IV. Read the following passage and do as direct. (17-22)
The universe is a big and mysterious place. There are so many questions we still don't have answers to!
One day, our sun will die, but that won't happen for a very long time. Scientists are already thinking about how humans could survive if that happens.
In space, no one can hear you play guitar. That's because sound needs air to travel, and there's no air in space!
We don't know if there's life on Mars or other planets yet, but scientists are always looking for signs.
Big meteors hitting Earth are very rare, but it's possible. That's why scientists watch the sky carefully.
Believe it or not, the animal that causes the most human deaths is the mosquito!
There are billions and billions of stars and planets in the universe. It's hard to count them all!
If aliens came to Earth, we don't have an official plan to greet them. But many people have ideas about how we could say hello!
The universe is full of amazing things to learn about!
