Fill in each blank with the correct word from the lesson.

1. On a clear night you can see about two thousand _______ with the naked eye.
2. It's powered by nuclear fusion, converting _______ into helium and releasing enormous energy.
3. Stars come in different sizes, _______s, and colours.
4. Stars and the Sun is an important topic in _______.
5. We can learn about _______ from this lesson.

Choose the best option for each question.

1. What is the Sun?
   a) A giant planetb) A moon orbiting Earthc) A star — a ball of hot gas powered by nuclear fusiond) A burning rock
2. How long does light from the Sun take to reach Earth?
   a) 8 secondsb) 8 hoursc) 8 minutesd) 8 days
3. What does a star's colour tell us?
   a) Its distance from Earthb) Its agec) Its temperature — blue is hottest, red is coolestd) Its size only

Write T for True or F for False in the brackets.

1. A star — a ball of hot gas powered by nuclear fusion is one of the key concepts in the lesson on Stars and the Sun.
2. A giant planet is the main topic of this lesson.
3. 8 minutes is one of the key concepts in the lesson on Stars and the Sun.
4. 8 seconds is the main topic of this lesson.

1. In your own words, explain what Stars and the Sun means.
2. List two things you learned from this lesson on Stars and the Sun.