Lesson 14

There are millions of _______________ in our solar system.

• astronomers

• astronauts

• asterisks

• asteroids

The first female _______________ was Valentina Tereshkova in 1963.

• asterisk

• asteroid

• astronaut

• astronomical

The telescope revolutionized _______________ observations.

• astronomical

• astronauts

• astronomer

• asterisks

An _______________ resembles a conventional image of a star.

• asteroid

• asterisk

• astronomer

• astronaut

My science professor is an _______________.

• asterisk

• astronomer

• asteroid

• astronomical

Have you ever been faced with a tough _______________?

• trio

• bilingual

• trilogy

• dilemma

Currently, at least one in five children is _______________.

• bilingual

• trio

• trilogy

• dilemma

The scout group consisted of a very _______________ group of boys of many nationalities.

• diverse

• dilemma

• trio

• bilingual

Which of the following is a three-part series?

• duo

• trilogy

• quartet

• quintet

What is the term for a group of three people or things?

• duo

• trio

• quartet

• quintet