Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-175

Energy conversion is a fundamental (35) __________ of science. It explains how energy, which is the power to do work, changes its form. Energy exists in (36) __________ different forms, such as chemical, electrical, light, and heat. The most important rule to remember is that energy cannot be created or destroyed; it simply changes from one form (37) __________ another. This idea is central to understanding physics and the world around us.

So, what does it mean to 'convert' energy? To convert means to change something from one form or character into another. This process of transformation is called energy conversion, and it (38) __________ place constantly. When we talk about using energy, we are usually talking about converting it. For instance, we turn electrical energy into light energy to see in the dark.

Everyday objects are great examples of energy conversion. For example, a lamp is a simple device (39) __________ converts electrical energy into light and heat. Similarly, a plant uses photosynthesis to change light energy from the sun into chemical energy, which it stores in its leaves and stem. Even a moving car turns the chemical energy in fuel into kinetic energy, the energy of motion.

Our own bodies are amazing energy converters. The chemical energy from the food we eat (40) __________ into kinetic energy for movement, which allows us to walk, run, and play sports. (41) __________, some of this energy becomes heat, which helps maintain our body temperature, keeping us warm even on a cold day. This conversion is always happening inside us.

In conclusion, energy conversion is a process that happens everywhere, from the smallest plant to the largest power station. Understanding energy conversion is (42) __________ for seeing how the world works, from our technology to our own biology. It is not about making new energy, but about transforming the energy that already exists into a form that is useful for a specific purpose.

From the steaming bowls of Phở in Hanoi to the sizzling Bánh Xèo in Ho Chi Minh City, Vietnamese street food is a cornerstone of the nation's identity. This culinary world, celebrated for its authenticity and affordability, has recently gained international acclaim, with prestigious organizations like the Michelin Guide recognizing stalls in Vietnam's major cities. This recognition highlights a global appreciation for a deeply local tradition. However, for every delicious bite of 'bánh tráng nướng' shared among friends, a lingering question remains: is this beloved cultural experience a gamble with our health?

Street food is much more than just a quick meal; it is the lifeblood of urban social interaction. The plastic stools lining the pavements are not just furniture; they are front-row seats to the vibrant rhythm of city life. For teenagers, gathering at a favourite stall is a cherished ritual, a way to bond and create shared memories over affordable and tasty snacks. These food stalls are hubs of community, preserving culinary traditions passed down through generations. They represent an accessible, authentic connection to the local culture that cannot be replicated in a formal restaurant setting.

Despite its cultural importance, the other side of the street food coin presents serious health concerns. Many street food vendors operate in informal settings, often lacking access to clean water, proper refrigeration, and adequate waste disposal systems. This can lead to questionable hygiene practices. Furthermore, the origins of ingredients can be obscure, raising doubts about their quality and safety. Consequently, consumers face a potential risk of foodborne illnesses. While many vendors are responsible, the lack of consistent regulation means that they are not all held to the same high standards, leaving the public to navigate these risks on their own.

In response to these concerns, a shift is beginning to occur. Local governments have started implementing food safety training programs for vendors, and a new wave of 'clean' street food businesses is emerging, proudly advertising their hygienic practices and quality ingredients. At the same time, consumers are becoming more discerning. Armed with information from social media and online reviews, they are actively seeking out vendors known for both their delicious food and their commitment to cleanliness. This growing awareness is crucial for pushing the industry toward a safer future.

Ultimately, Vietnamese street food exists in a delicate balance. It is an irreplaceable cultural treasure that offers a unique window into the soul of the country. Navigating its world requires a mindful approach—celebrating the rich traditions while demanding higher standards of safety. The future of this culinary landscape depends on the collective effort of vendors, consumers, and authorities to preserve its authenticity while ensuring it is a safe and enjoyable experience for everyone.