Fjärilar Fjärilarna har en världsvid utbredning, och det är den näst största ordningen bland insekterna med cirka 150 000 olika arter. I Sverige finns drygt 2 800 arter. Vad kännetecknar fjärilar? Till fjärilarna räknas de insekter med två par vingar, som är mer eller mindre täckta av små vingfjäll. Det finns dock några arter vars honor helt saknar vingar. Nästan alla fjärilar har sugande mundelar som är formade som ett sugrör som kan rullas ihop. Vissa primitiva fjärilar äter fastare föda som exempelvis pollen, och de har käkar. Dag- och nattfjärilar Fjärilarna delas in i dagfjärilar och nattfjärilar. En hjälp är att titta på är antennerna. Dagfjärilarna är ofta färggranna och dagaktiva medan nattfjärilarna mestadels är kamouflagtecknade och nattaktiva - men denna regel har många undantag. Nattfjärilarna delas i sin tur upp i de onaturliga grupperna storfjärilar och småfjärilar, alltefter nästan enbart storleken. Fjärilar på vårenFjärilar på försommarenFjärilar i juliStörsta fjärilarnaÖvriga fjärilar
Individual Panoramas: Panoramic Images: Smithsonian National Museum of Natural History Dr. Dave Pawson is a Senior Research Scientist / Marine Biologist with the museum’s Department of Invertebrate Zoology primarily studying echinoderms, especially sea urchins, sea cucumbers, brittle stars, sea lilies, and their relatives. Over the course of his career, he has completed field work in a great variety of marine habitats all over the world. One good reason Dave Pawson has been so successful in his 50 years at NMNH is that he is good at finding things. (Left photo: Dr. He will also search through drawers and drawers of collections to find that one missing specimen. Dave Pawson, c. 1973 And in pursuit of the animals he studies, he has made more than 100 dives in manned submersibles down to depths of more than two miles. To read more about his accomplishments and research in his 50 years at NMNH, follow the links below: Or to try and find what you were really looking for, use the search box below.
Finding Points On A Globe Finding Points On A Globe Now that we understand the shape and size of our planet, let's consider the difficult challenge of measuring and describing points thereon. How, for example, do we tell someone who lives on the other side of the Earth where another object is located? In order to both study and navigate the Earth, it is important to have a system for describing locations accurately and mathematically. The simplest method for describing locations either on a planet, or on any flat object, is to create a grid. But wait a moment. Because the Earth is rotating around an imaginary axis, we can define a top and bottom.
Your Students Will Love MindPoint Quiz Show! « What’s New at Engaging Technologies MindPoint® Quiz Show presents ExamView® questions in a fun and engaging game show format. Students receive instant feedback (while having a hilariously competitive time), and teachers can track performance with a variety of reports. Quiz Show has graphics that appeal to elementary and middle school students, while its sister product Quiz Show SE is designed to appeal to older students (sample screens attached). The Quiz Show software works with ExamView tests and questions banks, as well as with CPS IR and RF response pads (Windows only). Contact us if you would like to see a demo of MindPoint® Quiz Show! Like this: Like Loading...
Sedimentary Rocks-A - Geology For Kids Sedimentary Rocks I Over the course of millions of years, the igneous rocks are weathered down by forces of wind and water. Fine particles of dirt begin to cover the landscape. Often, these small rock particles end up being suspended in water, and find their way to the bottom of lakes, streams, and the ocean. Slowly, the layer of sediment on the bottom of lakes, and especially on the bottom of the ocean grows deeper and deeper, reaching depths of thousands of feet. Solar System Scope Learn about Scientific Method Got a hunch about something but don’t know how to prove it? In this BrainPOP movie, Tim and Moby will walk you through the steps of the scientific method, which can be used to design any kind of experiment! First, Tim will show you how to make observations and develop inferences based on them. Watch the Science movie about Scientific Method »
The First Thanksgiving: Virtual Field Trip Video Webcast and Letters Signup Mayflower: Step aboard and explore an exact replica of the Mayflower, anchored at Plimoth Plantation, in this 20-minute video for all grades. Pilgrim Village: Get a behind-the-scenes look at the simple but arduous life of the Pilgrims in this 18-minute video for all grades. Wampanoag Homesite: Witness the day-to-day life of the indigenous people who were part of the Wampanoag Nation in this 17-minute video for all grades. Plimoth Plantation: Join the Pilgrims and Wampanoag as they discuss the first Thanksgiving in this 30-minute video for grades 3 and higher. Tour the fields and homes of the Pilgrims and watch the Wampanoag at work in this slideshow tour of the Pilgrim Village and Wampanoag Homesite.
Explain it with Molecules -- Interactive Molecules Just as the 20th century was marked by the development of electricity, telephones, aviation, computing, and private motor vehicles, the 21st century is being marked by significant progress in a broad spectrum of technologies, among them: molecular computing, genomics, rational drug design, and alternative energy. What is common to all these new technologies? They are all being made possible because of a greater understanding of The World of Molecules. Many questions that arise in K-12 education can be better understood by seeing and interacting with molecules in 3-D. Explain it with Molecules -- Interactive Molecules-- is about "real interactivity"! We have also included computer javascripts on many pages that will test students understanding of the material and make the exercises more interactive.