How to explain a simple compass to a five year old?

That the kid would understand how it works and maybe be fascinated by the force
thank you for answering :))

Answer: 
I'd do it in the following stages #1 basic introduction to magnets, how they attract metal and have a north and south end. #2 demonstrate how you can magnetize one piece of non-magnetic metal with another. Use a needle. #3 do the old trick of having a magnet under a sheet of paper with iron shavings on it then shake the shavings so they form up and display the magnetic field http://www.cyberphysics.co.uk/graphics/photos/magnet/magnet_filings.jpeg #4 state that the earth has a magnetic field just like that, and that it causes other magnets to align with it. Then put the previously magnetized needle on a cork in water and allow it to turn north.

How to avoid being nervous during the times of tremors pertaining to earthquake disaster?

Today people are not aware of the earthquake, the most unpredictable among the natural phenomenon, what is the safest thing for survival during the earthquake , even though having an earthquake drill this would not guarantee that anybody will have a 100 percent safe.

Answer: 
Linked below is the USGS earthquake preparedness site including information about what you can do to make your home safer and what to do during an earthquake.

How to minimise the negative side effects and their impact on Earth of burning fossil fuels?

Burning fossil fuels contain radioactive materials which are released into the atmosphere. Also, burning fossil fuels generate sulphuric, carbonic and nitric acid which falls on earth as acid rain so how do we minimise this?

Answer: 
switch to renewable resources use less energy when possible walk ride a bike or take public transportation contact your elected officials and try to promote legislation that will minimize the damage of burning fossil fuels

How to test whether the core of another planet is completely solid?

Set off a bomb to create seismic waves. If P waves arrive on the opposite side of the planet, then the core is solid.
Set off a bomb to create seismic waves. If S waves arrive on the opposite side of the planet, then the core is solid.
Set off a bomb to create seismic waves. If R waves arrive on the opposite side of the planet, then the core is solid.
Set off a bomb to create seismic waves. If L waves arrive on the opposite side of the planet, then the core is solid.

Answer: 
Set off a bomb to create seismic waves. If S waves arrive on the opposite side of the planet, then the core is solid. S (shear) waves will not travel through liquid. But there are other easier ways to test whether a planet has a liquid core. For example if the planet has a significant magnetic field, then it must have a liquid core. Mercury for example has a magnetic field and therefore a liquid core - whereas Mars does not have a significant magnetic field and therefore is predicted to be entirely solid. There are also subtle clues in the way a planet rotates - see the links for details.

How to justify earthquakes are better than tornadoes?

Thanks Alex but what I meant was in the US.

Answer: 
Tornadoes occur more frequently than do earthquakes, at least those that cause physical harm to people. Tornadoes are also more unpredictable than earthquakes are. For example, throughout the Midwest each Spring, a number of severe thunderstorms are certain to occur any of which could spawn a tornado or tornadoes. Where and when one might strike is not known. Generally speaking, we expect the majority of earthquakes to be very localized. Most will occur either along the San Andreas fault zone or the Hayward fault zone in California. For years building codes have been strengthen in these areas so that structures could better withstand the force of an earthquake. We don't expect the same damage or loss of life as the 1906 SF quake or the 1971 San Fernando quake. Having experienced a number of earthquakes and tornadoes, I would say I felt more helpless during a tornado than I did during any of the dozen or so earthquakes I felt.

How to drive out the excess heat from the equator?

If giant sunshades were installed on the roofs of every building in the city, would it help to radiate the excess heat back into space to prevent overheating ?

thanks

Please suggest an alternative.....like an atmospheric dehumidifier.

Answer: 
aluminium/titanium shreds/dust in orbit would be the only way -like the rings of saturn but the consequences could be unforeseen

How to find out if there are ore deposits on your property?

I thought it would be kind of cool to try to do some mining, how can I see if I have ore on my property and possibly what kind it is?

Answer: 
Mining huh. You must have a very large piece of property, or a lot of money that you are looking to throw away. By the way, just because you may live above a copper deposit doesn't mean that you have ownership of said copper deposit. Unless mineral rights were conveyed in the purchase of the property there is a very good chance that somebody else owns the subsurface minerals. But to answer you question, I would say the first step is to find a geologist experienced in the search for subsurface minerals and see if they find any potential for there being copper deposits based upon the geologic history of the area.

How to observe waterfall features of erosion and deposition?

Its a geography investigation and am really stuck, thanks . The aim of the investigation is to observe features of erosion transporation and deposition that may have been responsable for the development of a waterfall. My geography teacher wont help me !!!

Answer: 
You should begin with charting the carbon based constiuents of the primary limestone that you are observing. Biological weathering is a process of rock and mineral disintegration caused by physical and chemical agents of living organisms. Whether weathering is caused by bacteria or a plant or an animal, it may have both physical and chemical effects on the surface. These effects include breaking of particles, movement and mixing of materials, production of carbon dioxide by breathing and a biological process of chelation (production of organic substances). Organisms also have an effect on the pH of the soil. Recognize any levels of patena growth. These organisms will utilize the process of chelation. Calculate the Limestone Chemical Composition The chemical composition of the different varieties is almost the same, and it may therefore be given at once for the whole. The following is the analysis made by Professors Daniel and Wheatstone for the commissioners who selected the stone for the Houses of Parliament: - Silica ...... 1.20 Carbonate of lime .... 9516 Carbonate of magnesia .... 120 Iron and alumina .... 0.50 Water and loss ..... 1.94 Bitumen ..... A trace. These rates should be in your text book or in a handout. Look through your notes. Given this information you should be able to complete your paper.

How to people distinguish metals from different mines?

For example, a person is studying the Archaeometallurgy of copper and there are two samples of copper artifacts. Both artifacts are similar in design, so how do they distinguish which copper came from which mine?

Answer: 
They take a small sample and analyze it for trace elements. For example gold bars are samples after they are refined at a mine mill. The sample is taken by drilling a small hole and saving the drill cuttings. The combination of other chemical traces still in the gold are as distinctive as a fingerprints are with humans.

How to become a search and rescue ranger?

I was wondering what is the best way to get a job working as a search and rescue ranger? Would going back to college be the best or going into the military? Maybe ranger law enforcement school? I love the wilderness and backpacking and working somewhere in park services or a guide or something along them lines would make me enjoy my work. I'm willing to do what it takes to make my dreams come true. So any help putting me in the right direction would be a gift to me. Thank you all.

Answer: 
The National Park Service probably uses more search and rescue personnel than any other US organization. I do a lot of volunteer work with them. People look up http://www.nps.gov/personnel/ Some find jobs they would qualify for, but most find a volunteer position they can try for. They learn enough to know if their desire for this kind work is really what they want to do the rest of their lives. They let their supervisors know their goals. They work hard at what they do, to let their supervisors know they would be a good employee. References from supervisors are important when applying for the next job. They keep watching http://www.nps.gov/personnel/, until they find a position they can step up to. Usually it is a seasonal position. This process continues. One can expect to move around a lot. NPS pays moving expenses but only for permanent employees. I met man at Lake Powell who moved to Big Bend Texas, to Kodiak Alaska and to Boise Idaho over a ten year period. He is on the way up. Your main responsibilities will be other than search and rescue. Emergencies are often few and far between I would ask to talk to the chief ranger at a park. These are the folks who direct search and rescue. They could tell you what they like to see in the way of education and job experience

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