Test: The Wonderful World of Science - Class 6 MCQ

Science is about asking questions and finding answers to understand how things around us work. It helps us learn about everything, from tiny grains of sand to the stars in the sky. It is not about making money, creating languages, or playing games, but about discovering the mysteries of the world and universe through curiosity and exploration.

Curiosity means wanting to know more about the world around us. It is the main reason why people explore and ask questions. Scientists make discoveries because they are curious to understand how things work, why they happen, and what more can be learned. Without curiosity, there would be no motivation to explore or find new things.

The scientific method involves steps like observing a problem, asking questions, making guesses (hypotheses), testing those guesses, and finding a solution. When you check the ink refill of a pen that stopped writing, you are following these steps: observing the problem (pen not writing), asking why, testing (checking the ink), and finding the reason. This is an example of the scientific method in daily life.

Plants grow towards light because they need sunlight to make their food through a process called photosynthesis. Light provides the energy that plants use to convert water and carbon dioxide into food and oxygen. This movement towards light is called phototropism. It helps plants grow healthier and stronger.

Metamorphosis is the process where an organism changes its body shape and structure completely during its life cycle. An example of this is when a caterpillar transforms into a butterfly. This amazing change shows how living things grow and adapt, and it is one of the fascinating mysteries of nature that science helps us understand.

Water boils at 100°C under normal atmospheric pressure. At this temperature, water changes from a liquid to a gas (steam). This is a basic fact in science and is often used in daily life, such as when boiling water for cooking or making tea.

Paper, plastic, and metal can all be recycled. Recycling means reusing these materials to make new products, which helps reduce waste and saves natural resources. For example, used paper can be turned into new paper, plastic bottles can be made into new plastic items, and metal can be melted down and reshaped. Recycling is an important way to protect the environment.

Farmers need to understand how plants grow to ensure they provide the right conditions, such as proper sunlight, water, soil, and nutrients. This knowledge helps them improve crop yields and farming methods, leading to better and healthier crops. Understanding plant growth is essential for successful agriculture.

The first step in the scientific method is observation. This means noticing something interesting or unusual in the world around you. Observations lead to questions, which then start the process of finding answers through experiments and analysis. For example, noticing that a plant grows towards light is an observation that can lead to further scientific exploration.

Water is essential for life because it is necessary for all living things to survive. It is a major part of our bodies, helps in digestion, keeps us hydrated, and supports many vital processes like transporting nutrients and regulating body temperature. Without water, life on Earth would not be possible.