https://padlet.com/13acrosbie_occ/vqnqkt4b81ff Science Topics Leraned en-us 2016-11-29 11:23:44 UTC 2023-02-18 18:04:30 UTC hello@padlet.com 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140453511 This process is called mechanical adhesion. So why doesn't white glue stick to the inside of the bottle? When white glue is inside a bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle protects the glue from the air and keeps the glue runny.]]> 2016-11-29 11:29:02 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140453511 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140454666 The Columbia Space shuttle disaster occurred on February 1st 2003 when Columbia disintegrated over Texas and Louisiana as it re-entered the Earth's atmosphere at a speed of 24.1 Mach (25594.2 Km/h)

]]> 2016-11-29 11:35:35 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140454666 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140459687 2016-11-29 12:04:52 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140459687 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140462007 Theaurora borealis (northern lights) form when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. These collisions result in countless little bursts of light, called photons, which make up the aurora.]]> 2016-11-29 12:19:18 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140462007 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140464643 2016-11-29 12:32:42 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/140464643 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141381668 Snow is formed when temperatures are low and there is moisture - in the form of tiny ice crystals - in the atmosphere. When these tiny ice crystals collide they stick together in clouds to become snowflakes. If enough ice crystals stick together, they'll become heavy enough to fall to the ground]]> 2016-12-02 14:17:39 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141381668 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141384922 Since oil is a lipid, it does not freeze in the typical way freezing usually occurs, according to scientists at the University of Illinois. Lipids do not freeze, but the molecular movement slows down at colder temperatures.]]> 2016-12-02 14:25:54 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141384922 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141387754 When learning about speed, distance and time we used map my run to track how far and how fast I was travelling. This helped me to learn how to calculate and find out my average speed]]> 2016-12-02 14:33:19 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141387754 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141391387 The exact reason for Deja Vu is unknown but there are many different theories.  The 3 main theories are explained in this video and are involved with Duel processing,a malfunction in The nervous system and a false sense of familiarity because some elements are familiar and you just haven't realised it]]> 2016-12-02 14:42:43 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141391387 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141395782 Blood in your veins has very little oxygen and is a dark red color that looks almost blue when covered by your skin. ]]> 2016-12-02 14:53:22 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141395782 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141410299 If the gunpowder is confined in some way, the gas is not released harmlessly. Instead, it explodes in firecrackers or other fireworks the cardboard shell of the firecracker explodes with a loud popping sound when the chemical burning reaction releases the gas.]]> 2016-12-02 15:31:52 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141410299 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141622075  When heated, the atoms of each element in the mix absorb energy, causing its electrons to rearrange from their lowest energy state to a higher "excited" state. As the electrons plummet back down to their lower energy state, the excess energy gets emitted as light.]]> 2016-12-04 20:45:03 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141622075 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141737925 Acids neutralize bases in a neutralization reaction. An acid and a base combine to make a salt and water. The PH scale is used to measure how strong or weak an acid or a base is]]> 2016-12-05 14:14:41 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141737925 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141740629 A catalyst is a substance that speeds up or slows down a reaction without altering the reaction]]> 2016-12-05 14:21:27 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141740629 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141744126 A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.]]> 2016-12-05 14:28:43 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141744126 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141745519 Yellow or green mucus is a clear sign that you have an infection, but despite that common misperception, the yellow or green hue isn't due to bacteria. When you have a cold, your immune system sends white blood cells called neutrophils rushing to the area.]]> 2016-12-05 14:32:01 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141745519 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141747834 Thunder is caused by lightning. When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel. Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder.]]> 2016-12-05 14:37:27 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141747834 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141751929 Water can actually do three things with fire:  Feed it, not affect it, or quench it, depending on the fuel.
For burning solids, such as paper, wood, or coal, water will extinguish the fire.

For burning liquids, such as gasoline, kerosine, cooking oil water will not help because the liquids are less dense than water and will simply float on top.

Burning metals are very different.The most familiar example of a burning metal is elemental magnesium.  When you try to put out a magnesium fire with water, the magnesium will react with the water to produce hydrogen and the hydrogen will then ignite.]]> 2016-12-05 14:46:23 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141751929 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141757252 This is caused by the aero dynamics of the wind hitting the car. As the car drives through the rain the that pushes against the car causes the rain to travel in the same direction as the wind]]> 2016-12-05 14:58:47 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141757252 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141972312 2016-12-06 11:32:19 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141972312 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141973573 Titration is used to determine the unknown concentration of a known substance.
Apparatus Needed:

1. Retort stand 
2. White tile
3. Burette
4. Pipette
5. Pipette filler
6. Funnel
7. Wash Bottle
8. Conical flask
9. 3 Beakers
10. Dropper

]]> 2016-12-06 11:42:26 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141973573 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141976343 Chemicals Needed:

1. NaOH (Concentration: 0.1M)
2. HCl solution A (Concentration: Unknown)
3. HCl solution B (Concentration: Unknown)
4. Phenolphthalein Indicator
5. Deionised Water

Procedure:

1. Set up apparatus as shown.
2. Add a few drops of phenolphthalein indicator to the NaOH in the conical flask. (Note colour)
3. Allow the HCl to flow from the burette into the NaOH in the conical flask.
4. Add the HCl drop by drop until the solution in the conical flask changes colour. (Note colour)

]]> 2016-12-06 12:02:37 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141976343 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141978999 When studying speed, distance and time I learned about an easy way to calculate your speed, distance and time. This method is commonly referred to as Daddy's Silly Triangle. This method is very useful and can help you to remember what to do.]]> 2016-12-06 12:20:05 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141978999 13acrosbie_occ https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141980857 When warm air rises, it expands and cools. Cool air can't hold as much water vapor as warm air, so some of the vapor condenses onto tiny pieces of dust that are floating in the air and forms a tiny droplet around each dust particle. When billions of these droplets come together they become a visible cloud.]]> 2016-12-06 12:32:57 UTC https://padlet.com/13acrosbie_occ/vqnqkt4b81ff/wish/141980857