▸ Specimen Drawer
Materials & Substances — Lesson 17
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chipboard
ˈtʃɪpbɔːrd
A type of engineered wood made from compressed wood chips and synthetic resin — the bookshelf is made of chipboard.
The bookshelf is made of chipboard.
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cholesterol
kəˈlestərɑːl
A waxy, fat-like substance found in all cells of the body, essential for making — the doctor checked my cholesterol levels.
High cholesterol can lead to heart problems.
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chrome
kroʊm
Another word for chromium when it is used in dyes or pigments — the car has chrome bumpers.
The car has chrome bumpers.
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chromium
ˈkroʊmiəm
A hard brittle multivalent metallic element; resistant to corrosion and tarnishing — the periodic table places chromium between vanadium and manganese.
Chromium is added to steel to increase its resistance to corrosion.
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citrate
ˈsɪtreɪt
A salt or ester of citric acid — calcium citrate is commonly used as a calcium supplement.
Citrate is naturally present in citrus fruits like oranges and lemons.
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clapboard
ˈklæpbɔːrd
A long, thin board with one edge thicker than the other, used to cover exterior — we replaced the damaged clapboard on the side of the house.
The old cottage had beautiful clapboard siding that needed repainting.
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coal
koʊl
A hard black substance that is mined from the earth and used as fuel — the factory burns coal to make electricity.
The factory burns coal to make electricity.
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coals
koʊlz
Pieces of a black fuel that are burning or still hot, used for cooking or providing heat — we cooked the meat over the coals.
The campfire was full of glowing coals.
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cobalt
ˈkoʊbɒlt
A hard, shiny, silver-gray metallic element used in making steel, magnets, and — the phone battery contains cobalt.
Cobalt is a rare metal found in the Earth's crust.
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coke
koʊk
Carbon fuel produced by distillation of coal — the coke is very cold.
I drink a coke every day.
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colloid
ˈkɑːlɔɪd
A mixture with properties between those of a solution and fine suspension — milk is an example of a colloid.
Milk is an example of a colloid.
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combustible
kəmˈbʌstəbəl
A substance that can be burned to provide heat or power — petrol is highly combustible.
The combustible materials were stored in a special container.
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specimens catalogued
Mark each specimen as learned to complete this drawer.