Questions About the Facts
RI.3.1
Read the text, then answer the questions.
The Salmon's Return
A salmon hatches in a river, swims to the sea, and comes back years later to the river it was born in. It finds its way home by smell. Every river carries its own mixture of soil, rock and plants, and a young salmon learns that smell before it leaves. The return journey is upstream. The fish leap waterfalls, sometimes several metres high, and they do not eat once they enter fresh water. Because it is not feeding, a salmon uses up its own body on the climb. By the time it reaches the gravel where it hatched, it is thin and worn. There it lays its eggs. Most Atlantic salmon die soon afterwards.
- 1. Does a salmon eat on the return journey?
- 2. Where does a salmon hatch?
- 3. How does it find its way home?
How a Canal Lock Works
A canal cannot run uphill. Where the land rises, engineers build a lock: a chamber with a gate at each end. A boat going uphill enters the lock through the lower gate. The gate closes behind it. Sluices in the upper gate are opened. Water flows in from the higher stretch of canal, and the boat rises with it. No pump is needed, because the water comes down by gravity. When the water inside matches the level above, the upper gate can be opened and the boat moves on. Going downhill, everything runs the other way: the water is let out, and the boat sinks with it.
- 1. Which gate does a boat going uphill enter through?
- 2. What is a lock?
- 3. What are opened to let the water in?
LessonPrint · RI.3.1 · Set 25 · free to copy for classroom use