20 Solar system Astronomy Quiz

What is a nebula primarily composed of?

• Hydrogen and oxygen

• Carbon and iron

• Hydrogen and helium

• Helium and oxygen

How long has our solar system existed?

• About 10 billion years

• About 5 billion years

• About 1 billion years

• About 20 billion years

What forces prevent a nebula from drifting apart?

• Magnetic force and gravity

• Gravity and pressure

• Electric force and pressure

• Pressure and magnetic force

What effect does gravity have on the particles in a nebula?

• It causes them to drift apart

• It has no effect

• It pulls them together

• It converts them into energy

What causes the particles in a nebula to move apart, producing pressure?

• The cooling of the nebula

• The gravitational pull from nearby stars

• The movement and collisions of particles

• The expansion of the universe

What is the role of gravity in the formation of a nebula?

• It causes the nebula to expand

• It pulls the particles of the nebula together

• It heats up the nebula

• It has no effect on the nebula

What happens when the pressure inside a nebula balances with the gravitational force?

• The nebula expands indefinitely

• The nebula shrinks and disappears

• The nebula remains the same size

• The nebula splits into multiple smaller nebulas

What can cause the balance between gravity and pressure in a nebula to be upset?

• The formation of planets within the nebula

• A supernova exerting force on the nebula

• The complete evaporation of the nebula

• The stabilization of temperature within the nebula

What are globules within a nebula?

• Expanding regions of gas

• Dense regions that can collapse to form stars

• Light-emitting particles

• Particles that repel each other

What is the first step in the formation of our solar system according to the solar nebula theory?

• The sun began to emit light and heat.

• A globule formed near the center of the solar nebula, which began to rotate and flatten into a disk.

• Planets started to form from gas and dust.

• Asteroids and comets were formed.