Flowering Phenology: How Do Plants Know When To Flower?

Eight neat slides lead to the understanding of how geologists have determined Earth's age. Most of the slides are dedicated to explaining the absolute dating method of assessment. Color diagrams display radioactive isotopes and a graph...

Continents are on the move! An engaging lesson explains the acceptance of the idea of continental drift. The narrator of the It's Okay to Be Smart "Earth Science Videos!" installment considers the convincing evidence of the concept. 

Plants react to many different stimuli, but do they think? After many years, scientists now have a definite answer. A video shares the theories and facts as part of a larger biology playlist. From plants listening to music to plants...

The universe is 90 billion light years in diameter. How do scientists measure something so huge? Space Time explains the process as part of its larger Cosmology playlist. The video addresses the steps to solving the puzzle as well as how...

Students study the process of plant reproduction and the biotic and abiotic factors that affect flowering phenology. For this plant reproduction lesson, students describe the interaction of environmental factors as it relates to...

How do scientists know what they do about evolution? Looking at fossilized data, paleontologists examine fossils to show the evolution and changes that developed into modern whales. We find out that scientists use physical evidence,...

It seems like a simple process: we breathe in, our nose detects different scents, and our brain interprets the smell. But how does it actually work? How can something smell like vanilla to one person, but like urine to someone else? How...

We know plants assist in the water cycle, but how do plants get water from the ground into the air? Through a series of demonstrations or labs, scholars observe the movement of water through plants. They microscopically view the cells...

Out of all vertebrates, the largest brain when compared to body size belongs to humans. Studying the working brain presents challenges to scientists. Learn about three of the most common tests used to understand how the living brain...

Some aquifers took thousands of years to collect water, yet they have been depleted in only a hundred years. Viewers learn about where humans use water and the serious concerns for the future of the water supply in the second of 10...