- 1 6 Bài soạn "Cách làm bài văn nghị luận về một đoạn thơ, bài thơ" lớp 9 hay nhất
- 2 6 Bài soạn "Chủ đề và dàn bài của bài văn tự sự" lớp 6 hay nhất
- 3 6 Bài soạn "Đề văn biểu cảm và cách làm bài văn biểu cảm" lớp 7 hay nhất
- 4 6 Bài soạn "Cách làm bài văn biểu cảm về tác phẩm văn học" lớp 7 hay nhất
- 5 10 Bài văn so sánh hình ảnh người lính trong hai bài thơ "Đồng chí" và "Bài thơ về tiểu đội xe không kính" lớp 9 hay nhất
- 6 6 Bài soạn "Đề văn thuyết minh và cách làm bài văn thuyết minh" hay nhất
- 7 8 Bài văn cảm nhận về khổ thơ cuối bài "Sang thu" của Hữu Thỉnh lớp 9 hay nhất
- 8 6 Bài soạn "Tìm hiểu đề và cách làm bài văn tự sự" lớp 6 hay nhất
- 9 5 Bài soạn Phân tích đề, lập dàn ý bài văn nghị luận (Ngữ Văn 11) hay nhất
- 10 6 Bài soạn "Luyện tập: Đưa yếu tố biểu cảm vào bài văn nghị luận" lớp 8 hay nhất
Introduction to Wave Optics
The colors reflected by this compact disc vary with angle and are not caused by pigments. Colors such as these are direct evidence of the wave character of light. (credit: Infopro, Wikimedia Commons) Examine a compact ...
Accessory Structures of the Skin
Accessory structures of the skin include hair, nails, sweat glands, and sebaceous glands. These structures embryologically originate from the epidermis and can extend down through the dermis into the hypodermis. Hair is a keratinous filament growing out ...
Cell Division
The continuity of life from one cell to another has its foundation in the reproduction of cells by way of the cell cycle. The cell cycle is an orderly sequence of events that describes the stages of a cell’s life from the division of a single parent ...
Introduction to Society and Social Interaction
Sociologists study how societies interact with the environment and how they use technology. This Maasai village in Tanzania looks very different from a rural American town. (Photo courtesy of Guillaume ...
Importance of Biodiversity
This tropical lowland rainforest in Madagascar is an example of a high biodiversity habitat. This particular location is protected within a national forest, yet only 10 percent of the original coastal lowland forest remains, and research suggests half the ...
Patterns in Spectra Reveal More Quantization
High-resolution measurements of atomic and molecular spectra show that the spectral lines are even more complex than they first appear. In this section, we will see that this complexity has yielded important new information about electrons and their ...
Discovery of the Atom
How do we know that atoms are really there if we cannot see them with our eyes? A brief account of the progression from the proposal of atoms by the Greeks to the first direct evidence of their existence follows. People have long speculated ...
Common Misconceptions about Evolution
Although the theory of evolution initially generated some controversy, by 20 years after the publication of On the Origin of Species it was almost universally accepted by biologists, particularly younger biologists. Nevertheless, the theory of evolution is ...
Nuclear Radioactivity
The discovery and study of nuclear radioactivity quickly revealed evidence of revolutionary new physics. In addition, uses for nuclear radiation also emerged quickly—for example, people such as Ernest Rutherford used it to determine the size of the nucleus ...
Social Change
Collective behavior and social movements are just two of the forces driving social change , which is the change in society created through social movements as well as external factors like environmental shifts or technological innovations. ...




