The Solar System -- our home in space

Important Vocabulary Words From The Video


The lightest thing is the least heavy thing. The lightest object is the one that is the smallest and has the least weight.

  • The lightest object in the room is the TV.
  • The lightest color is the color that is the least dense.

To cool something is to make it less hot. You can cool something by using cold water or ice.

  • The ice cream was cooled by the cold water.
  • The sun was quickly going down, and the temperature was beginning to drop.

The coldest temperature that has been recorded in a city is -27 degrees Celsius. This is also known as the absolute coldest temperature that has ever been recorded.

  • The coldest temperature that has been recorded in the city this year is 21 degrees Celsius.

When something is tilted, it is not level. This can be a problem if you're trying to do something that requires perfect balance, like playing a sport.

  • The table is tilted, which is why the books are falling off.
  • The boat is tilted, which is why the water is coming in.

Ganymede is a moon of Jupiter. It is the largest moon in the solar system, and it has a very thick atmosphere.

  • Ganymede is very different from the other moons in the solar system.
  • Ganymede is the only moon in the solar system that has a solid surface.

A kuiper is a type of planet that orbits beyond the outer edge of the Solar System. These planets are very strange, and they usually have very cold temperatures and a very thin atmosphere.

  • The kuiper is a very strange planet, and it's not anywhere near the habitable zone.
  • The kuiper is a very cold planet, and it has a very thin atmosphere.

Indescribably is a very strong word that is usually only used in very serious situations. It is usually used to describe something that is so incredible, amazing, or surprising that words cannot do justice to it.

  • The film was indescribably beautiful.
  • The performance was indescribably moving.

Unimpressive is a word that is used to describe something that is not very good or impressive.

  • The performance was unimpressive, and the team lost the game.
  • His new invention was unimpressive, and nobody wanted to buy it.