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Meteors – Shooting stars – Astronomy

By |2018-05-31T11:49:25+00:00August 18th, 2017|History|

Lyrid meteor shower Meteors or meteorites are bits of rock (like granite) and ice - usually a mixture of rock and iron and nickel but sometimes just rock or just iron - from out in space that get sucked into the gravity of the Earth and fall through our atmosphere to the ground. Usually this is because a comet has passed close enough to the Earth for [...]

What is inertia? Physics – Science

By |2018-05-31T11:49:29+00:00August 18th, 2017|Physics|

The bus is heavy, so it's hard to get it moving. A law of physics first suggested by the Uzbek scientist Ibn Sina about 1000 AD states that "an object at rest tends to remain at rest, and an object in motion tends to remain in motion." Scientists call these tendencies inertia. Inertia is a way of measuring [...]

Newton’s First Law of Motion – Physics

By |2018-05-31T11:49:24+00:00August 17th, 2017|Islam, Physics|

Isaac Newton, mathematician and physicist About 1000 AD, in the Islamic Empire, Ibn Sina came up with the idea that an object moving in a vacuum would just keep moving forever without slowing down. But to prove this was always true, you'd need calculus, which hadn't been invented yet. In the 1700s, Isaac Newton figured out [...]

What is friction? Physics definitions

By |2018-05-31T11:49:28+00:00August 16th, 2017|Physics|

Hands rubbing together is a kind of friction Friction is what happens when any two things rub against each other. These can be solid things, like your two hands rubbing together, or your skis rubbing on the snow, or a hammer hitting a nail, or they can be gases, like friction with the air slowing down your car, or [...]

Friction project – Physics experiments

By |2018-05-31T11:49:14+00:00August 16th, 2017|Physics|

How much friction do you think a scrubbing brush will get you? Which things have more friction? Try to predict which things will be harder to push, and then measure this and see for yourself whether your predictions are true. Get a plain wooden board and put it on the ground. Put things [...]

What is a photon? Physics of light

By |2018-05-31T11:49:28+00:00August 16th, 2017|Physics|

Photons - Sunshine breaking through the clouds. When did the first photons appear? A photon is a tiny little particle of light, far too small to see individually. All light is made of photons (FOE-tahns). The earliest photons probably appeared about fifteen billion years ago, during the Big Bang. What's the speed of light? Unlike electrons and quarks, [...]

What is heat? Simple science – Chemistry

By |2018-05-08T09:27:54+00:00June 2nd, 2017|Chemistry, Physics|

What is heat? A big campfire throws some serious heat Definition of heat When molecules of any kind of atoms get more energy in them than they had before, they move faster, and we call that "heat". When the molecules move faster, they hit against each other and bounce apart, and so they [...]

Friction and food coloring – Heat experiments – Chemistry

By |2018-04-16T17:38:04+00:00June 1st, 2017|Chemistry|

Children playing a running game You can easily make things hotter than they were before. Start by rubbing your hands together, and you'll see that they feel hot. That's because the energy you used up moving your hands against the friction of them touching each other turns into heat energy. Another way to [...]