CK-12 Foundation
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.
CK-12 Foundation
Ck 12: Life Science: Transcription of Dna to Rna
[Free Registration/Login may be required to access all resource tools.] DNA is located in the nucleus. Proteins are made on ribosomes in the cytoplasm. Remember that information in a gene is converted into mRNA, which carries the...
CK-12 Foundation
Ck 12: Physical Science: Hydrocarbons
[Free Registration/Login may be required to access all resource tools.] Discusses the two different classes of hydrocarbons and their properties, uses and sources.
CK-12 Foundation
Ck 12: Life Science: Hardy Weinberg Theorem
[Free Registration/Login may be required to access all resource tools.] Sometimes understanding how common a gene is within a population is necessary. Or, more specifically, you may want to know how common a certain form of that gene is...
CK-12 Foundation
Ck 12: Life Science: Preserving Water Sources
[Free Registration/Login may be required to access all resource tools.] It might seem like there is plenty of water on Earth, but that's not really the case. Water is a limited resource. That means that it is used faster than it is...
CK-12 Foundation
Ck 12: Earth Science: Elevation on the Earth
[Free Registration/Login may be required to access all resource tools.] Using latitude and longitude to find a location.
CK-12 Foundation
Ck 12: Life Science: Recombinant Dna
[Free Registration/Login may be required to access all resource tools.] Recombinant DNA is the combination of DNA from two different sources. For example, it is possible to place a human gene into bacterial DNA. Recombinant DNA...
CK-12 Foundation
Ck 12: Life Science: Vision Correction
[Free Registration/Login may be required to access all resource tools.] You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the...
CK-12 Foundation
Ck 12: Earth Science: Solar Power
[Free Registration/Login may be required to access all resource tools.] How solar energy can be collected and used, and the consequences of it.
CK-12 Foundation
Ck 12: Life Science: Harmful Bacteria
[Free Registration/Login may be required to access all resource tools.] With so many species of bacteria, some are bound to be harmful. Harmful bacteria can make you sick. They can also ruin food and be used to hurt people. Learn more...
CK-12 Foundation
Ck 12: Algebra: Scientific Notation
[Free Registration/Login may be required to access all resource tools.] Scientific notation, why it is used, and converting numbers to and from scientific notation.
CK-12 Foundation
Ck 12: Physical Science: Electric Safety
[Free Registration/Login may be required to access all resource tools.] Overview of electric safety: short circuits, electric safety features, and how to use electricity safely.
CK-12 Foundation
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.
CK-12 Foundation
Ck 12: Life Science: Microscopes
[Free Registration/Login may be required to access all resource tools.] A microscope is a tool used to make things that are too small to be seen by the human eye look bigger. Before microscopes were invented in 1595, the smallest things...
CK-12 Foundation
Ck 12: Life Science: Cell Division
[Free Registration/Login may be required to access all resource tools.] Cells do eventually wear out. At that point, they need to be replaced. This is one reason that your cells divide. New cells that result after cells divide are also...
CK-12 Foundation
Ck 12: Physical Science: Vision Problems and Corrective Lenses
[Free Registration/Login may be required to access all resource tools.] Vision problems and how lenses can be used to correct them.
CK-12 Foundation
Ck 12: Physical Science: Scientific Measuring Devices
[Free Registration/Login may be required to access all resource tools.] How to use scientific measuring devices (metric ruler, triple beam balance, graduated cylinder).
CK-12 Foundation
Ck 12: Physical Science: Nuclear Fusion
[Free Registration/Login may be required to access all resource tools.] What nuclear fusion is and how and where it occurs. Using nuclear fusion to produce energy and its pros and cons.
CK-12 Foundation
Ck 12: Life Science: Nonrenewable Resources
[Free Registration/Login may be required to access all resource tools.] A nonrenewable resource is a natural resource that is consumed or used up faster than it can be made by nature. Two main types of nonrenewable resources are fossil...
CK-12 Foundation
Ck 12: Earth Science: Location on the Earth
[Free Registration/Login may be required to access all resource tools.] Using latitude and longitude to find a location.
CK-12 Foundation
Ck 12: Physical Science: Elastic Force
[Free Registration/Login may be required to access all resource tools.] Definition of elasticity and elastic force, and examples of the use of elastic force.
CK-12 Foundation
Ck 12: Life Science: Gene Therapy
[Free Registration/Login may be required to access all resource tools.] Gene therapy is the insertion of genes into a person's cells to cure a genetic disorder. Could gene therapy be the cure for AIDS? No, AIDS is caused by a virus. Gene...
CK-12 Foundation
Ck 12: Physical Science: Microwaves
[Free Registration/Login may be required to access all resource tools.] Microwaves and their uses, and how cell phones and radar work.