viernes, 12 de marzo de 2010
writing Tangier
Tangier bazaars of Pentecost and its beautiful architecture provides a delicious taste of the Orient, it has great sports facilities including golf, tennis and Sailin. water sports can be enjoyed along its magnificent coastline which have Beache. you can try your luck at the casino he or windows on the boulevards of the great neighborhood. mendoubia beautiful gardens, a magnificent place and antiques are among the attractions that Tangier has to offer
LOOK NATURE IN THE EYE
For more than 30 years, National Geographic has been the leader in wildlife programming. Now, against a global backdrop of increasingly urgent conservation challenges facing wildlife, Nat Geo Wild is giving the animal kingdom center stage as it features the work of some of the world’s foremost explorers, filmmakers and scientists.Scheduled to launch in spring 2010 in both standard and high definition, Nat Geo Wild will traverse the globe to bring you the most extraordinary stories of our natural world in more compelling and visually dynamic ways than ever before. New series and specials will feature the latest technology to immerse viewers in the mysterious and entertaining lives of nature’s ferocious fighters and gentle creatures of land, sea and air.Nat Geo Wild premiere specials, new series and blue chip programming will include Africa’s Lost Eden, which takes you to war-torn Mozambique, where park rangers are desperately trying to execute one of the most ambitious animal relocation efforts in history and restore one of their country’s greatest natural treasures. Then, travel to Jaipur, India, where an audacious troop of Rebel Monkeys is on a crime spree. In Expedition Wild with Casey Anderson, the naturalist treks to Yellowstone and Alaska’s Kodiak Island to learn more about wild bear behavior — and teach these skills to his grizzly pal, raised in captivity. Two National Geographic Explorers lead you through very different paradises: Mireya Mayor delves deep into Congo’s forests to enter the private world of the Mystery Gorillas, and Enric Sala plunges into shark-filled waters to learn the secrets of Predator Island.Get closer to the world of animals
future
I love London. I will probably gosignal word: probably → future I (will) there next year.
Our train leavestime table → simple present at 4:47.
What (Your answer: »going to weared you«) are you wearingnear future → present progressive OR future I (going to) at the party tonight?
I haven't made up my mind yet. But I think I will findsignal word: I think → future I (will) something nice in my mum's wardrobe.
This is my last day here. I am goingnear future → present progressive OR future I (going to)Note: 'go' is usually used in present progressive to avoid the repetition (going to go). back to England tomorrow.
Hurry up! The conference beginsschedule → Simple Present. in 20 minutes.
My horoscope says that I will meetYou can't do anything to change that, it's in the stars. ;o) → Future I (will) an old friend this week.
Look at these big black clouds! It is going to rainsomething (the black clouds) is indicating that an event is going to happen in the near future → future I (going to) .
Here is the weather forecast. Tomorrow will beYou can't do anything about the weather → Future I (will) dry and sunny.
What does a blonde say when she sees a banana skin lying just a few metres in front of her? - Oh dear! I am going to slipsomething (the blonde and the banana skin) is indicating that an event is going to happen in the near future ;o) → Future I (going to)
Our train leavestime table → simple present at 4:47.
What (Your answer: »going to weared you«) are you wearingnear future → present progressive OR future I (going to) at the party tonight?
I haven't made up my mind yet. But I think I will findsignal word: I think → future I (will) something nice in my mum's wardrobe.
This is my last day here. I am goingnear future → present progressive OR future I (going to)Note: 'go' is usually used in present progressive to avoid the repetition (going to go). back to England tomorrow.
Hurry up! The conference beginsschedule → Simple Present. in 20 minutes.
My horoscope says that I will meetYou can't do anything to change that, it's in the stars. ;o) → Future I (will) an old friend this week.
Look at these big black clouds! It is going to rainsomething (the black clouds) is indicating that an event is going to happen in the near future → future I (going to) .
Here is the weather forecast. Tomorrow will beYou can't do anything about the weather → Future I (will) dry and sunny.
What does a blonde say when she sees a banana skin lying just a few metres in front of her? - Oh dear! I am going to slipsomething (the blonde and the banana skin) is indicating that an event is going to happen in the near future ;o) → Future I (going to)
the passive
1) Mr Jones watches the film.
The film is watched.
2) The people speak English.
English is spoken.
3) He reads comics.
Comics are read.
4) We play volleyball.
Volleyball is played.
5) They sing the song.
The song is sung.
6) I take photos.
Photos are taken.
7) She does the housework.
The housework is done.
8) The policemen help the children.
The children are helped.
9) He writes text messages.
Text messages are written.
10) Mother waters the flowers.
The flowers are watered
The film is watched.
2) The people speak English.
English is spoken.
3) He reads comics.
Comics are read.
4) We play volleyball.
Volleyball is played.
5) They sing the song.
The song is sung.
6) I take photos.
Photos are taken.
7) She does the housework.
The housework is done.
8) The policemen help the children.
The children are helped.
9) He writes text messages.
Text messages are written.
10) Mother waters the flowers.
The flowers are watered
Ask questions
1. The book has twenty chapters. =>HOW MANY CHAPTERS DOES THIS BOOK HAVE?
2. I bought a colour screen. => WHAT DID YOU BUY ?
3. He has dumped his new girlfriend. => WHAT HAS HE DONE ?
4. They have bought a new car. => WHAT HAVE THEY BOUGHT?
5. Your cat has destroyed my shirt. => WHAT HAS MY CAT DESTROYED ?
6. They wasted a lot of time. => WHAT DID THEY WASTE ?
7. She cut her arm. => WHAT DID SHE CUT?
8. Sandra has argued with her father. => WITH WHOM HAS SANDRA ARGUED?
9. He left by 3 p.m. => WHEN DID HE LEAVE ?
2. I bought a colour screen. => WHAT DID YOU BUY ?
3. He has dumped his new girlfriend. => WHAT HAS HE DONE ?
4. They have bought a new car. => WHAT HAVE THEY BOUGHT?
5. Your cat has destroyed my shirt. => WHAT HAS MY CAT DESTROYED ?
6. They wasted a lot of time. => WHAT DID THEY WASTE ?
7. She cut her arm. => WHAT DID SHE CUT?
8. Sandra has argued with her father. => WITH WHOM HAS SANDRA ARGUED?
9. He left by 3 p.m. => WHEN DID HE LEAVE ?
miércoles, 10 de marzo de 2010
Einstein's Gravity Confirmed on a Cosmic Scale
The theory of gravity proposed by Albert Einstein nearly a century ago can explain the dance of galaxies around one another just as well as it can model the motion of planets around the sun, according to a new study.
The finding suggests that the invisible substance called dark matter and the even more mysterious force known as dark energy are not just figments of physicists' imaginations.
For centuries Isaac Newton's law of universal gravitation worked well enough to explain gravity on Earth. But astronomers eventually saw discrepancies in the way larger objects such as planets interacted.
Einstein's general theory of relativity, published in 1916, proposed that gravity works on large scales because matter warps the fabric of space and time, also known as space-time. (See "Einstein and Beyond" in National Geographic magazine.)
This notion has been used to successfully explain phenomena in our solar system, such as the slight alterations in Mercury's orbit around the sun, which Newton's gravity couldn't account for.
The existence of dark matter and dark energy is based on the assumption that Einstein's gravity is affecting galaxies billions of light-years from Earth in the same way that it affects objects in our solar system.
Based on general relativity, for example, scientists think dark matter exists because some cosmic objects behave as if they have more mass than we can see.
But until now, tests of general relativity on galactic scales have been inconclusive.
Einstein's Gravity and Galaxy Clusters
For the new study, appearing this week in the journal Nature, astrophysicist Reinabelle Reyes and colleagues looked at data gathered from more than 70,000 bright, elliptical galaxies.
The team found that the galaxies, located up to 3.5 billion light-years from Earth, are clustered together in precisely the way that general relativity predicts.
"From the galaxies' positions, we can tell how clustered they are. That gives us information about how gravity acts, because that's what gravity does—it pulls things together," said Reyes, of Princeton University in New Jersey.
By combining measurements of the galaxies' clustering with other properties—such as the galaxies' movements relative to one another and the way they bend each other's light—Reyes's team calculated EG, a quantity physicists use when looking at objects' expected interactions.
General relativity predicts that EG should be around 0.4. The value of EG measured in the study was 0.39.
Still Greater Distances to Probe
The new findings validate the current popular model of cosmology, said David Spergel, a theoretical astrophysicist also at Princeton.
"It looks like things are okay," Spergel said. "It would have been more exciting if they saw deviations [from general relativity], but their results are important as well."
The study authors also note that their work casts serious doubt on some alternative theories of gravity, such as tensor-vector-scalar gravity, or TeVeS, which attempts to explain how gravity might work differently on large cosmic scales.
TeVeS predicts that EG should be around 0.22—much lower than the observed value.
It's still possible, however, that TeVeS takes over at even larger distances not yet explored.
"There's always a possibility that things are breaking down where you haven't probed yet," Spergel said.
Future space missions, such as NASA's Joint Dark Energy Mission and the European Space Agency's Euclid mission, will be required to test general relativity across these larger distances, the scientists say
The finding suggests that the invisible substance called dark matter and the even more mysterious force known as dark energy are not just figments of physicists' imaginations.
For centuries Isaac Newton's law of universal gravitation worked well enough to explain gravity on Earth. But astronomers eventually saw discrepancies in the way larger objects such as planets interacted.
Einstein's general theory of relativity, published in 1916, proposed that gravity works on large scales because matter warps the fabric of space and time, also known as space-time. (See "Einstein and Beyond" in National Geographic magazine.)
This notion has been used to successfully explain phenomena in our solar system, such as the slight alterations in Mercury's orbit around the sun, which Newton's gravity couldn't account for.
The existence of dark matter and dark energy is based on the assumption that Einstein's gravity is affecting galaxies billions of light-years from Earth in the same way that it affects objects in our solar system.
Based on general relativity, for example, scientists think dark matter exists because some cosmic objects behave as if they have more mass than we can see.
But until now, tests of general relativity on galactic scales have been inconclusive.
Einstein's Gravity and Galaxy Clusters
For the new study, appearing this week in the journal Nature, astrophysicist Reinabelle Reyes and colleagues looked at data gathered from more than 70,000 bright, elliptical galaxies.
The team found that the galaxies, located up to 3.5 billion light-years from Earth, are clustered together in precisely the way that general relativity predicts.
"From the galaxies' positions, we can tell how clustered they are. That gives us information about how gravity acts, because that's what gravity does—it pulls things together," said Reyes, of Princeton University in New Jersey.
By combining measurements of the galaxies' clustering with other properties—such as the galaxies' movements relative to one another and the way they bend each other's light—Reyes's team calculated EG, a quantity physicists use when looking at objects' expected interactions.
General relativity predicts that EG should be around 0.4. The value of EG measured in the study was 0.39.
Still Greater Distances to Probe
The new findings validate the current popular model of cosmology, said David Spergel, a theoretical astrophysicist also at Princeton.
"It looks like things are okay," Spergel said. "It would have been more exciting if they saw deviations [from general relativity], but their results are important as well."
The study authors also note that their work casts serious doubt on some alternative theories of gravity, such as tensor-vector-scalar gravity, or TeVeS, which attempts to explain how gravity might work differently on large cosmic scales.
TeVeS predicts that EG should be around 0.22—much lower than the observed value.
It's still possible, however, that TeVeS takes over at even larger distances not yet explored.
"There's always a possibility that things are breaking down where you haven't probed yet," Spergel said.
Future space missions, such as NASA's Joint Dark Energy Mission and the European Space Agency's Euclid mission, will be required to test general relativity across these larger distances, the scientists say
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