Do You Know
Questions & Answers on General Knowledge.
What is lichen?
Thought to be among the oldest living things on Earth, lichen is a unique growth that is made up of a fungus and either green algae or bacteria called cyanobacteria. The algae or bacteria live underneath the sheltering fungus, and provide it with sugars (food) from photosynthesis. In return, they receive protection from the sunlight and are able to live without drying out. In this way, lichen represents one of the most unique living "partnerships" on Earth. Lichen is a hardy plant that grows on all kinds of bare surfaces in extreme environments, such as rocks, tree trunks, desert sand, cleared soil, and living bark. Most kinds grow very slowly—often less than 1 millimeter per year.
Why is the twenty-first century called the Age of Terrorism?
Why do people fall ill?
How does one create an electric or magnetic field?
What animals other than dinosaurs lived during the Jurassic period?
If energy is always conserved, why does a pendulum eventually stop swinging if you leave it alone?
Which dinosaur was the fastest?
What is the Sun made out of?
Why do I have to wash my hands after handling my pet turtle?
Can a rocket, starting back toward the earth from 30,000 feet, reach the speed of sound before reaching the earth?
How did the cartoon character Bugs Bunny get his name?
Why is the Tang dynasty famous?
What is the structure of a wolf pack?
Where in space could you ice skate?
Why does a basketball bounce higher than a bowling ball?
A man falls into the center of the earth. how much does he weight? Which way is space bent in the center of the earth?
Why do washed clothes dry faster in open air than in a closed room?
How do compasses work?
What is the dangerous part of electricity: charge, current, voltage, or what?
How do you make an energy converter to convert water into energy?
What is lichen?
What items should be in a first-aid kit?
Why do I see my shadow on the sidewalk on a sunny day?
What gives Uranus and Neptune their blue colour?
What is the corona?
How does a bicycle work?
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Dangerous Situations And How To Escape
Feet trapped in algae
If possible try to float on your back the same as we did for the cramp. If your head is below water then try not panic and conserve oxygen. Using your hand slide it down along your legs until you can get the algae off of you. Remember that struggling can make things a lot worse.