Browse Media Learn More

Free Membership - Access to more than just media

Families and school personnel (including those in training) who have at least one student with a disability can sign up for free membership.

Accessible Media

Standards-aligned videos with high-quality captions and audio description.

Teaching Tools

Create lessons and assign videos to managed Student Accounts.

Training Videos

Educator and sign language training videos for school personnel and families.
Learning Center

Find resources for providing equal access in the classroom, making media accessible, and maximizing your use of DCMP's free services.
Visit Learning Center

Accessibility Information

DCMP's Learning Center provides hundreds of articles on topics such as remote learning, transition, blindness, ASL, topic playlists, and topics for parents.

See All

Accessibility Guidelines

DCMP offers the only guidelines developed for captioning and describing educational media, used worldwide.
Captioning Key
Description Key

Help Center

Learn how to apply for membership, find and view accessible media, and use DCMP’s teaching tools.
Help Center
Continuing Education and Professional Development

DCMP offers several online courses, including many that offer RID and ACVREP credit. Courses for students are also available.
See All eLearning Resources

QuickClasses

Asynchronous, online classes for professionals working with students who are deaf, hard of hearing, blind, low vision, or deaf-blind.

See QuickClasses

Workshops

For interpreters, audio describers, parents, and educators working with students who are hard of hearing, low vision, and deaf-blind.
See Workshops

Modules

Modules are self-paced, online trainings designed for professionals, open to eLearners and full members.
See Modules

Students

These self-paced, online learning modules cover the topics of transition, note-taking, and learning about audio description.

See Student Courses
Make your educational content accessible and broadly available.

DCMP can add captions, audio description, and sign language interpretation to your educational videos and E/I programming.
Learn More

Accessibility

Captions are essential for viewers who are deaf and hard of hearing, and audio description makes visual content accessible for the blind and visually impaired.

Distribution

DCMP can ensure that your content is always accessible and always available to children with disabilities through our secure streaming platforms.

Meet our partners

DCMP partners with top creators and distributors of educational content. Take a look
About the Described and Captioned Media Program

The DCMP provides services designed to support and improve the academic achievement of students with disabilities. We partner with top educational and television content creators and distributors to make media accessible and available to these students.
Contact Us
Services

Captioning, audio description, and ASL services

Professional training for school personnel

Distribution of fully accessible streaming media

Projects

Media Center

Television Access

We Describe the World

YouTube Audio Description

Privacy and TOS

Privacy Statement

Terms of Service

Accessibility Policy

Mission and Funding

Read More

Hydrogen

10 minutes 27 seconds

Apply for Free Membership

Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

Browse Full-length Non-member Titles

Narrow curving tube exits into a wider tube. Both are underwater. Caption: whether hydrogen has a higher or lower density than air.

Demonstrates the production and collection of hydrogen in a chemistry lab, and testing of its purity. Also shows and explains other chemical reactions related to this element.

Media Details

Runtime: 10 minutes 27 seconds

Topic: Science
Subtopic: Chemistry, Science Experiments
Grade/Interest Level: 9 - 12
Standards:

Release Year: 2001
Producer/Distributor: Landmark Media
Series: School Chemistry Experiments
Report a Problem

Members Only - Apply Now

Open flame with a piece of metal in it. Flame below the metal is blue, above the metal is orange. Ca2+. Caption: Calcium compounds show a typical orange-red coloring.

Silvery metallic orb with iridescent spiky crystals adhering to the bottom. Caption: Iodine crystals are not only interesting

Narrow curving tube exits into a wider tube. Both are underwater. Caption: whether hydrogen has a higher or lower density than air.

Beaker of liquid with a yellow substance dissolving. Caption: It was formed by the oxidation of potassium iodide.

Test tube with aqua liquid in the bottom is immersed in ice water. Caption: and at low temperatures, the reaction is slowed down.

Person pouring clear liquid into 4 beakers. Caption: Nitric acid is a very strong oxidizing agent.

Broken pottery with a lump of metal on the ground. Caption: we find iron reduced from the iron(III) oxide.

A large beaker with a substance in the bottom, a smaller beaker suspended above it. Caption: and yet their properties are so different.

Beakers labelled 1M KOH, ind. and 1M HCI. Another beaker with a greenish liquid has a tube with a nozzle at the mouth of it. Caption: The neutral solutions will be changed

Measurement device with leads attached. A rectangular box filled with fluid and a person putting a lid on the box with two leads reaching into the liquid. Caption: An important part of the electrolysis cell