Questions About the Facts
RI.2.1
Read the text, then answer the questions.
How Paper Is Recycled
Used paper does not become new paper by magic. It goes through five stages. First it is sorted. Card, newspaper and office paper are separated, because each makes a different grade of new paper. Second it is pulped. The paper is mixed with water and churned until the fibres come apart. Third it is cleaned. Staples, glue and ink are removed. Ink is lifted out with air bubbles. Fourth the pulp is pressed flat between rollers and dried. Fifth it is cut into sheets. Paper can be recycled about five to seven times before its fibres get too short to hold together.
- 1. How many times can paper be recycled?
- 2. How many stages does recycling paper take?
- 3. What is used to lift the ink out?
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 happens to the melted glass at the end?
- 2. How are metal lids removed?
- 3. What is crushed glass called?
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