Not AI But Real Answers By Experts!
Basically, a diamond is a beautiful gem. So we might say that its beauty makes it desirable and valuable. The diamond is also the hardest sub- stance known to man, and this hardness is very useful. So this also makes the diamond valuable. Now, why should one diamond more valuable than another? Well, the diamonds that are … Read more
Every single part of the human body receives a constant supply of blood which is pumped by the heart. In plants and trees, every single part receives water and nourishment, which we call sap. But a tree has no pump because it has no heart. So how does the sap go up a tree? Science … Read more
Sometimes when we are outdoors, a sudden and mysterious thing takes place. A wind begins to blow. We cannot see it, but we feel it, and we have no idea what started it. The wind is simply the motion of air over the earth. What Causes The Air To Move To? All winds are caused … Read more
Did you know that the continents of the world rest on granite? It is the hard rock that forms much of the earth’s outer crust. The name “granite” comes from the Latin word granum, meaning “grain”. The grains in granite are crystals of quartz, feldspar, mica, and hornblende. Granite varies in color. It may be … Read more
Uranium has existed on the earth for billions of years, but until man tried to make an atomic bomb and use atomic energy, most people did not know it existed. Uranium is a metal, an ore, and one of the heaviest elements. Uranium is actually more common on the earth’s surface than mercury or silver. … Read more
How do we know what is going on in the world around us? We use our senses. Through them, we can see, hear, feel, and taste. But there are some scientists who believe that man can gain information without the use of senses. They believe the human mind has certain powers that have not yet … Read more
Does “thought” take place at the fastest speed possible? In times past, this was held to be true, which explains the expression “quick as thought”. Today we know that thought is an impulse that must travel along with a nerve fiber in our body, and this speed can be measured accurately. The surprising thing is … Read more
Nowadays we hear about “flying saucers”, and people wonder if there are other worlds where some sort of living creature might exist. The reason people can even imagine such things is that we know that our solar system is only a tiny part of the whole immense universe. And scientists believe that there are probably millions of … Read more
The pituitary gland is part of the endocrine system of the body, so let us start with that. The endocrine system consists of glands located in various parts of the body. These glands produce active chemical substances called“hormones”. These glands send their secretions directly into the bloodstream to be distributed throughout the body. The endocrine … Read more
In the body there are organs that produce secretions. These organs are called “glands”. Usually, the word “gland” is applied to endocrine glands, or glands of internal secretion. They are also called “ductless glands”. These glands produce secretions that do not go into ducts or tubes, but which are absorbed directly into the bloodstream. The … Read more