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Most Watched in High School

01:32

The Scientific Method

Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements. Skeletal muscles are surrounded by a layer of connective tissue called epimysium, which helps protect the muscle. Beneath the epimysium, an additional layer of connective tissue, called perimysium, surrounds and groups together subunits of skeletal muscle called...

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00:55

Skeletal Muscle Anatomy

Newton's law of gravitation states that "Every particle of matter in the universe attracts every other particle with a force that is directly ...

Concept

01:06

Force

Forces affect every moment of our life. Our bodies are held to the Earth by force, and they are held together by the forces of charged particles. When we open a door, walk down a street, lift a fork, or touch a baby's face, we are applying force. Our body's atoms are held together by electrical forces, and the core of an atom, called the nucleus, is held together by the strongest force known to us—nuclear force. The study of motion is called kinematics, but kinematics only...

Concept

Most Watched in Middle School

01:29

Graphing and Analyzing Data

Graphs help scientists recognize patterns, make predictions, and explain observations. Organizing data into a graph makes it easier to understand and communicate scientific findings.

Concept

01:29

Interior of the Sun

The Sun is a massive ball of hot gases that provides light and heat to Earth. Scientists study its interior to understand how it produces energy and influences space weather. By learning about its layers, they can predict solar storms and determine how the Sun impacts our planet. Although we cannot see inside the Sun, advanced technology allows scientists to model and study its inner structure

Concept

01:18

DNA Structure

DNA, or deoxyribonucleic acid, is the molecule that carries genetic instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses. Its double-helix structure, discovered by James Watson and Francis Crick, allows it to store and transmit genetic information efficiently. DNA is composed of nucleotides, each containing a sugar,

Concept

Explore 20,000+ science videos - made for K12 educators

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High School

Middle School

Standards

Most Watched in High School

The Scientific Method

Skeletal Muscle Anatomy

Force

Most Watched in Middle School

Graphing and Analyzing Data

Interior of the Sun

DNA Structure

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