Take Brief Notes
W.3.8
Read the text, then answer the questions.
Why Swallows Leave
Swallows do not leave Britain because of the cold. They leave because of the insects. A swallow eats flying insects, and it catches them in the air. In October the insects disappear, and a bird that eats nothing else has to follow the food. So swallows fly to southern Africa: about six thousand miles, taking roughly six weeks. They travel by day and feed as they go. They lose about a third of their body weight on the way. Many do not arrive. The following spring they return, and a swallow will often nest in the very barn it hatched in.
- 1. How is this text organised?
- 2. How much weight do they lose?
- 3. The author opens by saying it is not the cold. What reason is given instead?
- 4. How long does the journey take?
Morse Code
Morse code turns every letter into a pattern of short and long signals: dots and dashes. The commonest letters were given the shortest patterns. E is one dot. T is one dash. Q, which is rare, is dash-dash-dot-dash. Because of that choice, an average message is much shorter than it would be otherwise. A message can be sent as sound, as light, or as taps on a pipe. That is why it survived so long: it needs almost no equipment. Timing carries the meaning. A dash is three times as long as a dot. The gap between letters is three dots long, and between words, seven. SOS was chosen because it is easy to recognise: three dots, three dashes, three dots.
- 1. How is this text organised?
- 2. What is the Morse pattern for SOS?
- 3. How long is a dash compared with a dot?
- 4. The author says Morse survived a long time. What reason is given?
LessonPrint · W.3.8 · Set 21 · free to copy for classroom use