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Ck 12: Life Science: Helpful Bacteria
[Free Registration/Login may be required to access all resource tools.] Can we survive without bacteria? Could bacteria survive without us? Learn more about helpful bacteria in this learning module produced by CK-12.
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Ck 12: Earth Science: Non Renewable Energy Resources
[Free Registration/Login may be required to access all resource tools.] What nonrenewable energy resources and fossil fuels are and how they form, and the drawbacks of using nonrenewable energy resources.
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Ck 12: Earth Science: Energy Conservation
[Free Registration/Login may be required to access all resource tools.] Overview of how energy is used, and how it can be conserved.
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Ck 12: Life Science: Importance of Seedless Plants
[Free Registration/Login may be required to access all resource tools.] Seedless plants have been tremendously useful to humans. Without these plants evolving millions of years ago, life as we know it would be very different. Learn more...
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Ck 12: Life Science: Importance of Protists
[Free Registration/Login may be required to access all resource tools.] Humans could not live on Earth if it were not for protists. Why? Protists produce almost one-half of the oxygen on the planet, decompose and recycle nutrients that...
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Ck 12: Life Science: Scientific Investigation
[Free Registration/Login may be required to access all resource tools.] The scientific method is a process used to investigate the unknown. It is the general process of a scientific investigation. This process uses evidence and testing....
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Ck 12: Life Science: Importance of Mollusks
[Free Registration/Login may be required to access all resource tools.] Mollusks are important in a variety of ways; they are used as food, for decoration, in jewelry, and in scientific studies. They are even used as roadbed material and...
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Ck 12: Physical Science: Nuclear Fission
[Free Registration/Login may be required to access all resource tools.] What happens during nuclear fission and what a nuclear chain reaction is. How nuclear fission can be used to produce energy and the pros and cons of using that energy.
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Ck 12: Earth Science: Observations and Experiments
[Free Registration/Login may be required to access all resource tools.] Using observations and scientific experiments to test hypotheses.
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Ck 12: Earth Science: Radiometric Dating
[Free Registration/Login may be required to access all resource tools.] How scientists can use radioactive decay to find the age of certain materials.
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Ck 12: Earth Science: Topographic and Geologic Maps
[Free Registration/Login may be required to access all resource tools.] How to use topographic and geologic maps.
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Ck 12: Earth Science: Collecting Weather Data
[Free Registration/Login may be required to access all resource tools.] Describes the various instruments that scientists use to collect weather data.
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Ck 12: Earth Science: Energy Conservation
[Free Registration/Login may be required to access all resource tools.] Overview of how energy is used, and how it can be conserved.
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Ck 12: Earth Science: Map Projections
[Free Registration/Login may be required to access all resource tools.] How to use topographic, bathymetric, and geologic maps.
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Ck 12: Earth Science: Measuring Earthquake Magnitude
[Free Registration/Login may be required to access all resource tools.] Covers the instruments scientists use to measure earthquake magnitude.
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Ck 12: Life Science: Cellular Respiration
[Free Registration/Login may be required to access all resource tools.] How does the food you eat provide energy? Through the process of cellular respiration, the energy in food is changed into energy that can be used by the body's...
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Ck 12: Life Science: Fungi Classification
[Free Registration/Login may be required to access all resource tools.] Scientists used to think that fungi were members of the plant kingdom. They thought this because fungi had several similarities to plants. However, there are a...
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Ck 12: Life Science: Types of Echinoderms
[Free Registration/Login may be required to access all resource tools.] Birds aren't the only creatures that have feathers. One type of echinoderm, the feather star, has feathery arms. These animals don't fly or even move much at all....
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Ck 12: Physical Science: Air Pressure and Altitude
[Free Registration/Login may be required to access all resource tools.] Atmospheric pressure and how it changes with increasing altitude, and how air pressure is used.
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Ck 12: Physical Science: Balancing Chemical Equations
[Free Registration/Login may be required to access all resource tools.] How to balance a chemical equation and using coefficients.
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Ck 12: Earth Science: Principle of Uniformitarianism
[Free Registration/Login may be required to access all resource tools.] How to use information from the present to understand the past.
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Ck 12: Life Science: Cardiovascular Diseases
[Free Registration/Login may be required to access all resource tools.] A cardiovascular disease (CVD) is any disease that affects the cardiovascular system. But the term is usually used to describe diseases that are linked to...
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Ck 12: Physical Science: Electromagnetism
[Free Registration/Login may be required to access all resource tools.] Defines what electromagnetism is and its uses, and the right hand rule.
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Ck 12: Life Science: Effects of Water Pollution
[Free Registration/Login may be required to access all resource tools.] Water pollutants can have an effect on both the ecology of ecosystems and on humans. As a result of water pollution, humans may not be able to use a waterway for...