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Home. Humpback whale. The humpback whale (Megaptera novaeangliae) is a species of baleen whale.

Humpback whale

One of the larger rorqual species, adults range in length from 12–16 metres (39–52 ft) and weigh approximately 36,000 kilograms (79,000 lb). Hammerhead Sharks - Hammerhead Pictures - Shark Facts. Hammerhead sharks are consummate predators that use their oddly shaped heads to improve their ability to find prey.

Hammerhead Sharks - Hammerhead Pictures - Shark Facts

Their wide-set eyes give them a better visual range than most other sharks. And by spreading their highly specialized sensory organs over their wide, mallet-shaped head, they can more thoroughly scan the ocean for food. One group of sensory organs is the ampullae of Lorenzini, which allows sharks to detect, among other things, the electrical fields created by prey animals. The hammerhead's increased ampullae sensitivity allows it to find its favorite meal, stingrays, which usually bury themselves under the sand.

Sharks and Remora Fish - Symbiotic Relationships. Top 10 Greenest Cities in the World. This week, DualCitizenLLC came out with the 4th edition of the Global Green Economy Index, an in-depth look at how 60 countries and 70 cities are doing in developing more environmentally friendly economies, in actual performance and in how experts perceive their performance.

Top 10 Greenest Cities in the World

We already took a look at the top ten countries—Scandinavia, take a bow! Student: Error. Traffic light. What causes climate change?

Just as the world’s most respected scientific bodies have confirmed that the Earth is getting hotter, they have also stated that there is strong evidence that humans are driving the warming (2). Scientists agree the main cause of climate change is human activities which magnify the ‘greenhouse effect’ – a natural process in which gases in the atmosphere warm the Earth by trapping heat that is radiating towards space (2) (4). A layer of greenhouse gases, including water vapour and smaller amounts of carbon dioxide, methane and nitrous oxide, act as a thermal blanket surrounding the Earth. This absorbs heat and warms the surface to a life-supporting average of 15°C. As energy slowly escapes out of our atmosphere, some of it is absorbed by the greenhouses gases, which warms the Earth further. Carbon dioxide (CO2) is the main greenhouse gas of concern. Fossil fuels The greatest source of man-made emissions is the burning of fossil fuels (2).

Practice and Training Tests. The Smarter Balanced Practice Test (updated in May 2014) and the Training Test (released in February 2014) provide students with an early look at sets of assessment questions aligned to the Common Core for grades 3-8 and 11 in both English language arts/literacy and mathematics.

Practice and Training Tests

Both resources will help teachers and students prepare for the Smarter Balanced Assessments. Practice Tests The Smarter Balanced Practice Test allows teachers, students, parents, and other interested parties to experience a full grade-level assessment and gain insight into how Smarter Balanced will assess students’ mastery of the Common Core. Climate change. What causes climate change?

Climate change

Just as the world’s most respected scientific bodies have confirmed that the Earth is getting hotter, they have also stated that there is strong evidence that humans are driving the warming (2). Scientists agree the main cause of climate change is human activities which magnify the ‘greenhouse effect’ – a natural process in which gases in the atmosphere warm the Earth by trapping heat that is radiating towards space (2) (4). A layer of greenhouse gases, including water vapour and smaller amounts of carbon dioxide, methane and nitrous oxide, act as a thermal blanket surrounding the Earth. This absorbs heat and warms the surface to a life-supporting average of 15°C. As energy slowly escapes out of our atmosphere, some of it is absorbed by the greenhouses gases, which warms the Earth further. Carbon dioxide (CO2) is the main greenhouse gas of concern.

ARKive - Discover the world's most endangered species. Carson House Social Studies. Assessment and Learning, K-12, Higher Education, Automated Tutor, Math. Music Tech Teacher, Music Quizzes, Games and Worksheets. Alex Lin, Teenage Activist. He's overseen the recycling of 300,000 pounds of e-waste.

Alex Lin, Teenage Activist

He's successfully lobbied the Rhode Island state legislature to ban the dumping of electronics. He's used refurbished computers to create media centers in developing countries like Cameroon and Sri Lanka to foster computer literacy. He’s Alex Lin and he’s just 16 years old. “I don’t see anything uncommon in it,” says Lin, a high school senior from Westerly, Rhode Island. “My friends and I have been doing this since fifth grade. Lin’s catalytic moment came in 2004 when he chanced upon a Wall Street Journal article. Dmitry Kabalevsky. Dmitry Borisovich Kabalevsky (Russian: Дми́трий Бори́сович Кабале́вский; 30 December [O.S. 17 December] 1904 – 14 February 1987[1]) was a Russian composer.

Dmitry Kabalevsky

Life[edit] Boris Klavdievich Kabalevsky and his son Dmitri and daughter Elena. St. Petersburg, 1909. Untitled. 13-year-old sensation Mo’Ne Davis throws two-hit shutout at Little League World Series. Alex Lin - Brower Youth Awards 2007. Alex Lin - Turning E-Waste Into E-Treasure. Alex Lin was a boy who was just reading the newspaper one day.

Alex Lin - Turning E-Waste Into E-Treasure

He read an article about something called e-waste. He learned that it is the waste generated as people upgrade electronic devices. When people are done with things like computers, phones, mp3 players, etc. and throw them away, that’s e-waste. Electronic Waste. Teen Activists and Issues.