GRADE 6-THE SOLAR SYSTEM

Our solar system was formed ....

• 6.4 million years ago

• 4.6 billion years ago

• 6.4 billion years ago

• 4.6 million years days

It is believed that our solar system was formed by ....

• winds

• the waves

• a cloud of dust and gas

• a group of stars

A star called ........ exploded with a bang.

• the super dust

• the super star

• the supernova

• the super cloud

A solar nebula is a large cloud of ........

• gas and dust

• planets

• asteroids

• meteors

Infinite number of particles began to stick together and form clumps. Some clumps got bigger and bigger forming .....

• comets

• dwarf planets

• asteroids and stars

• planets and moons

Since the center of the .............................. was hot, it was easier for some planets to form in there.

• solar system

• solar nebula

• moon

• planets

The sun takes up ....... of the solar system's mass.

• 90

• 19

• 9

• 99