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 did Islam begin?
How does a regular lamp (light bulb) work?
What are the common characteristics of primates?
Why do we call money saved for a rainy day a “nest egg”?
Can a pet help me when I am having a bad day?
How can I describe a polymer to a group of 4th grade students?
Why doesn't glass have electrons to carry heat. What is glass made of?
Why do the front brakes of a bike provide more braking power than the rear brakes, assuming both are applied with equal pressure?
Which plants grow in the rain forests?
Why do the British drive on the left side of the road while Americans use the right?
What was unique about the ankylosaurus?
Why is it good to put premium gas in your car during the winter? If premium gas does not burn easily, does it also not freeze easily?
Why, when getting serious, do we say, “Let’s get down to brass tacks”?
How long does a star live?
What are ships used for today?
Why do CD's skip?
When did the first songbirds sing?
Who invented the automobile?
What is a microwave and what does it do?
What happened to the Hubble mirror?
Why do butterflies and other insects fly from flower to flower?
How does a "touch lamp" work?
What is the Bill of Rights?
Do any mammals lay eggs?
Where are flightless birds found?
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Protecting bones Change to brown rice
Calcium requires magnesium as well as vitamin D for maximum absorption. In a study reported in the Journal of the American Geriatrics Society, people over 70 who consumed highest levels of magnesium had greater bone-mineral density than people with the least amount of this mineral. Brown rice contains more than half as much again per serving than white rice. Other good sources include cashew nuts, salmon, soybeans, tofu, and oats.