Do You Know
Questions & Answers on General Knowledge.
Is the earth a huge magnet? If so, how does it do this without being made out of metal?
The earth is a huge magnet and it is made out of metal. The earth's core is mostly iron and nickel, both of which can be magnetic metals. However, the earth's magnetism doesn't appear to come from the metal itself. Current theories attribute the earth's magnetism to movements in and around the core. There are either electric currents associated with this movement or some effects that orient the local magnetization of the metal. I don't think that there is any general consensus on the matter.
When were the first Olympic Games held?
Can one's health be adversely affected by the use of certain wraps, films, or containers, when heating food in the microwave?
Where did the customs of Halloween come from?
Is there life on Mars?
Why do fluorescent emissions of light not produce more heat?
Were they prepared for Europeans?
Why is alcohol bad for your health?
Why can water appear brown, blue (as in the ocean), and clear (as in a glass of water)?
If you reverse one of the batteries in a string, does that reversed battery recharge?
How does a paper airplane fly?
Why are cells called building blocks?
How does a dead ball work?
How do oil spills/spots (i.e. in parking lots and streets) create rainbows?
Why are Native Americans also called American Indians?
What is the difference between a tube amplifier and a solid-state amplifier? Does the human ear prefer one over the other?
Why are BC,AD, BCE, and CE all used to give calendar dates to historic events?
How does a heat-seeking missile and a radar-homing missile work?
Can my cat or dog benefit my health?
Is it true that no two snowflakes are the same?
How do neon lights work?
Why do some microwave ovens not seem to have a metal surface in the cooking area?
Where did croissants, or crescent rolls, originate?
If you stand between the two satellites, would you have light on you?
Why does my cat purr?
What does the heat anticipator do on a furnace thermostat? Does it have anything to do with the dwell (temperature rise) of the unit?
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