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Curated Video
Understanding Mass Changes in Chemical Reactions
This video discusses mass changes in chemical reactions. The Law of Conservation of Mass is introduced, which states that atoms are not lost or gained during a chemical reaction. Two examples are given: the reaction of sodium with water...
KnowMo
Reverse Percentages: Finding the Original Value After an Increase or Decrease
This video explains the concept of reverse percentages, which involve finding the original value after an increase or decrease has occurred. The instructor demonstrates how to use percentages to calculate the original value, using...
Curated Video
Introduction to Percentages and Percentage Changes in Business
The video explains the importance of percentages in business and provides a step-by-step process for calculating percentage changes. It highlights the various applications of percentages in business, including market share, profit...
Curated Video
Introduction to Oxidation and Reduction and Half Equations
This video explains the concepts of oxidation and reduction in chemistry. The presenter explains the meaning of state symbols and how to identify oxidation and reduction in chemical reactions. The video also covers the topic of half...
Curated Video
Acids and Alkalis: Understanding pH and Indicators
The video discusses acids and alkalis, the pH scale, and indicators. It explains what acids and alkalis are in terms of the ions they form when dissolved in water, and how their concentrations can be measured using the pH scale. The...
Visual Learning Systems
People and Climate Change
This video discusses the impact of human activity on Earth's climate and emphasizes the role of greenhouse gases, particularly carbon dioxide, in causing global warming. This video is part of the 6-part series, Changing Climate.
Curated Video
States of Matter and Energy: Changes, Specific Latent Heat and Calculations
This video explains the relationship between energy and changes of states in matter. It discusses the different changes of state, such as melting, boiling, and condensing, and the fixed temperatures at which they occur. The concept of...
Curated Video
Electrolysis of Aqueous Solutions
This video is a lecture presentation on the topic of electrolysis of aqueous solutions. It starts with a brief refresher on what electrolysis is, and then explains how electrolysis is used to split compounds using electricity. The...
PBS
Pbs Learning Media: Living From the Land and Sea
In this video segment adapted from the Alaska Native Heritage Center, discover the connections between Alaska Native subsistence culture and the natural cycle of the seasons.
PBS
Pbs Learning Media: Studying Antarctic Seals
Learn firsthand from a young Antarctic researcher about a long-term study on the reproductive history of Weddell seals in this video segment adapted from WomenInAntarctica.com. [3:33]
PBS
Pbs Learning Media: Losing Permafrost in Alaska
In this video segment adapted from Spanner Films, learn how Alaska Native communities that rely on hunting and fishing are threatened by rising temperatures and melting permafrost.
PBS
Pbs Learning Media: Dolphin Reproductive Behavior
This video segment from the Science and Technology Chat series focuses on dolphin pregnancy, birth, and care of the young, and features Atlantic bottlenose dolphins living in captivity at the Mirage Resort Dolphin Habitat. [2:38]
PBS
Pbs Learning Media: Warmer Oceans Affect Food Web
In this video adapted from KTOO, scientists discuss how ocean warming may be responsible for the decline in the seabird, seal, and sea lion populations of Prince William Sound, Alaska.
PBS
Pbs Learning Media: Alaska Native Teens Help Researchers
In this video adapted from KUAC-TV and the Geophysical Institute at the University of Alaska, Fairbanks, Alaska Native students contribute to research on how their environment is changing as a result of global warming.
PBS
Pbs Learning Media: Changing Arctic Landscape
In this video [3:54] adapted from the Arctic Athabaskan Council, learn how warmer temperatures in the Arctic are transforming the landscape, triggering a host of effects such as permafrost thawing and insect infestations.
PBS
Pbs Learning Media: Bats of the Southwest
This video segment from the Nevada Department of Wildlife looks at various species of bats and how they impact the environment. [3:14]
PBS
Pbs Learning Media: Steve Mac Lean: Conservationist
In this video profile produced for Teachers' Domain, meet conservationist Steve MacLean, an Inupiaq from Barrow, Alaska, who works to preserve the health of the Bering Sea ecosystem. Site includes short essay, discussion questions,...
Khan Academy
Khan Academy: Ecology: Ecosystems and Ecological Networks
Understand the flow of energy and matter through ecosystems and what happens if an ecosystem is disrupted. [8:56]
Sophia Learning
Sophia: The Study of Matter: Classification, Structure, Properties and Changes
This lesson will introduce chemistry as the science that studies matter: its classification, structure, properties and changes.