One of the three classical states of matter, along with gas and solid.
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A measurement related to the average kinetic energy of the particles contained in a system.
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The state of matter in which particles are packed tightly together in a rigid structure, with a defined shape.
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A set of well-defined lines within the electromagnetic spectrum, emitted by hot or excited matter.
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Any substance that has mass and occupies a volume.
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The temperature at which a liquid changes to a gas, at atmospheric pressure.
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A positively charged particle found in the nucleus of all atoms.
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A colourless and odorless gas that belongs to the alkane group of hydrocarbons.
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A measure of how much matter an object contains, in units of grams or kilograms.
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Matter in which something happens, is transmitted, or is stored.
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Though often used more narrowly to refer to ionising radiation, the term radiation refers to any form of energy that travels through a medium, radiating outwards from a source.
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Used as a general term for the atoms and molecules that make up all matter.
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A collection of billions of stars, along with gas and dust, held together by its own gravity.
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The most widely accepted theory for the origin and development of our Universe.
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An attractive force that acts between all matter that has mass, and is proportional to mass.
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The uppermost 5 to 20cm of soil, with a high concentration of organic matter and microorganisms, where almost all of the biological activity in soil takes place.
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The transfer of heat energy due to a difference in temperature, always from a hotter to cooler area.
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A fundamental property of matter that means all particles are either positive, negative, or neutral.
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Very simple organisms that can photosynthesise like plants, but do not have complex features such as roots, stems, or leaves.
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The average mass of atoms of an element.
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The transfer of thermal energy.
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How French Chemist Antoine Lavoisier revealed the true significance of oxygen and brought about the birth of modern chemistry. Chemistry - Periodic Table - Learning Points. Antoine Lavoisier experimented with weighing substances before...

Discover one theory about a single event over 13.8 billion years ago, that might have created our Universe.



Physics - Universe - Learni

ng Points.

The Big Bang took place over 13.



8 billion years...

The story of Hennig Brand and how he discovered the element phosphorus by boiling buckets of urine. Discover why his experiments paved the way for the discovery of the modern chemical elements. Chemistry - Periodic Table - Learning...