28 수소, 미래 에너지의 열쇠가 될까?

Reader's Bank_Level 7_Unit 10                                    Reading Text

The world is rapidly running out of fossil fuels. This makes the prices of coal, oil, and natural gas go up. To solve the problem, scientists are focusing on hydrogen.

Hydrogen is ideal for many reasons. First, it is a renewable energy source. We do not need to worry about running out of it. Since it is made from water, it turns back into water after use. Hydrogen also produces water vapor when burned. It does not emit smoke or pollute the environment. That’s why it is called “clean energy.”

However, we need to find a cheap way to make hydrogen. Producing hydrogen requires special equipment. This costs a lot of money. Another problem is that hydrogen may explode while being stored under extreme pressure. When that happens, the damage will be severe. If we can solve these problems, hydrogen will be a safe and sustainable energy source.

29 아이슬란드와 그린란드 이름의 유래

When you think of Iceland, you probably imagine a very cold place covered with ice.

But that’s not true. Although Iceland is located quite far north, it is warmed by the Gulf Stream and its natural hot springs. Only 11% of Iceland is covered with ice, and it is mostly green in the summer. So why is it called Iceland? A Viking explorer, Flóki Vilgerðarson, named the island “Iceland” after seeing ice along its coast. He possibly chose this name because of the harsh winter he experienced.

Greenland, on the other hand, makes you think of a land covered with plants. Most of Greenland, however, is covered with ice. It was named by Erik the Red, another Viking. After he committed a crime in Iceland, he was made to leave the island.

He then went sailing and discovered a freezing place covered with ice. He wanted to attract settlers to the place, so he named it Greenland. His trick worked well, and many Vikings moved to Greenland.

30 냄새로 자기 짝을 찾는다?

Did you know that animals often pick their friends based on how they smell? It’s true! And guess what? People do the same thing!

Every single person has a special smell that’s all their own. This smell is determined by the immune system. The immune system is like a superhero inside your body that fights off germs and keeps you healthy. Since everyone’s immune system is different, some people are better at fighting off certain illnesses than others.

When two people with different immune systems have children, their kids are more likely to be healthy and strong because they inherit a mix of good defenses against sickness! It’s like having a super-powered immune system!

Scientists think that’s why we are naturally attracted to people who smell different from us. It’s nature’s way of making sure our kids get the best chance at being healthy. So, if you’re trying to find the right person for you, don’t forget to trust your nose. It might just lead you to someone special!