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Science All Around You
"You don't need a laboratory or equipment to see some curious things going on all around you! Try this quiz on the science behind everyday things."
15 Points Per Correct Answer - No time limit
Why is it easy to lose cell phone reception when traveling over a hill or down a valley, but the radio keeps playing without interruption?
Cell phones use longer wavelengths than radio
Cell phones are newer technology and the quality hasn't caught up
Cell phones are smaller than radios
Cell phones use shorter wavelengths than radio
Vacuum power. It is easy to suck water up a six-inch long straw... but what if it were longer? With very long, strong straws available to you, what is the highest you could suck up some water?
About 34 feet
About 7 feet
Limited only by lung power
About 17 feet
Two spoons, one made out of metal and one out of wood have sat side by side in your kitchen drawer for days. But if you pick up the metal one it feels cold compared to the wooden one. Why?
The metal one stays cold
Your skin is fooling you
The metal one is heavier
Weak electricity is flowing to your hand from metal one
Someone tells you that water swirls counter-clockwise going down the drain if you live in the northern hemisphere, and clockwise if you live in the southern hemisphere. Are they right?
No, because it's the opposite - water always goes down clockwise in the north and counter-clockwise in the south
Yes, water drains that way, but the north/south difference is due to cultural practices in plumbing setup
Yes, it's an example of the coriolis force in action
No, in real life the earth's spin won't affect the rotation of water going down a drain
You fill a glass half-full with ice cubes and then add water so that it is nearly full and the cubes are floating. Next you mark that water line with a pen and wait for the ice to melt. Where is the new water line compared to your mark?
sitting above your line
sitting at the line you marked
sitting below your line
it's random - could be above or below your line
If you snoop around the back, sides or bottom of your running refrigerator you will always find some hot area. Older models had a set of coils on the back that would get hot; current models have them on the underside or other hidden areas. Why do refrigerators have coils that get hot?
Heat transfers from the food-compartment into the coils, making them hot
The coils cool the motor that runs the refrigerator
Refrigerators use a lot of electricity, which runs through the coils and makes them hot
The coils are heated as part of the automatic-defrost cycle
Why are sunsets red?
Red light is reflected by water vapor in the atmosphere
Red light can curl around the earth as it turns
Red light makes it through the atmosphere better than blue
Red light isn't pulled down by gravity as much
How do rockets fly? Which analogy below is best to explain how a rocket works? [Don't try these at home though!]
You set off a firecracker in a totally sealed container
You sit on a chair, on an ice rink, and throw basketballs out in front of you
You jump off a ladder onto a trampoline
You grab a high voltage line with your bare hands
Visiting your aunt in the country, she asks you to take the clothes down off of her old-fashioned clothes line. Looking at this sagging piece of cord hanging between two poles, you recognize it's shape as a...
Someone tells you that if you want ice cubes faster, use hot water from the tap rather than cold. Are they right? Does hot water freeze faster than cold water?
Yes, hot water always freezes faster than cold water
Hot water can freeze faster under certain conditions
No, it's a silly myth - water has to cool to 0C to freeze, and cold water has a head start
It depends on whether you live north or south of the equator
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Compiled May 19 13