The key answer of exercise 1
The key to exercise solutions in chapter 7 - Listening for the textbook Performer B2 - Student's Book with authors Marina Spiazzi, Marina Tavella, Margaret Layton from Zanichelli
Question
Discuss in pairs. Decide whether these scientific facts are true or not.
Answer
- True. Clouds consist of tiny water droplets or ice crystals suspended in the atmosphere, and their collective mass can be substantial, comparable to the weight of large aircraft.
- Likely true. Earth is teeming with microorganisms such as bacteria, fungi, and protists, many of which inhabit soil, making it plausible that there are more microorganisms in a teaspoon of earth than there are people on the planet.
- True. Research has shown that rats emit ultrasonic vocalizations resembling laughter when tickled, indicating positive social interaction analogous to human laughter.
- Controversial. While commonly believed, the Mpemba effect suggests that under certain conditions, hot water can freeze faster than cold water, though the circumstances are not fully understood.
- Likely true. Estimates suggest a vast number of stars in the Milky Way galaxy, likely outnumbering the estimated number of trees on Earth.
Similar Books
