friction

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18 08, 2017

Meteors – Shooting stars – Astronomy

By |2018-05-31T11:49:25-07:00August 18th, 2017|History|0 Comments

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 [...]

18 08, 2017

What is inertia? Physics – Science

By |2019-09-17T10:49:34-07:00August 18th, 2017|Physics|2 Comments

The bus is heavy, so it's hard to get it moving. Who first wrote about inertia? 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. [...]

18 08, 2017

What is gravity? Physics

By |2019-03-01T04:44:58-07:00August 18th, 2017|Physics|0 Comments

What is gravity? The Moon orbiting Earth (taken from space) - NASA What does gravity do? Gravity attracts all objects towards each other. Gravity has been around since the very beginning of the universe, and it works the same way everywhere in the universe, on all kinds of different objects, of all different sizes [...]

17 08, 2017

Newton’s First Law of Motion – Physics

By |2018-05-31T11:49:24-07:00August 17th, 2017|Islam, Physics|0 Comments

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 [...]

16 08, 2017

What is friction? Definition of friction

By |2019-06-17T15:26:30-07:00August 16th, 2017|Physics|0 Comments

Definition of friction: Hands rubbing together is a kind of friction Definition 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. A friction project Friction and food coloring Definition of inertia All our physics articles More examples [...]

16 08, 2017

Friction project – Physics experiments

By |2019-06-17T20:25:56-07:00August 16th, 2017|Physics|0 Comments

Friction project: How much friction do you think a scrubbing brush will get you? Make some friction predictions Which things have more friction? Try to predict which things will be harder to push. Write down your predictions, and then measure this and see for yourself whether your predictions are true. What is friction? [...]

16 08, 2017

What is a photon? Physics of light

By |2019-10-15T10:22:01-07:00August 16th, 2017|Physics|10 Comments

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 Big Bang? What are [...]

2 06, 2017

What is heat? Simple science – Chemistry

By |2019-08-06T22:18:09-07:00June 2nd, 2017|Chemistry, Physics|1 Comment

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. So they end [...]

1 06, 2017

Friction and food coloring – Heat project

By |2019-06-23T22:25:36-07:00June 1st, 2017|Chemistry|0 Comments

Children playing a running game: a heat project Friction makes things hot 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 [...]