Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-106

The Sun, at the center of our solar system, provides the heat and light essential for life on Earth. But what is this massive ball of fire made of? It isn't solid or liquid, but an incredibly hot ball of gas. The Sun is (35) __________ giant star, and like others, its composition is simple yet fascinating. Understanding its components helps us comprehend the processes that power our solar system.

Scientists have studied the Sun's light to learn its ingredients. It is mainly (36) __________ of two primary gases: hydrogen and helium. Approximately 74% of the Sun’s mass is hydrogen, and about 24% is helium. These two elements together make up 98% of the Sun. The small remaining percentage consists of a mix of heavier elements like oxygen and carbon.

This transformation happens deep inside the Sun’s core. Here, the temperature and pressure are immense; (37) __________, hydrogen atoms are squeezed so forcefully that they fuse into helium. This process, nuclear fusion, (38) __________ an enormous amount of energy as light and heat, which then travels through space to our planet.

Early astronomers explained that the Sun (39) __________ trace amounts of other elements too. This discovery was crucial for (40) __________ the life cycle of stars. However, compared to the vast amounts of hydrogen and helium, these heavier elements are just a (41) __________ in the ocean, representing less than 2% of its mass.

The conditions in the Sun's core are essential. If the Sun’s core were not so hot and dense, this fusion reaction (42) __________. The balance between gravity pulling inward and the energy from fusion pushing outward is what keeps our Sun stable, allowing it to shine for billions of years.

For many Vietnamese teenagers, the dream of studying abroad is a powerful ambition. The huge number of students taking the IELTS exam each year is clear evidence of this goal, with many hoping to attend universities in countries like Australia, the UK, or Canada. However, pursuing higher education overseas is a major life decision that involves significant investment of time and money. It is crucial for students and their families to carefully weigh the advantages and disadvantages before committing to this path. This passage will explore the key benefits and challenges to help you make a more informed choice about your future.

The attractions of an international degree are numerous. Firstly, students gain access to world-class education systems that often emphasize practical skills, critical thinking, and creativity over rote memorization. This different approach to learning can be incredibly stimulating. Secondly, living independently in a new country fosters immense personal growth. Students learn to manage their own finances, solve problems, and become more self-reliant and confident. This experience also builds cultural awareness and provides opportunities to create a global network of friends and contacts. These experiences and skills are incredibly valuable for a future career.

However, the path of an international student is not without its difficulties. The most significant barrier for most families is the financial cost. Tuition fees, accommodation, and daily living expenses in developed countries can be extremely high. Beyond the financial strain, there is the emotional challenge of culture shock and homesickness. Being far from family and friends in an unfamiliar environment can be lonely. Students must adapt to new social customs, food, and communication styles, and this adjustment can make them feel isolated at first.

In recent years, an interesting trend has emerged in Vietnam's education landscape. A growing number of international universities have established campuses right here in the country. These institutions offer internationally recognized curricula and degrees, often taught by foreign professors, but at a fraction of the cost of studying abroad. This provides a compelling alternative for students who want a global-standard education without the high expense or the emotional challenges of leaving their home and support system.

Ultimately, deciding whether to study abroad is a deeply personal choice. There is no single correct answer. It depends on a family's financial situation, a student's academic goals, and their emotional readiness for the adventure. While an overseas degree can be a life-changing opportunity that opens doors to a global career, it is not the only path to success. The rise of quality local alternatives means that a world-class education is more accessible than ever. The key is to research all options thoroughly and have open discussions with your family to determine the best fit for you.