Read the text to answer the question number 4-5. Living in space is expensive. For example, our spacesuits cost a lot of money. Our homes have to be very carefully built, so they are expensive too and we have to bring all our food from the earth. But there is one thing you didn’t think about. We also earn a lot of money by living in space. We are able to do things that you can’t do on earth. For example, we get helium from Jupiter. As you know, helium is useful for energy, and we need it to make computer. We can also get fuel for cars from space. The fuel is called hydrogen. Where do you think we get hydrogen? The moon, everyone knows that. What doesthe text tell you about?

Text 5 A mangrove is a tropical marine tree. Mangroves have special aerial roots and salt-filtering tap roots which enable them to thrive in brackish water. Brackish water is salty but not as salty a...

Ants are social insects, which means they live in large colonies or group. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female worke...

Read the text to answer the question number 11-14. Living in space is expensive. For example, our spacesuits cost a lot of money. Our homes have to be very carefully built, so they are expensive to...

Text 5 Penguins are a group of flightless aquatic birds living almost exclusively in the Southern Hemisphere, particularly in Antarctica. Highly adaptive to live in the sea, penguins have countershad...

Text 5 A volcano is an opening in the Earth’s surface where molten rock can escape from underneath. The Earth’s surface is made up of tectonic plates, which are spreading apart, crunching into each...