Latihan Soal IPA SMP » ProProfs Quiz Maker
Thursday, October 28, 2010
DNA Replication
1. Conservative theory: the double helix is not changed recently and immediately form a new double helix.
2. Dispersive theory: the double helix to falter and then cut it apart and form a new piece that will be continuous with the old pieces.
3. Semiconservative theories: the double helix separate tape so the single helix pair then formed a new band that complement. Semiconservative theory is the most accepted theory for the replication process.
Monday, October 18, 2010
Amazing close-up macro photographs of insects by John Hallmén
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Amateur bug photographer John Hallmén has been fascinated by insects since he was a boy. In the last three years he's made a name for himself by photographing the tiny creatures he finds in the Nackareservatet nature reserve near his home in Stockholm, Sweden. Using a mixture of studio and alfresco shots John magnifies the insects to show the beautiful colour and detail of his subjects
A large ant (Camponotus herculaneus)
Picture: JOHN HALLMÉN / BARCROFT MEDIA
Plan to bury Turkey's 'cancer city'
A village that has become known as Turkey's 'cancer city' could be knocked down and buried under 13 feet of dirt in an attempt to halt high rates of mesothelioma, lung problems and cancer among residents of the region.
Anatolia, Turkey: Tuzkoy village in central Anatolia has become known as Turkey's cancer city Photo: PHOTOLIBRARY
Tuzkoy village in central Anatolia, Turkey, is surrounded by large deposits of erionite, a fibrous mineral found in volcanic rocks.
The main cause of mesothelioma, a painful lung cancer, is erionite dust.
Murat Tuncer, chair of the unit for the fight against cancer in the health ministry, told the Harriyet Daily News & Economic Review that 46 people from the village had developed the disease this year, compared to a total of 65 in the country as a whole.
The death rate of people with mesothelioma was 700 to 800 per cent higher in Tuzkoy compared to rates throughout the world, he said.
Amid calls for the village to be destroyed, Mr Tuncer said that burying the buildings was not the only option and that people should simply be kept away from them.
There are already plans under way to move 80 per cent of the town's residents to new homes built one mile from the site of the eronite deposits.
Once people had been transferred to "New Tuzkoy", authorities would ensure that trees were planted on contaminated land to prevent erosion or the airborne transfer of the mineral, he said.
Experts have been working in the village for five years to identify the areas with the largest intensity of erionite. Mr Tuncer also said he expected the rest of the inhabitants to move into new houses within the next year.
Education - Save the Children
Education
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| A group of girls read outside a Save the Children supported girls primary school in Bosthaun, Afghanistan. |
Education is vital to lasting positive change in children's lives. Yet for millions of children and youth in developing countries, education is beyond reach. Save the Children reaches the world's most marginalized children — those who urgently need education to survive and thrive in more than 30 countries around the world.
Save the Children's Education programs reach children at risk — girls, ethnic minorities, and children affected by HIV/AIDS, wars, and other catastrophes — from early childhood through young adulthood.
We focus on communities in greatest need, design programs that minimize obstacles to participation, and make the content of education relevant to the realities of children’s lives.
Quality of learning at our schools is very high; typically children from Save the Children village schools score better on government exams than children enrolled in government schools.
Learn More
Watch our slideshow about educating Josna, a young girl, at a SHIKHON school in Bangladesh supported by Save the Children.
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| A young girl practices math at a Save the Children-supported school in Mali, Africa. Photo credit: Joshua Roberts. |
Visit our YouTube channel to watch a video diary in Mali by America Ferrera, Save the Children's Artist Ambassador for education, plus videos of our green playgrounds and preschools in Mozambique.
Learn about our global campaign to Rewrite the Future. Since 2007, this campaign has improved the quality of education for 10.6 million children living in war zones and emergencies.
Do More
Join the 1Goal campaign. The campaign, of which Save the Children is a member, seeks to engage 2010 World Cup soccer fans to ensure 72 million out-of-school children get access to education.
Last Updated April 2010
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