Đề ôn thi Đề thi vào lớp 10 Phú Thọ môn Tiếng Anh - Mã đề PTH-133

A battery is a device (15) __________ converts chemical energy into electrical power. Inside every battery, there are two terminals—a positive one and a negative one—and a special chemical substance called an electrolyte. When you connect a device, a chemical reaction (16) __________ place between the chemicals at the terminals and the electrolyte. This reaction makes tiny particles called electrons build up at the negative terminal, creating a voltage.

(17) __________, if you connect a wire between the terminals, the electrons will flow from the negative to the positive side to balance out. This flow is an electric current. The energy that is produced (18) __________ to power devices like your phone or remote control. Modern batteries are very efficient, but the chemical reaction is not permanent. After a battery (19) __________ all its stored chemical energy, it stops working and must be (20) __________.

Imagine drawing a detailed object on your computer and then, with the click of a button, watching a machine build it right before your eyes. This is the magic of 3D printing, also known as additive manufacturing. Unlike traditional methods that cut or carve material away, 3D printing builds objects layer by layer from a digital design. This technology is transforming industries from healthcare to engineering, and now it's making its way into the classroom.

For students, 3D printing opens up a new world of possibilities for schoolwork. Instead of just drawing a diagram, a biology student can print a detailed model of a human heart. For geography, you can create precise models of mountains and valleys, known as topographic maps. Art students can design and print unique sculptures or custom jewelry. This hands-on approach makes learning more engaging and helps students better understand abstract concepts by turning them into physical objects they can hold.

This wave of innovation is also present in Vietnam. Leading institutions like the Hanoi University of Science and Technology have set up 'Fab Labs' (Fabrication Laboratories) to give students access to this technology. These labs encourage students to move beyond simple school assignments and start tackling more complex challenges, preparing them for future careers in science and technology. It creates a bridge between theoretical knowledge learned in class and practical, real-world application.

Ultimately, the goal of bringing 3D printing into schools is not just to make interesting models. It's about empowering students to become creators and problem-solvers. When students can design, test, and refine their own creations, they learn valuable skills in critical thinking and perseverance. This technology shifts the focus from being a passive consumer of information to an active participant in the process of innovation, turning your imagination into reality.