CK-12 Foundation
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...
CK-12 Foundation
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...
CK-12 Foundation
Ck 12: Life Science: Importance of Arthropods
[Free Registration/Login may be required to access all resource tools.] Arthropods might seem a little scary, but they are actually performing important roles in the environment. Arthropods are important to the ecosystem and to humans in...
CK-12 Foundation
Ck 12: Life Science: Indoor Air Pollution
[Free Registration/Login may be required to access all resource tools.] Recall that air pollution is due to chemical substances and particles released into the air mainly by human actions. When most people think of air pollution, they...
CK-12 Foundation
Ck 12: Life Science: Influences on Darwin
[Free Registration/Login may be required to access all resource tools.] When Darwin returned to England at the end of his voyage, he did not rush to announce his discoveries. He did not want to present any ideas unless he had strong...
CK-12 Foundation
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....
CK-12 Foundation
Ck 12: Life Science: Vertebrate Characteristics
[Free Registration/Login may be required to access all resource tools.] Vertebrates are animals with backbones. These include fish, amphibians, reptiles, birds, and mammals. Learn more about vertebrate characteristics in this learning...
CK-12 Foundation
Ck 12: Life Science: Cardiovascular System Health
[Free Registration/Login may be required to access all resource tools.] There are many risk factors that can cause a person to develop cardiovascular disease. A risk factor is anything that is linked to an increased chance of developing...
CK-12 Foundation
Ck 12: Life Science: Cardiovascular System
[Free Registration/Login may be required to access all resource tools.] Your cardiovascular system has many jobs. At times the cardiovascular system can work like a pump, a heating system, or even a postal carrier. To do these tasks,...
CK-12 Foundation
Ck 12: Life Science: Importance of Insects
[Free Registration/Login may be required to access all resource tools.] Many insects are considered to be pests by humans. However, insects are also very important for numerous reasons. Learn more about the importance of insects in this...
CK-12 Foundation
Ck 12: Life Science: Importance of Mammals
[Free Registration/Login may be required to access all resource tools.] Mammals play many important roles in ecosystems, and they also benefit people. Learn more about the importance of mammals in this learning module produced by CK-12.
CK-12 Foundation
Ck 12: Life Science: Infancy and Childhood
[Free Registration/Login may be required to access all resource tools.] The first year after birth is called infancy. Infancy is a period when the baby grows very fast. During infancy, the baby doubles in length and triples in weight....
CK-12 Foundation
Ck 12: Life Science: Inflammatory Response
[Free Registration/Login may be required to access all resource tools.] A scrape is a break in the skin that may let pathogens enter the body. If bacteria enter through the scrape, they could cause an infection. These bacteria would then...
CK-12 Foundation
Ck 12: Life Science: Keeping the Nervous System Healthy
[Free Registration/Login may be required to access all resource tools.] Activities that challenge your brain, such as working on a Sudoku puzzle, are good for the health of your nervous system. Just like you need to work out your body to...
CK-12 Foundation
Ck 12: Life Science: Central Nervous System
[Free Registration/Login may be required to access all resource tools.] The central nervous system (CNS) is the largest part of the nervous system. It includes the brain and the spinal cord. The bony skull protects the brain. The spinal...
CK-12 Foundation
Ck 12: Life Science: Chemistry of Life
[Free Registration/Login may be required to access all resource tools.] Many chemical reactions are going on constantly inside your body. In fact, there are probably thousands of chemical reactions occurring every second in every one of...
CK-12 Foundation
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...
CK-12 Foundation
Ck 12: Life Science: Invertebrates
[Free Registration/Login may be required to access all resource tools.] Animals are also often identified as being either invertebrates or vertebrates. These are terms based on the skeletons of the animals. Vertebrates have a backbone...
CK-12 Foundation
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...
CK-12 Foundation
Ck 12: Life Science: Characteristics of Life
[Free Registration/Login may be required to access all resource tools.] How do you define a living thing? What do mushrooms, daisies, cats, and bacteria have in common? All of these are living things, or organisms. It might seem hard to...
CK-12 Foundation
Ck 12: Life Science: Diseases of the Nervous System
[Free Registration/Login may be required to access all resource tools.] The nervous system controls sensing, feeling, and thinking. It also controls movement and just about every other body function. That's why problems with the nervous...
CK-12 Foundation
Ck 12: Life Science: Health of the Digestive System
[Free Registration/Login may be required to access all resource tools.] Most people have problems with their digestive system once in a while. These could be symptoms of foodborne illness, food allergies, or a food intolerance. Learn...
CK-12 Foundation
Ck 12: Life Science: Injuries of the Nervous System
[Free Registration/Login may be required to access all resource tools.] Injuries to the central nervous system may damage tissues of the brain or spinal cord. If an injury is mild, a person may have a full recovery. If an injury is...
CK-12 Foundation
Ck 12: Life Science: Levels of Ecological Organization
[Free Registration/Login may be required to access all resource tools.] Ecosystems are organized into several different levels, and they can be studied at any one of the various levels of organization. Learn more about levels of...
Other popular searches
- Ck Word Ending
- Consonant Digraph Ck
- Ck Sound
- Ck Digraph Words
- Digraph Ck
- Words Ending in Ck
- Ck Spelling Games
- Ck Words
- Consonant Blending of Ck
- Ck Pictures
- Farmer Duck Ck Phoneme
- Ck Ng Qu X Sounds