CK-12 Foundation
Ck 12: Life Science: Reproductive System Health
[Free Registration/Login may be required to access all resource tools.] Along with shin guards, a protective cup is useful in preventing injuries. Wearing a protective cup also prevents a potentially serious injury to the testes. Learn...
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Ck 12: Earth Science: Direction on the Earth
[Free Registration/Login may be required to access all resource tools.] Using latitude and longitude to find a location.
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Ck 12: Earth Science: Scientific Models
[Free Registration/Login may be required to access all resource tools.] Recognize the uses, limitations, and different types of scientific models.
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Ck 12: Earth Science: Scales That Represent Earthquake Magnitude
[Free Registration/Login may be required to access all resource tools.] Covers the scales scientists use to measure the size and intensity of earthquakes.
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Ck 12: Physical Science: Half Life and Radioactive Dating
[Free Registration/Login may be required to access all resource tools.] Explains radioactive dating, how it works, and how carbon-14 is used to date the remains of living things.
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Ck 12: Physical Science: Thermal Conductors and Insulators
[Free Registration/Login may be required to access all resource tools.] Thermal conductors and insulators and the ways they are used.
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Ck 12: Physical Science: Ionic Compounds
[Free Registration/Login may be required to access all resource tools.] Ionic compounds: how they form, how the are named, and their properties and uses.
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Ck 12: Life Science: Amphibians
[Free Registration/Login may be required to access all resource tools.] Amphibians are a group of vertebrates that have adapted to live in both water and on land. Amphibian larvae are born and live in water, and they breathe using gills....
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Ck 12: Life Science: Biotechnology in Agriculture
[Free Registration/Login may be required to access all resource tools.] The majority of the corn in the United States is genetically engineered. Corn syrup is used to sweeten many things, like Coke. Corn is also fed to the cows. Learn...
CK-12 Foundation
Ck 12: Life Science: Plant Like Protists
[Free Registration/Login may be required to access all resource tools.] Plant-like protists are known as algae. They are a large and diverse group. Plant-like protists are autotrophs. This means that they produce their own food. They...
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Ck 12: Life Science: Types of Nutrients
[Free Registration/Login may be required to access all resource tools.] Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your...
CK-12 Foundation
Ck 12: Physical Science: Gamma Rays
[Free Registration/Login may be required to access all resource tools.] Explores what gamma rays are and their sources, and the dangers and uses of gamma rays.
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Ck 12: Physical Science: P H Concept
[Free Registration/Login may be required to access all resource tools.] Definition of pH and the strength of acids and bases. How to use the pH scale and why pH is important to living things.
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Ck 12: Physical Science: Solenoid
[Free Registration/Login may be required to access all resource tools.] What a solenoid is and how to change the strength of its magnetic field, and some uses of solenoids.
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Ck 12: Life Science: Fish
[Free Registration/Login may be required to access all resource tools.] What exactly is a fish? You probably think the answer is obvious. You may say that a fish is an animal that swims in the ocean or a lake, using fins. But not all...
CK-12 Foundation
Ck 12: Physical Science: Properties of Acids
[Free Registration/Login may be required to access all resource tools.] What an acid is and its properties and uses. How to detect and measure the strength of acids.
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Ck 12: Physical Science: Properties of Bases
[Free Registration/Login may be required to access all resource tools.] What a base is and its properties and uses. How to detect and measure the strength of bases.
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Ck 12: Physical Science: X Rays
[Free Registration/Login may be required to access all resource tools.] X-rays and their uses, xrays as high-energy rays and their dangers.
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Ck 12: Physical Science: Distance
[Free Registration/Login may be required to access all resource tools.] Explains what distance is, its SI unit, and how to use maps to measure distance.
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Ck 12: Physical Science: Velocity
[Free Registration/Login may be required to access all resource tools.] Difference between velocity and speed, using vector arrows to represent velocity, objects that have different velocities and how to calculate average velocity.
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Ck 12: Physical Science: Scientific Modeling
[Free Registration/Login may be required to access all resource tools.] Using models in science and examples of models in physical science.
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Ck 12: Physical Science: Ultrasound
[Free Registration/Login may be required to access all resource tools.] What ultrasound and echolocation are, and how sonar and ultrasonography are used.
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Ck 12: Life Science: Insect Food
[Free Registration/Login may be required to access all resource tools.] Insects have different types of appendages adapted for capturing and feeding on prey. They also have special senses that help them detect prey. Furthermore, insects...
CK-12 Foundation
Ck 12: Physical Science: Hearing Loss
[Free Registration/Login may be required to access all resource tools.] Explores what deafness is, how loud sounds cause hearing loss, and how to prevent hearing loss using hearing protectors.