How long take the light to the sun to arrrive to the earth?, 10 minutes, 5 minutes, 8 minutes, 15 minutes, What is the smallest planet in the solar system?, Earth, Mercury, Mars, Venus, How many satellites have Venus?, 0, 1, 2, 3, What protects the earth from ultraviolet radiation?, Atmosphere, Moon, Greenhouse effect, Ozone layer, Which measures the highest mountain on Mars?, 22 Km, 38 Km, 16 Km, 50 km, How many years has the great red spot lasted?, 100 year, 300 years, 500 years, 800 years, Which planet is known for its ring systems?, Venus, Mercury, Saturn, Uranus, Why is it impossible to land on the planet Uranus?, Space probes don't go that far, Shipping would cost a lot of money, Its atmosphere is too dense and unstable to enter, There is no surface to land, Why do the sun's rays reach Neptune weakly?, There are too many obstacles between the Sun and the planet, The structure of the planet is not adequate for the arrival of light, It is the furthest planet from the sun, Because its orbit is too irregular for the arrival of the sun's rays, What phenomenon on Earth is affected by the Moon?, Tides, Storms, Photosynthesis, The color of the sky

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