful and...
Physics Classroom
Trajectory - Angle Launched Projectiles
Horizontal and vertical speeds change as projectiles move through space. As part of a series on vectors and projectiles, scholars create vector diagrams to compare these speeds at various locations. They they determine the values for...