Do You Know
Questions & Answers on General Knowledge.
What is the Joshua tree?
The Joshua tree is a desert tree that grows in southwestern North America, in California, Arizona, Utah, and Nevada. A native of the Mojave Desert, these droughttolerant trees thrive in the open grasslands of California’s Joshua Tree National Park. The Mormon pioneers named this tree after the prophet Joshua, because its extended branches resembled the outstretched arm of Joshua as he pointed with his spear to the ancient city of Ai. The trees are twisted and spiky, with tough leaves, and look a little bit like a tree from a Dr. Seuss book. Joshua trees can grow from seed or from an underground rhizome of another Joshua tree. They grow very slowly, sometimes 3.9 to 7.8 inches (10 to 20 centimeters) in their first few years. The tallest trees reach about 49 feet (15 meters) tall. The trunk of a Joshua tree is made of thousands of small fibers and does not have yearly growth rings, Which makes it hard for scientists to tell the tree’s age. Although the fragile tree has shallow roots, if it survives the harsh desert environment, it can live hundreds— even thousands—of years.
I have read about how black holes can emit X-rays and radiation. If they absorb light, why do they emit these other things?
Does Africa have any big lakes?
What happens when a speaker blows?
How does a telephone work?
Did science play a part in the Renaissance?
What does the term 'Blue Moon'mean?
Why does water boil quicker when you add salt?
Why was the pachycephalosaurus special?
How many planets are there?
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Is the Sahara the only desert in Africa?
How does a laser diode work?
How many parts are there to the brain?
Why does the body need vitamins and minerals?
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What is the Ring of Fire?
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What is hell?
How are the months of the year named?
Don't any aquatic plants have woody trunks?
What was the Bismarck?
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What causes "growing pains"?
What is the difference between "thickness" and viscosity? Is viscosity just a fancy word for thickness?
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