Word library

The natural process in which an unstable atomic nucleus loses energy by releasing radiation, gradually turning into a different, more stable element.

A version of an element whose nucleus is unstable and breaks down over time, releasing radiation.

A scientific method for estimating the age of organic material by measuring the decay of a radioactive form of carbon it contains.

A small, round or oblong root vegetable with a peppery taste, usually eaten raw.

The distance from the center of a circle to any point on its edge.

A piece of old, often torn cloth, usually used for cleaning.

A track that trains run on, or the system of transport that uses it.

Water that falls from clouds in drops.

A dry area on the side of a mountain range facing away from the prevailing wind, where little rain falls.

An arc of colours that appears in the sky when sunlight passes through rain.

A coat made from waterproof material, worn to stay dry in the rain.

The amount of rain that falls in a particular place over a period of time.

A thick forest found in warm, wet regions, home to a huge variety of plants and animals.

Describing weather with a lot of rain.

To lift something up, or to increase an amount.

To gather or smooth something, such as leaves or soil, using a tool with long teeth.

A consequence or result of an action, especially one that is complicated or not immediately obvious.

A defensive wall or embankment, often surrounding a fort or city, built to protect against attack.

Having a strong, unpleasant smell or taste, especially describing fat or oil that has gone bad.

Deep, long-lasting bitterness or resentment toward someone.

Happening or chosen without any particular pattern, method, or reason.

A small, unpredictable variation in a measurement caused by factors that fluctuate from one reading to the next.

The difference between the highest and lowest values in a set of data.

A person's official level or position within an organized group, especially the military or a system with grades.

To search through a place roughly, often stealing or damaging things in the process.

Happening or moving very quickly.

Not happening or found very often.

Not often.

An area of red, irritated skin, often caused by an allergy or illness.

A small, red, bumpy fruit that grows in clusters on a thorny bush.

A measure of something in relation to another quantity, or a fixed price or charge.

A measure of how quickly reactants are converted into products during a chemical reaction.

To some degree; somewhat, or used to express preference.

A way of comparing two amounts, showing how many times one contains the other.

A fixed amount of something, especially food, allowed to each person during a shortage.

Based on clear thinking and reason rather than emotion.

The act of inventing a logical-sounding reason to explain a decision or behavior that was really driven by something else.

To find a logical-sounding explanation for behavior or feelings that were actually driven by something else.

To invent a reasonable-sounding explanation for behavior or a decision, often to avoid admitting the real, less flattering reason.

Loud, harsh, and disorderly.

A large, glossy black bird known for its deep call and intelligence.

Not cooked, or in a natural, unprocessed state, or, of emotion, intense and unfiltered.

A narrow beam of light or energy coming from a source.

To completely destroy a building or town, usually by knocking it down.

The process by which useful substances filtered out of the blood are taken back into it, especially in the kidney.

To stretch out a hand to touch or get something, or to arrive at a place.

To behave, speak, or change in response to something that happens.

A substance that takes part in and is changed by a chemical reaction.