Main Topic of the Whole Text
RI.2.2
Read the text, then answer the questions.
How a Polar Bear Stays Warm
A polar bear lives where the sea freezes. It has three ways of keeping its heat in. Under its skin is a layer of fat up to eleven centimetres thick. Fat is a poor conductor, so heat does not pass through it easily. Above that is dense underfur, packed tight so cold water cannot reach the skin. On top are long guard hairs. Each one is hollow and clear, not white. They look white because they scatter the light, the way snow does. A polar bear is so well insulated that it can overheat if it runs too far.
- 1. Summarise this text in one sentence.
- 2. What is the main topic of this text?
How Glass Is Recycled
Glass is unusual. It can be melted and remade for ever without getting any worse. Bottles are first sorted by colour. Clear, green and brown glass have to be kept apart, because you cannot make clear glass from green. The glass is then crushed into small pieces called cullet. Metal lids are pulled out with a magnet. Cullet melts at a lower temperature than the raw materials glass is made from. That means recycling glass uses less energy than making it new. The melted glass is poured into moulds and blown into new bottles.
- 1. What is the main topic of this text?
- 2. Summarise this text in one sentence.
LessonPrint · RI.2.2 · Set 3 · free to copy for classroom use