Can you define this word? /so-lu-tion/ [s.ah0.l.uw1.sh.ah0.n]
solution star_border
/so-lu-tion/ [s.ah0.l.uw1.sh.ah0.n]
A solution is an answer to a problem. If you find an answer to a question, both the answer and how you got there is the solution. Teachers often ask students to find solutions to problems. The word can also mean a liquid in which something has been dissolved.
Example sentences using the word “solution”:
- The solution is simple/obvious: you need to spend less money.
- She made a solution of baking soda and water. (solution here means the water in which soda has been dissolved.)
- He rinsed the contact lens with saline solution. (solution here means the water in which saline has been dissolved.)
The phrase “solution to a something (problem, crisis..etc)” is often used. When the phrase "a solution to something" is used; it means finding a way to solve a problem or difficult situation so that the difficulty is removed.
Take a look at the examples below:
- There is no simple solution to the country's drug problem.
- She suggested a number of creative solutions to the housing crisis.
- The police haven't yet found a solution to this crime/mystery.
- The solutions to the math problems are in the back of the book.
- I can't figure out the solution to this puzzle.
Can you define this word? /ab-sorp-tion/ [ah0.b.z.ao1.r.p.sh.ah0.n]
absorption star_border
/ab-sorp-tion/ [ah0.b.z.ao1.r.p.sh.ah0.n]
Definition: The process by which one thing absorbs or is absorbed by another
Example sentences:
- Milk appeared to inhibit the antioxidant potential of the flavonoids, reducing their absorption into the bloodstream
Can you define this word? /acid/ [ae1.s.ah0.d]
acid star_border
/acid/ [ae1.s.ah0.d]
An acid is a chemical substance that has a pH value of less than 7. An alkali is a chemical substance that has a pH value of more than 7. There are many acids and alkalis. For example:
- Vinegar in a salad is an acid
- Vitamin C is an acid
- Salt is an alkali.
- Sodium is one of the alkali metals.
Can you define this word? /acidic/ [ah0.s.ih1.d.ih0.k]
acidic star_border
/acidic/ [ah0.s.ih1.d.ih0.k]
To describe acid and alkali, we can use the adjectives ‘acidic’ and ‘alkaline’.
The adjective “acidic” describe something containing an acid and having a pH less than 7. Here are example sentences:
- The water in a polluted lake is acidic
- Carbon dioxide is acidic.
- When an acid is dissolved in water we get an acidic solution.
The adjective “alkaline” describe something containing an alkali and having a pH greater than 7. Here are example sentences:
- Water can become alkaline as it seeps through rocks, picking up minerals such as calcium and magnesium.
- Alkaline chemicals can be harmful to our bodies.
Can you define this word? /acid-i-ty/ [ah0.s.ih1.d.ah0.t.iy0]
acidity star_border
/acid-i-ty/ [ah0.s.ih1.d.ah0.t.iy0]
Acidity is the level of acid in substances. Likewise, alkalinity is the level of alkali in substances. You can ‘increase/decrease the acidity/alkalinity’.
Here are example sentences:
- The pollution produced by carbon dioxide increases the acidity of the oceans and affects the marine food chain.
- We can decrease the alkalinity by adding more acidic chemicals.
Can you define this word? /alche-my/ [ae1.l.k.ah0.m.iy0]
alchemy star_border
/alche-my/ [ae1.l.k.ah0.m.iy0]
Definition: the medieval forerunner of chemistry, based on the supposed transformation of matter. It was concerned particularly with attempts to convert base metals into gold or to find a universal elixir.
Example sentences:
- In the second decade of the twenty-first century, alchemy is not only about the transmutation of metals, but the shift in consciousness that returns us from the physical to the non-physical.
- Throughout its history, alchemy has shown a dual nature. On the one hand, it has involved the use of chemical substances and so is claimed by the history of science as the precursor of modern chemistry.
Can you define this word? /al-ka-li/ [ae1.l.k.ah0.l.ay2]
alkali star_border
/al-ka-li/ [ae1.l.k.ah0.l.ay2]
An acid is a chemical substance that has a pH value of less than 7. An alkali is a chemical substance that has a pH value of more than 7. There are many acids and alkalis. For example:
- Vinegar in a salad is an acid
- Vitamin C is an acid
- Salt is an alkali.
- Sodium is one of the alkali metals.
Can you define this word? /al-ka-line/ [ae1.l.k.ah0.l.ay2.n]
alkaline star_border
/al-ka-line/ [ae1.l.k.ah0.l.ay2.n]
To describe acid and alkali, we can use the adjectives ‘acidic’ and ‘alkaline’.
The adjective “acidic” describe something containing an acid and having a pH less than 7. Here are example sentences:
- The water in a polluted lake is acidic
- Carbon dioxide is acidic.
- When an acid is dissolved in water we get an acidic solution.
The adjective “alkaline” describe something containing an alkali and having a pH greater than 7. Here are example sentences:
- Water can become alkaline as it seeps through rocks, picking up minerals such as calcium and magnesium.
- Alkaline chemicals can be harmful to our bodies.
Can you define this word? /al-ka-lin-i-ty/ [ae2.l.k.ah0.l.ih1.n.ah0.t.iy0]
alkalinity star_border
/al-ka-lin-i-ty/ [ae2.l.k.ah0.l.ih1.n.ah0.t.iy0]
Acidity is the level of acid in substances. Likewise, alkalinity is the level of alkali in substances. You can ‘increase/decrease the acidity/alkalinity’.
Here are example sentences:
- The pollution produced by carbon dioxide increases the acidity of the oceans and affects the marine food chain.
- We can decrease the alkalinity by adding more acidic chemicals.
Can you define this word? /alu-mini-um/ [ah0.l.uw1.m.ih0.n.ah0.m]
aluminium star_border
/alu-mini-um/ [ah0.l.uw1.m.ih0.n.ah0.m]
Definition: The chemical element of atomic number 13, a light silvery-grey metal.
Example sentences:
- Officials said materials made of plastic, aluminum, glass and metals will have to be recycled.
Can you define this word? /atom/ [anical..ae2.n.ah0.t.aa1.m.ih0.k.ah0.l]
atom star_border
/atom/ [anical..ae2.n.ah0.t.aa1.m.ih0.k.ah0.l]
An atom is the smallest amount of a substance that can take part in a chemical reaction.
Can you define this word? /car-bon diox-ide/ [no ipa available]
carbon dioxide star_border
/car-bon diox-ide/ [no ipa available]
Definition: CO2
Example senences:
- Plants give out oxygen and animals expel carbon dioxide and methane.
Can you define this word? /car-bon-ate/ [k.aa1.r.b.ah0.n.ey2.t]
carbonate star_border
/car-bon-ate/ [k.aa1.r.b.ah0.n.ey2.t]
Definition: A salt of the anion CO32-, typically formed by reaction of carbon dioxide with bases.
Example sentences:
- The reaction with carbonates gives the nitrate salt, water, and carbon dioxide. In natural water systems, many common minerals are formed by anion substitution-precipitation reactions, among them carbonates, phosphates, and the sulfate-containing rocks.
Can you define this word? /cat-a-lyst/ [k.ae1.t.ah0.l.ih2.s.t]
catalyst star_border
/cat-a-lyst/ [k.ae1.t.ah0.l.ih2.s.t]
Definition: A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
Example senences:
- Chlorine acts as a catalyst promoting the breakdown of ozone
Can you define this word? /com-pound/ [k.aa1.m.p.aw0.n.d]
compound star_border
/com-pound/ [k.aa1.m.p.aw0.n.d]
Definition: A thing that is composed of two or more separate elements; a mixture;A substance formed from two or more elements chemically united in fixed proportions
Example sentences:
- The air smelled like a compound of diesel and petrol fumes. The layers of plants and animals slowly broke down into simple substances called hydrocarbons, compounds of hydrogen and carbon.
Can you define this word? /con-dense/ [k.ah0.n.d.eh1.n.s]
condense star_border
/con-dense/ [k.ah0.n.d.eh1.n.s]
To change from a gaseous state into a liquid state, we can use the verb ‘condense’. Here are example sentences:
- The cooler temperatures cause the gas to condense into a liquid.
- The steam from the shower condenses quickly when it hits the cool window.
Can you define this word? /cor-ro-sion/ [k.er0.ow1.zh.ah0.n]
corrosion star_border
/cor-ro-sion/ [k.er0.ow1.zh.ah0.n]
Definition: The process of corroding or being corroded
Example senences:
- This is because the iron electrode is more susceptible to corrosion and to self-discharge on standing.
Can you define this word? /cor-ro-sive/ [k.er0.ow1.s.ih0.v]
corrosive star_border
/cor-ro-sive/ [k.er0.ow1.s.ih0.v]
Stronger acids with a lower ph values are corrosive. This means they can attack metals and destroy skin if spilled.
Can you define this word? /dis-solve/ [d.ih0.z.aa1.l.v]
dissolve star_border
/dis-solve/ [d.ih0.z.aa1.l.v]
When a substance dissolves, it means it disappears - it mixes with a liquid and becomes part of the liquid. For example:
Sugar dissolves in water.
You can also say “Water dissolves sugar.” So “sugar dissolves in water” or “water dissolves sugar.”
Can you define this word? /duc-tile/ [d.ah1.k.t.ah0.l]
ductile star_border
/duc-tile/ [d.ah1.k.t.ah0.l]
A metal that is ductile is able to be deformed without losing toughness. An example in a sentence:
- Unlike brittle elements such as sulfur, metal is highly ductile.
Can you define this word? /evap-o-rate/ [ih0.v.ae1.p.er0.ey2.t]
evaporate star_border
/evap-o-rate/ [ih0.v.ae1.p.er0.ey2.t]
To change from a liquid state into a gaseous state, we can use the verb ‘evaporate’. ‘Evaporate’ is an intransitive verb as well. For example:
- The warmer temperatures cause the liquid to evaporate into a gas.
- Water evaporates rapidly in hot weather.
Can you define this word? /evap-o-ra-tive/ [no ipa available]
evaporative star_border
/evap-o-ra-tive/ [no ipa available]
Definition: Relating to or involving evaporation
Example sentences:
- In the early 19th century, other methods of cooling were explored, and several evaporative refrigerators were patented, although it was another half-century before they made an impact on the food industry.
Can you define this word? /flam-ma-ble/ [f.l.ae1.m.ah0.b.ah0.l]
flammable star_border
/flam-ma-ble/ [f.l.ae1.m.ah0.b.ah0.l]
Definition: Easily set on fire
Example sentences:
- Kerosene is volatile, flammable and leaks very easily from containers.
Can you define this word? /gaseous/ [g.ae1.s.iy0.ah0.s]
gaseous star_border
/gaseous/ [g.ae1.s.iy0.ah0.s]
Definition: Relating to or having the characteristics of a gas
Example sentences:
- gaseous emissions from motor vehicles.
Can you define this word? /gasi-fi-ca-tion/ [g.ae2.s.ah0.f.ah0.k.ey1.sh.ah0.n]
gasification star_border
/gasi-fi-ca-tion/ [g.ae2.s.ah0.f.ah0.k.ey1.sh.ah0.n]
Definition: Convert (a solid or liquid, especially coal) into gas:
Example sentences:
- The plans, which will be carried out over a 20 year horizon, will include energy recovery techniques such as incineration and gasification
Can you define this word? /gasi-fy/ [g.ae2.s.ah0.f.ay2]
gasify star_border
/gasi-fy/ [g.ae2.s.ah0.f.ay2]
Definition: Convert (a solid or liquid, especially coal) into gas
Example sentences:
- Coal, too, could be made carbon-free, using advanced power plants that gasify the fuel and then generate power while stripping away the carbon for sequestration underground.
Can you define this word? /hy-dro-gen/ [hh.ay1.d.r.ah0.jh.ah0.n]
hydrogen star_border
/hy-dro-gen/ [hh.ay1.d.r.ah0.jh.ah0.n]
Definition: A colourless, odourless, highly flammable gas, the chemical element of atomic number 1.
Example sentences:
- We know that the Moon is low on certain chemicals such as hydrogen and carbon
Can you define this word? /im-pu-ri-ty/ [ih2.m.p.y.uh1.r.ah0.t.iy0]
impurity star_border
/im-pu-ri-ty/ [ih2.m.p.y.uh1.r.ah0.t.iy0]
Definition: A constituent which impairs the purity of something
Example sentences:
- The impurities dissolve in lead and evaporate leaving behind silver and gold. Aluminium and lead are impurities frequently found in tap water.
Can you define this word? /mal-leable/ [m.ae1.l.iy0.ah0.b.ah0.l]
malleable star_border
/mal-leable/ [m.ae1.l.iy0.ah0.b.ah0.l]
A substance that is malleable is soft and can easily be made into different shapes. An example in sentence:
- Silver is the most malleable of all metals.
Can you define this word? /methane/ [m.eh1.th.ey2.n]
methane star_border
/methane/ [m.eh1.th.ey2.n]
Definition: Chemical formula: CH4
Example sentences:
- Trace gases include methane, nitrous oxide, carbon monoxide, sulphur dioxide, and ozone
Can you define this word? /mi-cro-scope/ [m.ay1.k.r.ah0.s.k.ow2.p]
microscope star_border
/mi-cro-scope/ [m.ay1.k.r.ah0.s.k.ow2.p]
A microscope is a scientific instrument which makes very small objects look bigger so that more detail can be seen.
Can you define this word? /mol-e-c-u-lar/ [m.ah0.l.eh1.k.y.ah0.l.er0]
molecular star_border
/mol-e-c-u-lar/ [m.ah0.l.eh1.k.y.ah0.l.er0]
Definition: Relating to or consisting of molecules
Example sentences:
- Fire is actually a dancing plasma of molecules and molecular fragments, excited into a glowing state by heat.
Can you define this word? /mol-e-cule/ [m.aa1.l.ah0.k.y.uw2.l]
molecule star_border
/mol-e-cule/ [m.aa1.l.ah0.k.y.uw2.l]
A molecule is the smallest amount of a chemical substance which can exist by itself.
Can you define this word? /neu-tral-i-ty/ [n.uw0.t.r.ae1.l.ah0.t.iy0]
neutrality star_border
/neu-tral-i-ty/ [n.uw0.t.r.ae1.l.ah0.t.iy0]
Definition: The condition of being chemically or electrically neutral
Example sentences:
- A sodium ion was introduced into the system to reach overall electrical neutrality.
Can you define this word? /neu-tral-ized/ [n.uw1.t.r.ah0.l.ay2.z.d]
neutralized star_border
/neu-tral-ized/ [n.uw1.t.r.ah0.l.ay2.z.d]
Definition: Make (an acidic or alkaline substance) chemically neutral:
Example sentences:
- Baking soda, a gentle alkaline powder, neutralizes odor-causing acids by restoring your skin's natural pH level.
Can you define this word? /neu-tron/ [n.uw1.t.r.aa2.n]
neutron star_border
/neu-tron/ [n.uw1.t.r.aa2.n]
A neutron is an atomic particle that has no electrical charg
Can you define this word? /ni-tro-gen/ [n.ay1.t.r.ah0.jh.ah0.n]
nitrogen star_border
/ni-tro-gen/ [n.ay1.t.r.ah0.jh.ah0.n]
Definition: The chemical element of atomic number 7, a colourless, odourless unreactive gas that forms about 78 per cent of the earth’s atmosphere
Example sentences:
- The data demonstrate that nitrogen and phosphorus are in especially short supply.
Can you define this word? /nu-cle-us/ [n.uw1.k.l.iy0.ah0.s]
nucleus star_border
/nu-cle-us/ [n.uw1.k.l.iy0.ah0.s]
The nucleus of an atom or cell is the central part of it.
Can you define this word? /odors/ [ow1.d.er0.z]
odors star_border
/odors/ [ow1.d.er0.z]
Definition: A distinctive smell, especially an unpleasant one
Example sentences:
- During that time, the officer had smelled the odour of alcohol on the accused's breath.
Can you define this word? /pe-ri-od-ic ta-ble/ [no ipa available]
periodic table star_border
/pe-ri-od-ic ta-ble/ [no ipa available]
Definition: A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Example sentences:
- When you move down the periodic table, as the atomic numbers increase, the elements become rarer
Can you define this word? /pro-ton/ [p.r.ow1.t.aa2.n]
proton star_border
/pro-ton/ [p.r.ow1.t.aa2.n]
A proton is an atomic particle that has a positive electrical charge.
Can you define this word? /re-ac-tion/ [r.iy0.ae1.k.sh.ah0.n]
reaction star_border
/re-ac-tion/ [r.iy0.ae1.k.sh.ah0.n]
Definition: a reply; a change that occurs when substances are mixed
Example sentences:
- Scientists explore the origins of energy in chemical reactions using experimental quantum chemistry.
- Reactions in solids tend to be much more complex than those in liquids, where molecules quickly diffuse into a uniform mixture.
Can you define this word? /re-fine/ [r.ah0.f.ay1.n]
refine star_border
/re-fine/ [r.ah0.f.ay1.n]
Definition: Remove impurities or unwanted elements from (a substance), typically as part of an industrial process
Example sentences:
- Sugar was refined by boiling it in huge iron vats.
- When oil is refined this reaction is used to remove unwanted alkenes.
Can you define this word? /sat-u-rate/ [s.ae1.ch.er0.ey2.t]
saturate star_border
/sat-u-rate/ [s.ae1.ch.er0.ey2.t]
Definition: Cause (something) to become thoroughly soaked with liquid so that no more can be absorbed:
Example sentences:
- The soil is saturated
Can you define this word? /sol-u-bil-i-ty/ [no ipa available]
solubility star_border
/sol-u-bil-i-ty/ [no ipa available]
We can use the noun solubility to describe the character of a substance as being soluble. So in your the listening part you may hear a sentence like this:
One characteristic of sugar is its solubility in water.
Note: The solubility of a substance can be high or low, or in some cases even infinite. Most substances, however, have a maximum solubility.
Can you define this word? /sol-u-ble/ [s.aa1.l.y.ah0.b.ah0.l]
soluble star_border
/sol-u-ble/ [s.aa1.l.y.ah0.b.ah0.l]
If we want to use an adjective to describe a substance that can dissolve, we use the adjective ‘soluble’. Likewise, to describe a substance that cannot dissolve, we use the adjective ‘insoluble’. Here are example sentences:
- Salt is soluble in water = Salt can dissolve in water.
- Sand is insoluble in water = Sand cannot dissolve in water
Can you define this word? /solute/ [no ipa available]
solute star_border
/solute/ [no ipa available]
When a substance dissolves in a liquid, we say that the substance is a solute, and the liquid is a solvent. The mixture of the solvent and the solute is called a solution.
Can you define this word? /sol-vent/ [s.aa1.l.v.ah0.n.t]
solvent star_border
/sol-vent/ [s.aa1.l.v.ah0.n.t]
When a substance dissolves in a liquid, we say that the substance is a solute, and the liquid is a solvent. The mixture of the solvent and the solute is called a solution.
Can you define this word? /sub-li-mate/ [no ipa available]
sublimate star_border
/sub-li-mate/ [no ipa available]
To change from a solid state into a gaseous state, we can use the verb “sublimate”. Sublimating is the process of sublimating. For example:
- Ice can sublimate at temperatures below freezing.
- During sublimation, solids are transformed directly to vapor without passing through a liquid stage.
Can you define this word? /sub-li-ma-tion/ [no ipa available]
sublimation star_border
/sub-li-ma-tion/ [no ipa available]
To change from a solid state into a gaseous state, we can use the verb “sublimate”. Sublimating is the process of sublimating. For example:
- Ice can sublimate at temperatures below freezing.
- During sublimation, solids are transformed directly to vapor without passing through a liquid stage.
Can you define this word? /sul-fur diox-ide/ [no ipa available]
sulfur dioxide star_border
/sul-fur diox-ide/ [no ipa available]
Definition: A colourless pungent toxic gas formed by burning sulphur in air.
Example sentences:
- When fossil fuels burn, carbon dioxide, sulfur dioxide, nitrogen oxides, sooty particles, dioxins, and other pollutants are released into the air and water.
Can you define this word? /sul-fu-ric/ [s.ah0.l.f.y.uh1.r.ih0.k]
sulfuric star_border
/sul-fu-ric/ [s.ah0.l.f.y.uh1.r.ih0.k]
Definition: Containing sulphur or sulphuric acid
Example sentences:
- the sulphuric by-products of wood fires.
Can you define this word? /syn-the-sis/ [s.ih1.n.th.ah0.s.ah0.s]
synthesis star_border
/syn-the-sis/ [s.ih1.n.th.ah0.s.ah0.s]
Definition: the combination of ideas into a complex whole
Example sentences:
- Blacks and other minorities have higher concentrations of melanin, which makes their skin darker, but this inhibits synthesis of vitamin D, the researchers explained.
- Now, biologists know that RNAs serve many other essential functions: they help with protein synthesis, control gene activity and modify other RNAs.
Can you define this word? /syn-thet-ic/ [s.ih0.n.th.eh1.t.ih0.k]
synthetic star_border
/syn-thet-ic/ [s.ih0.n.th.eh1.t.ih0.k]
Definition: (Of a substance) made by chemical synthesis, especially to imitate a natural product
Example senences:
- Mixtures of several synthetic dyes, or mixtures of natural and synthetic dyes, could produce more subdued colors.
Can you define this word? /ura-ni-um/ [y.er0.ey1.n.iy0.ah0.m]
uranium star_border
/ura-ni-um/ [y.er0.ey1.n.iy0.ah0.m]
Definition: The chemical element of atomic number 92, a gray, dense radioactive metal used as a fuel in nuclear reactors. (Symbol: U)
Example sentences:
- It is not certain if the effects are due to the chemical or the radioactive properties of uranium.
Can you define this word? /va-por/ [v.ey1.p.er0]
vapor star_border
/va-por/ [v.ey1.p.er0]
When a liquid like water becomes a visible, gas-like substance floating in the air, it's a vapor. Examples of vapor are fog and mist.
Can you define this word? /va-por-ize/ [v.ey1.p.er0.ay2.z]
vaporize star_border
/va-por-ize/ [v.ey1.p.er0.ay2.z]
The verb ‘vaporize ’means to change into vapor or to cause something to change into vapor. For example:
- Boiling water vaporizes and rises into the atmosphere.
- Heat is used to vaporize a liquid.
Can you define this word? /volatile/ [v.aa1.l.ah0.t.ah0.l]
volatile star_border
/volatile/ [v.aa1.l.ah0.t.ah0.l]
Definition: (Of a substance) easily evaporated at normal temperatures
Example senences:
- Even small amounts of gasoline or other volatile fuels or solvents mixed with kerosene can substantially increase the risk of a fire or an explosion.
Words Mastered
solution
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absorption
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acid
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acidic
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acidity
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alchemy
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alkali
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alkaline
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alkalinity
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aluminium
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atom
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carbon-dioxide
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carbonate
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catalyst
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compound
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condense
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corrosion
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corrosive
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dissolve
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ductile
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evaporate
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evaporative
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flammable
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gaseous
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gasification
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gasify
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hydrogen
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impurity
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malleable
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methane
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microscope
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molecular
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molecule
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neutrality
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neutralized
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neutron
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nitrogen
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nucleus
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odors
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periodic-table
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proton
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reaction
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refine
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saturate
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solubility
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soluble
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solute
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solvent
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sublimate
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sublimation
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sulfur-dioxide
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sulfuric
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synthesis
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synthetic
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uranium
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vapor
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vaporize
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volatile
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