Unlock 2 – Unit 8 – Reading 2 – Life on other planets – Quiz
Is Earth really alone in the universe? Scientists have long searched for signs of life beyond our planet, from microbes on Mars to habitable exoplanets orbiting distant stars. This reading explores the science behind the search for extraterrestrial life, the conditions needed for life to exist, and what discoveries might mean for humanity. Read the passage and put your understanding to the test with the quiz below.
About This Reading: Life on Other Planets
This reading is based on Unlock 2, Unit 8, Reading 2. As you read, think about what conditions scientists look for when searching for life – liquid water, a stable atmosphere, and the right distance from a star. These clues help astronomers decide which planets are worth studying further.
Key Vocabulary
- Extraterrestrial – originating from or existing outside Earth.
- Habitable – suitable for living in.
- Exoplanet – a planet that orbits a star outside our solar system.
To explore ongoing research in this field, see NASA’s Astrobiology program.
If you haven’t already, start with Unlock 2 – Unit 8 – Reading 1 – The Rise of Commercial Space Travel.
FAQ
What do scientists look for when searching for life on other planets?
Scientists look for liquid water, a stable atmosphere, and a planet’s distance from its star – conditions that could support life as we know it.
How do I complete this lesson?
Read the passage in your Unlock 2 textbook first, then answer the comprehension questions in the quiz above to check your understanding.
