Subject Words in a Text
RI.2.4
Read the text, then answer the questions.
Earthquakes
The Earth's crust is not one piece. It is broken into huge slabs called plates, and the plates are always moving — about as fast as your fingernails grow. Where two plates meet, they can catch on each other. Pressure builds up for years while they are stuck. When they finally slip, all that stored energy is released at once. The ground shakes. That shaking is an earthquake. Most earthquakes are too small to feel. A few are strong enough to bring down buildings, which is why new buildings in some places are made to sway.
- 1. What is a "plate" in this text?
- 2. What does "released" mean here?
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. What are "fibres" in paper?
- 2. What does "pulped" mean?
LessonPrint · RI.2.4 · Set 23 · free to copy for classroom use