Quiz 9 - Triple Y11: Astronomy

What is the correct order of size from largest to smallest?

• Universe, Galaxy, Solar System, Sun, Planets, Moons

• Galaxy, Universe, Solar System, Sun, Planets, Moons

• Solar System, Universe, Galaxy, Sun, Planets, Moons

• Universe, Solar System, Galaxy, Sun, Planets, Moons

Who invented the telescope and observed Jupiter's moons?

• Copernicus

• Ptolemy

• Galileo

• Newton

Which model places the Earth at the center with everything orbiting it?

• Heliocentric

• Geocentric

• Elliptical

• Circular

Which scientist is associated with the heliocentric model?

• Ptolemy

• Copernicus

• Galileo

• Newton

What is the main difference between circular and elliptical orbits?

• Circular orbits have constant speed, elliptical orbits do not.

• Circular orbits have changing speed, elliptical orbits have constant speed.

• Circular orbits are closer to the sun, elliptical orbits are further.

• Circular orbits are for comets, elliptical orbits are for planets.

What balances the centripetal force in both circular and elliptical orbits?

• Gravitational force

• Instantaneous velocity

• Constant speed

• Distance from the sun

What is the first stage in the life cycle of a star?

What is happening during the main sequence stage in the life cycle of a star?

What is the final stage in the life cycle of a massive star?

Why are main sequence stars stable?

• The gravity acting in is equal to the pressure acting out.

• The gravity acting out is equal to the pressure acting in.

• The gravity acting in is greater than the pressure acting out.

• The gravity acting out is greater than the pressure acting in.