Read the Following Selection
Read about pearls, or click on the play button below to listen aloud.
You sometimes see pearls on rings, bracelets, and necklaces. Did you ever wonder where pearls come from? There are two different kinds of pearls.
Saltwater pearls are formed inside oysters that live in oceans. Oceans have salty water, so pearls from the ocean are called saltwater pearls.
Oysters have a shell that opens up like a mouth. Once in a while, a tiny object such as a piece of sand gets inside an oyster. The oyster makes something called nacre (say it like this: nay-ker). Nacre is smooth and is usually white. Layers of smooth nacre build up around the object. A pearl is a tiny object that is covered by many layers of nacre.
Mussels are another underwater animal with a shell that opens. Mussels live in lakes and rivers. The water in lakes and rivers is not salty, so it is called fresh water. Pearls that form in mussels are called freshwater pearls. Mussels make pearls in the same way that oysters do.
Pearls Are Rare
It does not often happen that an object gets inside an oyster or mussel and is turned into a pearl. People have to look in many oysters or mussels to find just one with a pearl inside. Pearls are expensive because they are rare. Imagine how many oysters or mussels people have to check to find enough pearls to make a whole necklace of pearls!
Fact File: Pearls are not always round and not always white. They come in different shapes and colours.
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1. Complete the sentence.
A pearl is made of many __________________ of nacre.CorrectIncorrect
2. Pearls are expensive because they are rare. What does rare mean?CorrectIncorrect
3. Choose each piece of information that is true about freshwater pearls.CorrectIncorrect
A cause is something that makes something happen. It answers the question “why did this happen.”
An effect is what happened as a result of the cause. It answers the question “what happened.”
4. Which sentence tells the cause? Which sentence tells the effect? Drag each sentence to the correct spot.
- Layers of nacre build up around a tiny object in an oyster or mussel.
- A pearl is formed.
5. Fill in the blank using information from the text.
A pearl is a tiny that is covered by many layers of nacre.