Go through BSE Odisha Class 7 Science Solutions and Class 7 Science Chapter 1 The Ever-Evolving World of Science Question Answer to understand textbook questions more clearly.
Class 7 Science Curiosity Chapter 1 Question Answer
Science Curiosity Class 7 Chapter 1 Question Answer
The Ever-Evolving World of Science Class 7 Questions and Answers
Very Short Answer Type Questions
Question 1.
Ramesh was wearing a white shirt with a turmeric stain. Explain the scientific inquiry that may result in this situation.
Answer:
This situation may push us to ask why some substances leave permanent stains while others do not. It also encourages us to explore the properties of materials and how different types of substances interact with each other.
Question 2.
On a hot summer day, Anamika noticed that water disappeared from a bucket left outside. Later, she observed that clouds formed and it rained. Mention the primary natural source of energy that is responsible for driving this water cycle. Explain its importance.
Answer:
The primary source of energy for the water cycle is the heat generated by the Sun. It is important because it drives continuous movement of water through evaporation, condensation, and precipitation, helping maintain life and environmental balance on the Earth.
Question 3.
Mention one responsibility that comes with scientific progress. Mention its importance.
Answer:
Making informed and ethical choices is an unavoidable responsibility that comes with scientific progress. This is important because science can greatly impact society and the environment. Using knowledge responsibly ensures that discoveries are used for the well-being of people and do not harm nature or future generations.
Question 4.
Answer the following questions.
(i) In this chapter, it has been emphasised that science is a process, not just a subject. Explain.
(ii) While eating a fruit salad, Ratika observed that most of the fruits tasted sour. What kind of scientific thinking is developed in this situation?
Answer:
(i) Science is described as a process because it encourages questions, curiosity and logical thinking. Instead of rote learning, it promotes learning through observations and experimentation.
(ii) Based on the taste of a substance, one might think about the type of substance and its properties, i.e., they can be acidic, basic, or neutral.
Note: Never taste unknown substances, as they can be dangerous.
Short Answer Type Questions
Question 1.
‘Scientific observations help us understand everyday phenomenon’. Justify this statement by giving two examples from your everyday life.
Answer:
Scientific observations help us understand how and why things happen around us. By carefully observing changes, we can identify their patterns and causes. Some of the examples that can be observed in our everyday life include:
- Glowing of an electric bulb
- Ripening of fruits [Any other]
Question 2.
Why is the understanding of various types of changes taking place around us important in science?
Answer:
Understanding the types of changes taking place around us helps us know how substances behave under different conditions, which is useful in various daily-life applications. Changes like melting of ice, boiling of water, and folding of paper can be reversed, whereas changes like cooking food, cutting a piece of paper, and breaking glass cannot be reversed. This knowledge is essential and can be used in areas like cooking, manufacturing, and chemical processing, where choosing the right kind of change is important.
Long Answer Type Questions
Question 1.
“Science is not only about learning facts – it is also about how we think and solve problems.” Explain this statement with two examples from your daily life.
Answer:
Science is more than just remembering facts. It involves thinking logically, asking questions, observing carefully, and solving problems based on evidences. It shapes the way we understand and interact with the world around us.
For example:
- When someone wonders why lemon juice tastes sour, they are using observation and curiosity. Through experimentation, they may discover that lemon contains acid, showing how science helps explain the properties of substances.
- When we feel a metal spoon become hot after placing it in tea, we learn through experience that metals conduct heat. This leads to a deeper understanding of heat transfer and properties of materials.