Đề ôn thi Đề thi vào lớp 10 Tây Ninh môn Tiếng Anh - Mã đề TNI-73

The Asteroid Belt is a torus-shaped region in the Solar System, located roughly between the orbits of Mars and Jupiter. It is where the vast (29) __________ of the Solar System's asteroids are found. These asteroids, (30) __________ are also known as minor planets, are rocky and metallic bodies that orbit the Sun. German astronomer Johann Titius first (31) __________ a pattern in the planets' orbits in 1766, suggesting a planet should exist in this gap.

(32) __________, instead of a single large planet, astronomers discovered thousands of smaller bodies. It is widely believed that these pieces of rock were prevented from coming together to form a planet by the powerful gravity of Jupiter. The objects within the belt are not evenly distributed; they are separated by huge distances. In fact, most of the belt is empty space, which is why it (33) __________ safely by several spacecraft without any incident. The largest object in the belt is Ceres, a dwarf planet that (34) __________ about one-third of the belt's total mass.

When you enjoy a meal, you probably think about the ingredients, but not the ground they came from. Soil is a vital resource, yet we often overlook its health. Soil degradation, which is the decline in soil quality, is a serious environmental problem affecting the entire planet. This 'invisible' issue directly threatens our ability to grow food, making it a critical concern for global food security and the future of farming everywhere, including in Vietnam.

The causes of soil degradation can be divided into two main categories. There are natural causes, such as erosion from strong winds and heavy rain, which slowly wear away the topsoil. However, human activities are often a much bigger problem. Actions like deforestation (cutting down forests) and intensive farming, where the same crop is grown repeatedly without giving the soil time to recover, significantly accelerate the damage to this precious resource.

In Vietnam, especially in agricultural regions like the Central Highlands, the effects of human activity are clear. The improper use of chemical fertilizers for valuable cash crops like coffee is a major contributor to soil degradation. While these chemicals can boost production in the short term, their overuse makes the soil acidic and less fertile over time. This reduces its ability to support healthy plant growth, creating a long-term problem for local farmers and the nation's agricultural output.

Fortunately, it is not too late to act. Farmers and governments are working on solutions to protect and restore soil health. Sustainable farming methods, such as crop rotation (planting different crops in sequence) and using organic fertilizers instead of chemical ones, can help rebuild soil quality. Initiatives from Vietnam's Ministry of Agriculture and Rural Development also aim to promote these better practices. Protecting the soil is essential for ensuring we can feed future generations.