Tag Archives: Climate

Who invented the umbrella?

When it rains, we may put up an umbrella to help keep the water off.  But actually the umbrella was not invented as protection against rain. The first umbrellas were used as shades against the hot sun.  in fact, the umbrella gets its name from an old Latin word meaning “little shadow.” No one knows …

Rate this:

Continue reading

Why do we perspire?

The sweat glands help keep you cool in the summer.  When we get very warm, little beads of water called sweat form on our skin.  Perspiration is a quick method of cooling off the body. You can test this by wetting your hands and waving them rapidly.  The water evaporates quickly and makes your hands …

Rate this:

Continue reading

How are natural diamonds formed?

Diamonds are formed in dying volcanoes.  As the hot lava cools, great pressure and heat act on the carbon found in the lava and change the carbon into diamonds. You may know that a diamond is simply a crystal of common carbon, of which coal is largely formed. Diamonds were formed millions of years ago in …

Rate this:

Continue reading

What does ‘dew point’ mean?

The dew point is the temperature at which moisture in the air begins to condense. Perhaps the air doesn’t seem damp at all.  It does, however, have many tiny, invisible bits of water moving about in it.  We call these tiny specks of moisture “water vapor.” Cold air cannot hold as much moisture at warm …

Rate this:

Continue reading

Why is the season of autumn called fall?

Autumn is the season of the year that comes between summer and winter.  For those of us who live where there is a marked changed of season, we know it’s autumn when the leaves change color and the crisp air pinches our cheeks. Americans often call this season “fall” because it is the time of …

Rate this:

Continue reading

How does a plant make its food?

Green plants make food in their leaves in a special food-making process called “photosynthesis.” Green plants make food in their leaves in a special food-making process called “photosynthesis” (pronounced foe toe SIN three sis), a word meaning “putting together with light.” A leaf manufactures food by taking carbon dioxide from the air and water from …

Rate this:

Continue reading

Why is it cooler in the mountains?

Probably  you have noticed that it is usually much cooler in the mountains than in nearby lowland places. This is because the higher  up you go, the less air there is above you.  The air becomes colder because it cannot absorb as much heat as it is able to hold at sea level. Perhaps the …

Rate this:

Continue reading

What’s in a hotdog?

Hot dogs are a staple food in many Filipino households.  They’re part of our breakfast, merienda, and baon. Family outings, children’s parties, and barbecues are incomplete without them.  Yes, they’re very convenient: They’re early to prepare, relatively inexpensive, and don’t spoil easily—important in our hot and humid climate.  Some mothers also believe that hot dogs …

Rate this:

Continue reading

What is the origin of the umbrella?

The origin of the modern-day umbrella was a sunshade used by nobility in ancient Persia and Egypt. It seems natural to put up an umbrella to keep off the rain.  But actually the umbrella was not invented as protection against rain. Its first use was as a shade against the sun.  in fact, the name …

Rate this:

Continue reading

What is a timberline?

Some mountains have trees growing clear to their tops, but on many high mountains there is a line above which trees stop growing. The place where trees stop growing is called the “timberline”.  Trees don’t grow above it because they cannot survive the freezing temperatures there. Above the timberline the mountainside is likely to be …

Rate this:

Continue reading