Physics
Below are our 15 articles in the physics' category:
Sir Isaac Newton was born in 1643 and died in 1727. He was a physicist, mathematician, astronomer, biologist and chemist. Newton developed three...
As light passes through transparent objects, it bends. This can create optical illusions like disappearing bowls, bending pencils and mirages. This...
Heat travels in three different ways – conduction (heat travelling through a solid), convection (heat travelling through liquids and gases) and...
Density describes how much something weighs relating to its size, and explains why some things float on water and some sink - if something is less...
Friction is the force that acts between two moving surfaces and tries to stop them moving. Friction can be between two solids, a solid and a...
Stalactites and stalagmites are formations of rock in underground caves. They are formed when calcium carbonate and other minerals dissolve in water...
Heat travels through solids by conduction (see also ‘Detecting Fake Silver: Conductivity of Metal’). Insulation can keep things warm and keep...
Magnets are attracted to some metals, and can attract and repel each other. The earth has a magnetic field, and so magnets can be used to find...
Ultraviolet (UV) light is an invisible part of light. It has a shorter wavelength than violet light, and its name means ‘beyond violet’. Ultraviolet...
Water exists in three states – solid ice, liquid water and gaseous steam. Solids have a fixed shape and size. Liquids can change in shape, but have...
Atoms contain electrons, which have a negative charge. Some electrons are fixed onto the atoms quite loosely, and can transfer from one surface to...
Water molecules at the surface of a glass of water are more strongly attracted to each other than to water molecules in the rest of the water. This...
Sounds are created from vibrations, whether it’s a tuning fork, the reed of a musical instrument, or sound coming from someone’s voice box.
The...
As air gets warm, the air molecules have more energy and move around more, taking up more space. As the warm air expands, it becomes less dense...
Hot water has more energy than cold water. This makes the water molecules move around more. Molecules that move more take up more space, but still...
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