When did the first spacecraft land on a comet?
A.In 2014
B.In 1980
C.In 1986
D.In 1993
How did scientists study comets in the past?
A.By sending robots to the comets
B.With aliens
C.Sending astronauts to the space
D.through telescopes
How long did it take for Rosetta to land in the comet?
A.5 years
B.10 years
C.15 years
D.20 years
Why was Rosetta important?
A.It sent information about the comet to the Earth
B.It was moving the comet to avoid crashing with the planet
C.It was creating amazing videos
D.It was looking for life in the comet
What was difficult for Rosetta?
A.The gravity
B.The aliens
C.The speed of the comet
D.The size of the comet
With the information Rosetta obtained, scientists concluded that...
A.There is life on other planets
B.Comets are very fast and big
C.There is organic material in comets
D.Comets brought water to the Earth