I'm in the first grade of junior high school this year. Other classes are very good, but geography is not very good. Who can tell me how to learn geography well? I can't read maps. I can't understand what the teacher said about longitude, latitude and latitude

I'm in the first grade of junior high school this year. Other classes are very good, but geography is not very good. Who can tell me how to learn geography well? I can't read maps. I can't understand what the teacher said about longitude, latitude and latitude

The first unit of Geography in grade one of junior high school is the most difficult content in geography. The solution is to use more globes in the process of learning. The standard of longitude and latitude network is "geographic coordinate system", which is equivalent to your classroom's "seat table". With it, you can find a place accurately and quickly, somewhere on the globe (earth)

What are the phenomena of surface tension in life?

Soap bubbles, mosquitoes can lie on the water surface (some species do not belong to this kind), the dosage bucket is the liquid surface will be concave around,

What are the experiments on the surface tension of water
Try to use simple tools

Use a transparent glass and fill it with water. Put a few coins into it, the water will protrude, but when you put a certain amount of coins, the water will overflow

Materials and liquids with strong capillarity
Which two materials have stronger capillary binding with liquid? How high can they absorb?

There are no two, only how do you make them
1. A thin straw or thread with not very tight fiber gap, such as wool
2. The liquid should be water

Water can rise along some materials, called capillarity, pore, water generated
Blank part is to be filled, please help to think, please, I have urgent need! Thank you

The smaller the pore is, the higher the water rises;
For details, please refer to Volume 2 (compulsory + elective) of senior high school physics pep

Can the height of water rise infinitely?
If the capillary diameter becomes infinitely smaller

Capillarity is also limited, it is the reason of the surface tension of liquid
The surface tension is determined for a given liquid
The integration of the surface tension and the surface area of the liquid stops as soon as it equals the potential energy of the liquid
It can't be infinite, unless it's in space without gravity

How to explain capillarity with surface tension
For example, when the mercury column drops in the glass tube, why does the surface tension make it have a downward trend? What is the function or significance of the mercury column's decline?

Mercury column is a non wettable liquid, and it is a convex liquid surface in a thin glass column. Due to the effect of surface tension, the liquid surface has a downward (flattening) trend, so the effect of surface tension is the cause of capillary phenomenon

What are the capillary phenomena

(A) Mercury manometer shows a little less than the actual (b) absorbent paper has water absorption
(C) Oil goes up the wick (d) water goes up the tree

What is capillary phenomenon?

On capillarity
If the dry chalk is put on the wet sponge, the chalk will get damp, but if the dry sponge is put on the wet chalk, the sponge can still keep dry. Try to explain the above phenomenon from the perspective of capillary phenomenon

The gap of chalk is smaller than that of sponge, so the capillary force is larger than that of sponge