Complete the quiz and find out how much you know about Mars. Try to guess if you are not sure of the answers.How much do you know about MARS?1 Mars is the a_smallest planet in the solar system. a second b third c fourth2 The surface of Mars is covered in a a rocks b water ...
---It’s didmeter is 53%___that of the earth? A. A.as soon as B. B.as well as C. C.as wide as D. D.as much as 4 ---Do you know how long the diameter of the Mars? ---It’s didmeter is 53%___that of the earth? A.as soon as B.as well as C.as wide ...
bottled water industry was worth $94 billion, even with the rise of popular reusable water bottle brands. Oscar Wong / Getty Images For a natural resource that most of us have access to for minimal cost, water is doing pretty well as a revenue generator. Bottled water is a $94 billion...
The most enticing thing about Mars exploration is the promise of finding water— or past evidence of water. "Water is key because almost everywhere we find water on Earth we find life," NASA's web site points out. "If Mars once had liquid water, or still does today, it's compelling ...
Much of Earth’s freshwater is deep in the ground, unavailable to humans. The volume of the freshwater in all the lakes and rivers on Earth (available to humans) is about 22,339 mi3 (93,113 km3). That’s 9.3 x 1013 tons of water. So, only about 0.0067 percent of all the water...
Transportation will be much better. In the future, spacecrafts will travel very fast.Humans need food and water to live. Scientists will be able to find plants that can grow on Mars. These plants will give us food.2.We may easily jump too high and fly slowly away into space. So we ...
water on Mars.NASA(美国国家宇航局)sent two robots to Mars in June andJuly,2003.In January 2004,theywill travel to Mars at about 12,000 miles per hour.T he tworobots will then begin a 3-month stay to look for evidence(证据)of water and life from MarS.One day,human will travel to...
[03:33.04]The method makes the best use of resources [03:36.32]including water and nutrients. [03:40.00]The researchers said the tomato plants in intercropping [03:43.48]may have benefited from being close [03:45.84]to the...
water or had it at one point.And since most planetary scientists believe that water is essential to life, the presence of jarosite means that one prerequisite for life was once present on Mars.But there's another thing about jarosite.One step in its formation on Earth involves microorganisms;...
How much water is there on the moon? This is a question scientists have tried to answer for years. Scientists from China and the UK have now discovered that the moon may have water “reservoirs (水库)”, said a recent paper. Over billions of years, space rocks have hit the surface of...