Galaxies and the Universe Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. A star is 50 light-years away. When did the light we see now leave the star?
- A. Last year
- B. 50 years ago
- C. 50 000 years ago
- D. Today
2. The red shift of light from distant galaxies is evidence that:
- A. The galaxies are cooling
- B. Light slows down in space
- C. The Earth is at the centre of the Universe
- D. The Universe is expanding
3. What is the cosmic microwave background radiation?
- A. Radiation left over from the early hot Universe
- B. Light from the Milky Way
- C. Radio signals from aliens
- D. Waves from the Sun
4. Which statement about dark matter is correct?
- A. It gives out bright light
- B. It was seen directly by telescopes
- C. It gives out no light but has gravity
- D. It is made of stars
5. Why are some telescopes put into space?
- A. Space is closer to galaxies
- B. The Earth's atmosphere blocks or blurs some radiation
- C. Gravity is stronger in space
- D. Telescopes work only in space