Unit 15: Space Conquest

A ………. is an enormous system of stars in outer space.

• A. universe

• B. solar system

• C. comet

• D. galaxy

Answer explanation

- universe: refers to everything that exists, including galaxies

- solar system: consists of 8 planets orbits around the sun

- comet: cosmic snowballs of frozen gases, rock, and dust that orbit the Sun.

- galaxy: a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity.

In July of 1975, the first US-Soviet joint ……… occurred with the Apollo-Soyuz project.

• A. mission

• B. performance

• C. company

• D. relation

Aircraft flying in …….. arcs create microgravity for tests and simulations that last 20 - 25 seconds.

• A. circular

• B. parabolic

• C. straight

• D.oval

Answer explanation

Fun fact : How is microgravity created?

NASA uses airplanes to create microgravity for short periods of time. The airplane does this by flying in up-and-down parabolas. At the top of the parabola, people and objects inside the airplane are in free fall for about 20-30 seconds at a time.

Yuri Gagarin became the first person to eat and drink in …………

• A. weightless

• B. gravity

• C. specific gravity

• D. microgravity

Answer explanation

Microgravity is the condition in which people or objects appear to be weightless.

A/an _____ is a person who is trained for traveling in a spacecraft.

• a. astronaut

• b. scientist

• c. engineer

• d. technician

_______ is the empty area outside the Earth’s atmosphere, where the planets and the stars are

• a. The Sun

• b. The Earth

• c. The Moon

• d. Space

In 1957, the Soviet Union launched the first satellite to orbit the Earth

• a. circle

• b. fly

• c. get back to

• d. attract

Gagarin could have another space flight if a tragic accident hadn’t occurred

• a. happened

• b. lasted

• c. viewed

• d. dealt

Can we never know precisely what would happen in space?

• a. interestedly

• b. approximately

• c. amusingly

• d. exactly

Neil Armstrong, an American ______, was the first man to step on the moon's surface.

• a. scientist

• b. cosmonaut

• c. astronaut

• d. astronomer

Answer explanation

Cosmonaut: for Russian astronaut

Astronaut: a person who is trained to travel in a spacecraft.

Astronomer: someone who studies astronomy