Junior high school expository essay antarctica snowless area, junior high school my school expositor

The basic characteristics of the Antarctic climate are: strong and fierce winds, extreme cold, and unpredictable

A total of 3 points, 1 point for each point, and you can score points if you are correct or not).

Hurricanes are constant, rarely human, unpredictable, and barren ice fields.

The Antarctic Wadi is a barren region with gravel scattered across the ground and is known as the most Mars-like region on Earth. It has a strangely wonderful topography and is located on Victorian land in the western part of the McMurdo Sound Range in Antarctica, where there is almost no snowfall, only a few steep rocks, and it is the only area of Antarctica that is free of ice. The area here does not look like Earth at all, and there are sometimes permanent frozen lakes at the bottom of the wadi valley, with ice layers up to several meters thick.

Beneath the ice, there are some mysterious simple organic organisms living in the water with very high salinity, and the study of these mysterious life forms is still ongoing.

This question should not be a brain teaser, then it is necessary to analyze why penguins are not afraid of the cold?

First of all, we have to start with its morphological structure.

From the perspective of geometry and biology, the specific surface area of a spherical object is the smallest, and the smallest specific surface area will mean that it has the smallest contact area with the outside world, and it has the smallest heat dissipation area, and it has the smallest heat dissipation speed.

In terms of body form, the penguin's body has evolved to be as close to a sphere as possible, with a short and thick body, a short and thick neck, and short and thick legs and feet that can be retracted under the belly to reduce the area of contact with the outside world, which can minimize the loss of heat.

Penguins near Antarctica are covered with dense and thick feathers, and the tips of the feathers are curved, like the scales of a fish, which cannot penetrate even water, and can also resist the blowing of strong winds. There is also dense fluff underneath the layers of feathers, like the best quality woolen sweaters. With such good feathers, the penguin is like wearing a thick down coat, and it is waterproof and insulated, and it is not afraid of the cold.

At the same time, penguins have a thick body of fat, which can also play a role in heat preservation. In Antarctica, especially in bad weather, penguins live in colonies, and the colony is constantly moving, inside and outside are constantly exchanged, so that they can warm each other and minimize heat loss.

Penguins' survival is to solve the problem of food after fighting the cold.

The penguin's tiny wings allow it to swim like a flight in the water, and it is fast enough to prey on krill and other small fish in the water.

The more emperor penguins live for 10 years, the more lifespans other penguins are about the same.

The campus is a place we are very familiar with; The campus, where we study together, the campus, where we learn together; The campus is where we live together; The campus is our second home. It shines on us like a fiery sun, and moistens us like spring rain. Let us never forget the heavy responsibility on our shoulders.

Mingli good deeds, Derun life".

This eye-catching slogan is always imprinted in the hearts of each and every one of us. That's right, that's our school's philosophy.

As soon as we step into the gate, a playground is presented in front of our eyes, there is a basketball hoop on the left and right sides of the playground, they are like guards, not afraid of hardship and tiredness, guarding our campus day and night, the playground is planted with ficus leaf, every summer, you will see some students enjoying the shade under the tree, some reading books under the tree, and some playing games and ...... under the treeIn the middle of the playground is the sacred flag-raising platform, and the bright five-star red flag flutters on the flagpole of the flag-raising platform, which looks so peaceful. Every Monday, all teachers and students come to the playground to participate in the solemn flag-raising ceremony. With the national anthem, the national flag was raised rhythmically, and the teachers and students also saluted.

If you go up the stairs on the left, you will find a small garden next to the stairs, and you can't help but look to the right: there is also a small garden on the right, which is small but has a unique flavor. In spring, wildflowers bloom and are full of greenery, butterflies flutter in the grass, and hard-working bees collect honey; In summer, the grass here is so green that if it's a sheep, it will drool when it sees it!

In autumn, the leaves of the only tree in this garden turn yellow, and they fall from under the branches one after another, like yellow butterflies; In winter, it is covered with snow and it is as if the world has turned white.

So, three steps and two steps, came to the learning paradise, quietly listening to the sound of Langlang reading, as if immersive; After taking a closer look at the students' attentive appearance, and all of them were vibrant, their voices resounded throughout the campus, decorating the beautiful campus, making the infinite scenery of the campus icing on the cake, in Longhua Sixth Elementary School is full of learning atmosphere, everywhere decorated with poetic and picturesque ......

This is the campus that carries the countless joys and dreams, tears and sorrows of my primary school years, where every tree, every step, every corridor is so familiar and friendly, and those two old school buildings have cultivated generations of students. How can such a beautiful campus not allow us to spread our wings? How can we not make us look forward to the future?

How do I know your room?