▸ Specimen Drawer
Materials & Substances — Lesson 9
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crude
kruːd
A dark oil consisting mainly of hydrocarbons — the artist dismissed her early work as too crude.
The factory processes crude oil into usable fuels.
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dimple
ˈdɪmpəl
A chad that has been punched or dimpled but all four corners are still attached — she has cute dimples when she smiles.
She has cute dimples when she smiles.
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gasoline
ˈɡæsəliːn
A flammable liquid, usually obtained from petroleum, used as fuel in internal — the car needs more gasoline.
The car needs more gasoline.
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magma
ˈmæɡmə
Molten rock in the earth's crust — scientists study magma samples to understand volcanic activity.
Magma rises toward the Earth's surface during volcanic eruptions.
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material
məˈtɪriəl
The tangible substance that goes into the makeup of a physical object — cotton is a natural material.
What material is this shirt made of?
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nickel
ˈnɪkəl
A hard, silvery-white metallic element used to make coins, stainless steel, and — I found a nickel on the ground.
The nickel is a US coin worth five cents.
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acetone
ˈæsɪtoʊn
A colorless, volatile liquid ketone (C₃H₆O) commonly used as a powerful solvent — the lab uses acetone to clean glassware.
Acetone is commonly found in nail polish remover.
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acrylic
əˈkrɪlɪk
Polymerized from acrylonitrile — the sweater is made of 100% acrylic for warmth.
She mixed the colors directly on the canvas using acrylics.
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activator
ˈæktɪveɪtər
A substance or agent that causes something to become active, especially one — researchers discovered a new gene activator.
The enzyme activator speeds up the chemical reaction.
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active
ˈæktɪv
Chemical agent capable of activity — the volcano is still active.
She leads an active lifestyle.
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adamant
ˈædəmənt
Very hard native crystalline carbon valued as a gem — they stayed adamant in their refusal to negotiate.
She remained adamant that she would not change her decision.
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adhesive
ədˈhiːsɪv
A substance that unites or bonds surfaces together — the adhesive on the back of this sticker is wearing off.
I need a strong adhesive to fix this broken ceramic vase.
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▸ Catalogue Progress
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specimens catalogued
Mark each specimen as learned to complete this drawer.