Formation of Solar System

What is the primary reason stars, including the Sun, shine brightly?

• They are made of shiny materials.

• They are close to Earth.

• They reflect light from other stars.

• They generate tremendous energy.

How did the solar system begin to form?

• From a collision of two stars.

• From a giant cloud of dust and gas collapsing.

• From the explosion of a nearby star.

• From the merging of several smaller solar systems.

Which mnemonic can help remember the order of the planets from the Sun?

• My very elegant mom just served us noodles.

• My very eager mother just served us nine pizzas.

• My very easy method just speeds up naming.

• My very energetic monkey jumps swiftly under nets.

What is the term for a planet's movement around its own axis?

• Rotation

• Revolution

• Spinning

• Orbiting

What keeps the planets in their orbits around the Sun?

• The planets' own gravity

• The Sun's gravitational pull

• The rotation of the planets

• The presence of other stars

Why is Pluto no longer classified as a planet?

• It does not orbit the Sun.

• It is not round.

• It is too small.

• It has not cleared its orbital neighborhood.

Which of the following is NOT a celestial object found in our solar system?

• Comets

• Moons

• Asteroids

• Black holes