Multiple choice

Atoms combine to form molecules which eventually form clouds of gas and dust are called _______.

  1. Galaxy

  2. Nebula

  3. Solar system

  4. Jupiter

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A nebula is a giant cloud of dust and gas in space. Some nebulae are regions where new stars are beginning to form, while others are the remnants of dead or dying stars. Atoms and molecules combine under gravity to form these vast clouds.