▸ Specimen Drawer
Materials & Substances — Lesson 2
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log
lɔːɡ
A segment of the trunk of a tree when stripped of branches — we burned a log on the fire.
We burned a log on the fire.
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acid
ˈæsɪd
A chemical substance that has a pH less than 7 and can dissolve metals and burn — lemons contain citric acid.
Vinegar is an acid commonly used in cooking.
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aluminum
əˈluːmɪnəm
A silvery ductile metallic element found primarily in bauxite — the can is made of aluminum.
Aluminum is used to make lightweight aircraft.
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bronze
brɑːnz
A hard, brownish-yellow metal alloy made mainly of copper and tin, used since — the ancient statue is made of bronze.
The ancient statue is made of bronze.
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builder
ˈbɪldər
A substance added to soaps or detergents to increase their cleansing action — we hired a builder to renovate our kitchen.
My uncle is a builder and he works on construction sites.
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carbohydrate
ˌkɑrbəˈhaɪdreɪt
A carbohydrate is a type of nutrient found in foods like bread, rice, and — carbohydrates are an important part of a balanced diet.
Carbohydrates are an important part of a balanced diet.
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carbon
ˈkɑrbən
A chemical element with the symbol C and atomic number 6 — coal contains a high percentage of carbon.
Carbon is the main element in all living organisms.
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cardboard
ˈkɑːrd.bɔːrd
A stiff moderately thick paper — the moving boxes were made of cardboard.
The moving boxes were made of cardboard.
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cement
sɪˈment
Concrete pavement is sometimes referred to as cement — he used cement to repair the cracked wall.
The builders mixed cement with sand and water.
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chemical
ˈkemɪkəl
Material produced by or used in a reaction involving changes in atoms or molecules — the chemical formula for water is H2O.
This cleaning product contains harmful chemicals.
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clay
kleɪ
A very fine-grained soil that is plastic when moist but hard when fired — she used her hands to mold the soft clay.
The potter shaped the clay into a beautiful vase.
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copper
ˈkɑːpər
A reddish-brown metal element with the chemical symbol Cu, commonly used in — the pipe is made of copper.
Copper is an excellent conductor of electricity.
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▸ Catalogue Progress
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specimens catalogued
Mark each specimen as learned to complete this drawer.