Astronomy

What is the name of the phenomenon that most likely created our universe?

• The big boom theory

• The giant bang theory

• The cosmic explosion theory

• The big bang theory

Which of the following statements is NOT true about the Big Bang Theory?

• At first, our universe was in a hot and extremely dense state.

• Then, it exploded and created space (tér), energy, matter and time.

• As the radiation from the explosion decreased, the first atoms were formed, mostly carbon and iron.

• Atoms formed atomic clouds, and the gas within them had enough gravity to cause more atoms to collect. They will form the core of stars.

A large collection of stars, dust, and gas held together by gravity is a.........

• solar systerm

• galaxy

• constellation

• astronomy

What does a star mainly consist of? (Tick 2 boxes.)

• helium

• iron

• carbon

• hydrogen

Where is our solar system?

• In the Milky Road

• In the nuclear bulge of the galaxy

• On the Orion Arm

• In the Andromeda galaxy

___________ survive the trip through the atmosphere of our planet and hit the ground.

• Meteors

• Meteoroids

• Meteorites

• Comets

A(n) ____________ is a solar system body that consists of frozen gases, rocks and dust.

• comet

• meteoroid

• asteroid

• meteor

What happens in the core of a star?

• hydrogen and helium atoms are created

• nuclear fusion

• hydrogen atoms cool helium atoms down

• other stars born

What can we use to measure the distance of objects in our solar system?

• Astronomical unit

• Cosmic mile

• Astrological kilometre

• Light- year

Which statement is TRUE about our Sun?

• It has 2 movements: orbits the nuclear bulge of our galaxy system and rotates around its axis.

• It mostly consists of iron and oxygen.

• The nuclear fusion reactions in its core produce the gravity of Earth, thus making our planet habitable.

• Compared to other stars its size is huge.