In this video Paul Andersen explains how matter moves from the environment into living organisms and back into the environment. Food webs are used to show how matter and energy move through organisms. Ecological pyramids show that matter and energy are lost as they move from producers to consumers.
A song about photosynthesis. (1:58 min.)
High Definition time lapse of three tomato plants sprouting and growing. The days listed in the bottom left corner of the screen are days since planting. The text in the bottom right indicates when the plants were watered. (1:13 min.)
Simple explanations of flower parts, pollination, and double fertilization in angiosperms. (8:04 min.)
Is the weather on Mars anything like the weather on Earth? NOVA asked Vicky Hipkin from the Canadian Space Agency, who was part of the recent Phoenix Mission to explore conditions on the Red Planet.
Recently, astronauts were able to grow and eat lettuce in space! How was this possible?
As the International Space Station crew gets ready for the first on-orbit tasting of space-grown lettuce, NASA Commentator Lori Meggs talks with Paul Zamprelli of Orbitec, the company that developed the Veggie greenhouse with an eye toward supporting future deep space missions beyond Earth orbit.
NASA Commentator Lori Meggs speaks to researchers about Advanced Plant experiments on the International Space Station, in which they have already learned a great deal—and gotten some interesting surprises—about how plants grow in space.
Jessi and Squeaks show you how a tiny seed -- like the kind you eat in your trail mix! -- grows into a big plant!
In this video, discover the crucial factors in seed germination and learn how scientists are researching these factors to produce crops more quickly.
In this video, children can learn all about seeds. How seeds germinate, types of seed dispersal, parts of a seed and what are the functions of different parts of a seed. In short, a lesson all about seeds.
NASA Commentator Lori Meggs at the Marshall Space Flight Center speaks with Gioia Massa, project scientist for Veggie, a facility astronauts are using on the International Space Station to learn about how to grow lettuce and other vegetables in space, an ability which will be important in providing food for astronauts on future deep space exploration missions which cannot be resupplied from Earth.
Bill Nye describes the discovery of photosynthesis in the late 1700s by Joseph Priestley and Jan Ingenhousz.
Learn about the structure of a leaf in this video from the "Plant Biology" chapter of the Virtual School GCSE / K12 Biology.
From a chocolate chip cookie to a big, juicy strawberry, your favorite sweet snacks have one thing in common: sugar! Join Jessi and learn all about how sugar gets from plants to your kitchen table!