Tree Bagging

Where does the mass for a growing tree come from? Scholars consider a few different hypotheses and guess which is correct. They then analyze data from different experiments to understand which concepts science supports.

Provide your class with the opportunity to view our carbon cycle close up. Young scientists research the cycle of oxygen as it completes the tasks of photosynthesis and respiration. They explore the importance of carbon in an ecosystem...

Looking for a tree-rific addition to your water cycle unit? Teams of young foresters examine the role of transpiration in the water cycle through a week's worth of activities. Pupils analyze how trees take in and transport water during...

The majority of this presentation is a collection of diagrams and graphs that back your lecture on biogeochemical cycles. The last few slides define ecosystems and the Gaia hypothesis. You may find these slides valuable, but will...

Students of chemistry are shown how to calculate the empirical formula from a molecule's mass composition. Sal uses a variety of elements from the Periodic Table to demonstrate the process and the calculations involved to arrive at the...

From stately oaks to towering pines, trees are the largest members of the plant kingdom that most people see. But how do trees get so big? Find out where the mass of a tree comes from with a short video. The narrator presents the topic...

The oceans contribute 37 trillion tons of water to land masses in the form of rain and snow. The third in a four-part series from NASA show satellite animations highlighting the precipitation on Earth. The videos show the movement of the...

Students explore the water cycle and associated phase changes. They predict what happens to the mass of an ice cube in a Ziploc bag, discuss and act out phase changes and diagram the water cycle.

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...

This is a very brief overview of the water cycle, but it does have a nice graphical representation.