The Wonder of Weightlessness

In which decade did de US scientists begin working on the secret programme?

What was the name of the secret programme mentioned in the text?

Which other country was engaged in a secret space programme at the same time as the USA?

Which two countries currently offer zero-gravity flights?

• Canada and Ecuador

• Russia and Ecuador

• The USA and Canada

• France and Russia

What did US scientist simulate using a parabolic flight?

• the kinds of nausea astronauts might suffer

• the effects these flights have on animals

• the kind of weightlessness their astronauts would feel in space

• the time these flights take