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In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.
- Subjects:
- Health Sciences, Rehabilitation Science, and Biology
- Keywords:
- Muscle cells Muscle contraction
- Resource Type:
- Others
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Others
In this animated and interactive object, learners examine ventilation, external and internal respiration, and gas transport.
- Subjects:
- Health Sciences and Human biology
- Keywords:
- Pulmonary gas exchange Respiratory organs
- Resource Type:
- Others
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Others
In this animated object, learners are introduced to the structure and function of animal cell organelles.
- Subjects:
- Biology
- Keywords:
- Eukaryotic cells Cytology
- Resource Type:
- Others
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Others
In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.
- Subjects:
- Biology
- Keywords:
- Cell membranes
- Resource Type:
- Others
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Others
In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.
- Subjects:
- Medical Laboratory Science and Biology
- Keywords:
- Cells
- Resource Type:
- Others
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Others
In this animated activity, learners examine the two major phases of cell division: mitosis and cytokinesis.
- Subjects:
- Medical Laboratory Science and Biology
- Keywords:
- Cytokinesis Mitosis Cell division
- Resource Type:
- Others
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Others
In this interactive object, learners select the correct description of a child in the five stages of development in the following categories: pattern of growth, vital signs, organ development, vision and hearing, and developmental stage.
- Subjects:
- Health Sciences and Human Biology
- Keywords:
- Child development
- Resource Type:
- Others
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Others
In this interactive object, learners examine the structure and function of the sense of taste.
- Subjects:
- Health Sciences and Human Biology
- Keywords:
- Taste
- Resource Type:
- Others
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Others
In this animated and interactive object, learners examine ABO blood antigens and Rh antigens and their compatibility.
- Subjects:
- Health Sciences, Human Biology, and Medical Laboratory Science
- Keywords:
- Bood groups
- Resource Type:
- Others
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Video
Bees have been rapidly and mysteriously disappearing from rural areas, with grave implications for agriculture. But bees seem to flourish in urban environments -- and cities need their help, too. Noah Wilson-Rich suggests that urban beekeeping might play a role in revitalizing both a city and a species.
- Subjects:
- Environmental Sciences and Biology
- Keywords:
- Honeybees
- Resource Type:
- Video
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Video
How do cancer cells grow? How does chemotherapy fight cancer (and cause negative side effects)? The answers lie in cell division. George Zaidan explains how rapid cell division is cancer's "strength" -- and also its weakness.
- Subjects:
- Health Sciences and Biology
- Keywords:
- Cancer cells
- Resource Type:
- Video
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Video
The things we eat and drink on a daily basis can impact our health in big ways. Too many carbohydrates, for instance, can lead to insulin resistance, which is a major contributor to cardiovascular disease and Type 2 Diabetes. But what are carbs, exactly? And what do they do to our bodies? Richard J. Wood explains.
- Subjects:
- Health Sciences and Food Science
- Keywords:
- Carbohydrates Nutrition
- Resource Type:
- Video
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Video
Sue Desmond-Hellmann is using precision public health -- an approach that incorporates big data, consumer monitoring, gene sequencing and other innovative tools -- to solve the world's most difficult medical problems. It's already helped cut HIV transmission from mothers to babies by nearly half in sub-Saharan Africa, and now it's being used to address alarming infant mortality rates all over the world. The goal: to save lives by bringing the right interventions to the right populations at the right time.
- Subjects:
- Health Sciences and Biology
- Keywords:
- Medicial informatics Big data Public health
- Resource Type:
- Video
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Video
Can we make tattoos both beautiful and functional? Nanotechnologist Carson Bruns shares his work creating high-tech tattoos that react to their environment -- like color-changing ink that can tell you when you're getting a sunburn -- and shows exciting ways they can deliver real-time information about our health.
- Subjects:
- Health Technology and Informatics and Biology
- Keywords:
- Tattooing -- Health aspects
- Resource Type:
- Video
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Video
"For all that's ever been said about climate change, we haven't heard nearly enough about the psychological impacts of living in a warming world," says science writer Britt Wray. In this quick talk, she explores how climate change is threatening our well-being -- mental, social and spiritual -- and offers a starting point for what we can do about it.
- Subjects:
- Health Sciences and Environmental Sciences
- Keywords:
- Climatic changes -- Social aspects Mental health
- Resource Type:
- Video
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Video
Your lifelong health may have been decided the day you were born, says microbiome researcher Henna-Maria Uusitupa. In this fascinating talk, she shows how the gut microbes you acquire during birth and as an infant impact your health into adulthood -- and discusses new microbiome research that could help tackle problems like obesity and diabetes.
- Subjects:
- Health Sciences and Biology
- Keywords:
- Microorganisms Medical genetics
- Resource Type:
- Video
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Video
The fruits and vegetables we buy from the grocery story have been bred to grow bigger and faster — but at the cost of flavor and nutrition, says John C. Trimble, co-founder of Foodscaping Utah. Instead of wasting precious water to maintain the grass in our yards, he suggests we "foodscape" them instead. Not only will our produce taste better, but they'll be grown as locally as possible.
- Subjects:
- Food Science
- Keywords:
- Vegetable gardening Horticulture
- Resource Type:
- Video
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Video
What if we could use biology to restore our balance with nature without giving up modern creature comforts? Advocating for a new kind of environmentalism, scientist and entrepreneur Emily Leproust rethinks modern sustainability at the molecular level, using synthetic biology to create green alternatives. From lab-developed insulin and disease-resistant bananas to airplanes made of super-strong spider silk, she explains how reading and writing DNA can lead to groundbreaking innovations in health, food and materials.
- Subjects:
- Biology
- Keywords:
- Biotechnology Bioengineering
- Resource Type:
- Video
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Video
Easy access to nutrients has contributed to the increase in obesity in the human population. But, what is obesity and why isn’t everybody fat? Dr. Stephen O’Rahilly provides a biomedical perspective of obesity, and evaluates which genes could potentially shift the balance towards obesity. As he explains, one becomes obese when the balance between energy intake and energy spent is shifted. Surprisingly, mutations that lead to obesity in humans aren’t in genes involved in metabolism and energy storage, but failure in satiety signals in the brain that result in people eating too much. The excess of energy intake over energy expenditure leads to obesity. What is the consequence of obesity in human health? Physically, obesity can result in lower mobility and sleeping disorders. But, in humans, the link between obesity and metabolic diseases isn’t straightforward. For example, not everyone that’s obese becomes insulin resistant. As O’Rahilly explains, the probability of an obese individual to have a metabolic disease is linked to the capacity of adipose tissue to store the extra fat. Mutations that decrease fat storage in adipose tissue increase the chance of metabolic diseases, like insulin resistance, even when the person is not obese.
- Subjects:
- Health Sciences and Biology
- Keywords:
- Obesity -- Genetic aspects
- Resource Type:
- Video
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Video
How does your genetic inheritance, culture and history influence your health? Biological anthropologist Lara Durgavich discusses the field of evolutionary medicine as a gateway to understanding the quirks of human biology -- including why a genetic mutation can sometimes have beneficial effects -- and emphasizes how unraveling your own evolutionary past could glean insights into your current and future health.
- Subjects:
- Health Sciences, Public Health, and Human Biology
- Keywords:
- Human genetics Health
- Resource Type:
- Video
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Others
In this interactive object, learners examine how to properly dilute hydrochloric acid.
- Subjects:
- Chemistry
- Keywords:
- Hydrochloric acid
- Resource Type:
- Others
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Others
Learners calculate gas density from the standard molar volume and observe how the density increases with the increasing molecular weight of the gas.
- Subjects:
- Chemistry
- Keywords:
- Natural gas -- Measurement
- Resource Type:
- Others
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Others
In this brief object, learners examine the direct relationship between the volume of a gas sample and the number of moles of gas. A problem is presented so students can test their knowledge of Avogadro's Law.
- Subjects:
- Chemistry
- Keywords:
- Natural gas -- Measurement
- Resource Type:
- Others
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Others
In this animated object, learners view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Hydrogen-ion concentration
- Resource Type:
- Others
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Others
Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Solubility
- Resource Type:
- Others
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Others
Students solve a molarity problem in a drag and drop exercise.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Solution (Chemistry)
- Resource Type:
- Others
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Others
In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.
- Subjects:
- Chemistry
- Keywords:
- Kinetic theory of gases Gas dynamics
- Resource Type:
- Others
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Others
Learners complete an exercise to match chemical formulas with the names of binary compounds, tertiary compounds, and ions.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.
- Subjects:
- Chemistry
- Keywords:
- Boyle's law Charles' law Gas laws (Physical chemistry)
- Resource Type:
- Others
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Others
In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."
- Subjects:
- Chemistry
- Keywords:
- Hydrogen bonding
- Resource Type:
- Others
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Others
In this interactive object, learners use the ideal gas law to solve a practice problem.
- Subjects:
- Chemistry
- Keywords:
- Gas laws (Physical chemistry)
- Resource Type:
- Others
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Video
Learners apply the principles associated with Boyle’s Law.
- Subjects:
- Chemistry
- Keywords:
- Boyle's law Gas laws (Physical chemistry)
- Resource Type:
- Video
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Others
In this interactive object, the learner practices identifying charges on ions.
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Others
Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
Learners observe that the volume of one mole of any gas is 22.4 L at standard temperature and pressure. An illustration shows that only the mass of the molar volume differs with the identity of the gas.
- Subjects:
- Chemistry
- Keywords:
- Gases Molecular volume
- Resource Type:
- Others
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Others
Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Hydrogen-ion concentration
- Resource Type:
- Others
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Others
Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Volume (Cubic content) Weights measures
- Resource Type:
- Others
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Others
Students identify the parts of a triple beam balance and practice measuring the mass of objects.
- Subjects:
- Chemistry
- Keywords:
- Weights measures Balances (Weighing instruments)
- Resource Type:
- Others
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Others
Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.
- Subjects:
- Chemistry
- Keywords:
- Molecular weights Chemistry Physical theoretical
- Resource Type:
- Others
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Video
Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.
- Subjects:
- Chemistry
- Keywords:
- Chemistry -- Mathematics
- Resource Type:
- Video
-
Video
In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.
- Subjects:
- Chemistry
- Keywords:
- Electromagnetic waves
- Resource Type:
- Video
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Others
In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.
- Subjects:
- Chemistry
- Keywords:
- Solid state chemistry
- Resource Type:
- Others
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Others
Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).
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Video
Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.
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Others
Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.
- Subjects:
- Chemistry
- Keywords:
- Melting points Freezing points
- Resource Type:
- Others
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Others
Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
In this animated object, students examine the role that the solubility of water plays in various biological functions.
- Subjects:
- Chemistry
- Keywords:
- Water chemistry
- Resource Type:
- Others
-
Video
In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements
- Resource Type:
- Video
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Others
Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.
- Subjects:
- Chemistry
- Keywords:
- Temperature Low temperatures
- Resource Type:
- Others
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Video
Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions
- Resource Type:
- Video