Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. Mars can easily be seen from Earth with the naked eye. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth. The rotational period and seasonal cycles of Mars are likewise similar to those of Earth. Mars is the site of Olympus Mons, the highest known mountain in the Solar System, and of Valles Marineris, the largest canyon. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Unlike Earth, Mars is now geologically and tectonically inactive. Geological evidence gathered by unmanned missions suggest that Mars once had large-scale water coverage on its surface, while small geyser-like water flows may have occurred during the past decade. In 2005, radar data revealed the presence of large quantities of water ice at the poles, and at mid-latitudes. The Phoenix lander directly sampled water ice in shallow martian soil on July 31, 2008.
•Perhaps your sister will accompany to the doctor?
•I am going to spend the money i've been saving for the last five months on a new laptop.
•Will Jesse be back soon ? I need to talk to her.
•I'm going to eat more sweets before dinner. I promise.
• I hope I will be happy when I grow up.
• I will call Liz a soon as I'm back
• Mum has both Alex floor and fruit she's going to bake a cake
• next year my sister is going to learn how to drive a car
• we are going to meet our cousin tonight
• Will you lend me a biro? I've got nothing to write with.
Are there any flowers in the classroom?
Has she bought a new dress?
Has he ever learn poems?
Did they help their mother yesterday?
Can your brother speak english?
Know-knew
think-thought
take-took
make-made
read-read
find-found
see-saw
go-went
fly-flew
fall-fell
