How old is Earth and how do scientists know the answer? Throughout history, many researchers, scholars, and leaders answered this question with varying degrees of accuracy. The 20th episode of Crash Course History of Science introduces...

Scientists know Earth's plates are constantly moving. One big question scientists have is, "When did they start moving?" PBS 6-8 Story of Earth series presents the research of one scientist trying to answer this question. Viewers learn...

During the Cambrian period, almost every major life form appeared on Earth for the first time. Scientists offer multiple theories about the sudden explosion of life and diversity during this period. The Shape of Life series focuses on...

Take it all the way back! Young scientists discover the changes that took place from the time Earth became solid to present day through an interesting interactive. The resource guides users through key events that have shaped our world...

Fungi are more than fun ... they're also functional! Most everyone knows they serve as Earth's decomposers, but ancient fungi took their job to a whole new level! An entertaining video from a large biology playlist examines the giant...

How did scientists unravel the mystery of an ancient beaver species? An engaging video from a well-written biology playlist discusses the discovery of strange spiral fossils found in Nebraska farm country. Junior paleontologists examine...

Some 4.565 billion candles would be needed for a birthday cake for Earth. Young scientists view a video to learn about historical attempts to determine the age of Earth. They see how advances in radioactive dating led to the currently...

Theoretical physicists say that space and time are one thing created by the Big Bang. According to them, nothing happened in the time before the Big Bang because time did not exist. The first Crash Course-Big History video in a 16-part...

Earth provides all of the systems needed for life, and how it does that is very complex. The video explains how Earth got here and what makes it special. It details its layers, the atmosphere, and human's place on the planet.

Planet Earth has come a long way from its dramatic beginnings. How long did all of these changes take? Science sleuths unravel the often-tangled timeline of our progress from single-celled sea creatures to world-traveling homo sapiens in...

Will all species follow the trilobite down the road to extinction? Discover the changing conditions on ancient Earth that led to both population explosions and mass extinctions with a video presentation. The narrator shows examples of...

How do you put 4.5 billion years into terms that young scholars can understand? Use your arms! Examine just how long our Earth has been around in a short video. The content includes the appearance of single-celled, then multicellular...

Your pupils may believe that you and their parents are the oldest things in the universe, but surprise! There are elements of the universe that are even older. Elementary scientists create a class timeline to demonstrate the expansive...

If rocks could talk ... maybe they can! A comprehensive presentation addresses the practice of reading rock formations. Examples of layering, cross-cutting, unconformity, and fossils complete the lesson. Photos provide pictorial evidence...

Class members play a version of the game Chronology to determine when certain scientific events occurred in history. Teams play until someone has 5-10 events in the correct order.

The first life on Earth developed in the oceans. As an introduction to ecology, the video starts with the formation of the earth. It follows with the Archaean and Proterozoic Eons including protobionts, prokaryotes, and eukaryotes. It...

Can you imagine Washington DC and London as close neighbors occupying the same continent? Learners will be fascinated as they step back in time and discover the evolution of the earth's continents and oceans from 4.5 billion years ago to...

It's commonly known that over 70 percent of of the earth's surface is covered by water, but exactly where did it all come from? Join this short video as it travels back to the beginning of the universe in search of the origins of this...

Earth historians research a specific dinosaur, write a paper about the Mesozoic era that it lived in, create an artistic rendition of the environment, and give a presentation in class about what they learned. Be aware that there are...

Cartoon children compare the earth's age to timescales that we understand:a calendar year, the thickness of a book, the human lifespan. This smart film clip is definitely worth adding to your geologic timescale lesson! If you subscribe...

Just a heads up: this activity is based on a book, Dinosaur Eggs Discovered! Unscrambling the Clues. If you do not have or do not want to purchase the book, you may still find the other activities and worksheets useful in your earth...

Interested Earth enthusiasts are introduced to ice ages. The 26,000-year cycle is charted and the eras named. Several slides are dedicated to the carbon cycle and how it contributes to the changes. The reasons for the cooling of the...

Earth historians review scale and then draw a geologic timeline, labeling major eras. In pairs, they research the periods and eons within each era. A list of important historical events is provided for them to mark on their completed...

After reading a passage about geological time and fossil evidence, Earth historians write answers to six questions about what they learned. They are also directed to design a board game that would teach players about the geological time...