Test: The Ever-Evolving World of Science - Class 7 MCQ

The Earth's rotation on its axis causes day and night. As the Earth rotates every 24 hours, different parts of the Earth experience sunlight and darkness, creating the cycle of day and night.

Measuring time is essential for organizing daily activities, such as when to sleep, eat, or work. It also helps us understand natural cycles like day/night and the changing seasons, making life more predictable and manageable.

Ripening is an irreversible change because once a fruit ripens, it cannot go back to its unripe state. This change is part of the natural life cycle of plants.

Photosynthesis enables plants to make their own food using sunlight, carbon dioxide, and water. This process is crucial for all life on Earth, as it forms the foundation of the food chain.

Different branches of science, like physics, chemistry, and biology, often overlap and help explain each other. For example, chemistry helps explain biological processes like plant growth, showing how interconnected science can be.

Curiosity is the spark that drives scientific inquiry. It leads us to ask questions, explore the world around us, and make new discoveries, fostering a deeper understanding of nature.

Science is an adventure because it encourages exploration through curiosity, questioning, and experimentation, making the learning process exciting and full of discoveries.

Science encourages a way of thinking that includes curiosity, questioning, exploring, and understanding patterns in nature — making it a process of continuous learning.

Humans get energy by eating food, while plants use photosynthesis to produce their own energy using sunlight. This difference highlights how both are essential in ecosystems: humans as consumers and plants as producers.

Heat speeds up changes, like melting ice into water or turning liquid water into vapor. This principle is important in daily activities and in scientific processes like cooking and weather.