Science

Probe and Ponder (Page 1) Question: Which of the entities in the picture above consist of matter, and which of them do not? Answer: The students, the books, the bags, the clothes, and the air around them consist of matter because they have mass and take up space. Things like thoughts, ideas, light, or the … Read more

Probe and Ponder (Page 1) Question: Why is it possible to pile up stones or sand, but not a liquid like water? Answer: Stones and sand are solids. Their particles are held together very tightly, so they have a fixed shape and can be piled up. Water is a liquid. Its particles are not held … Read more

Page 1: Probe and ponder Why are winds stronger on some days than on others? Answer: Winds are caused by differences in air pressure. Air moves from a place with high pressure to a place with low pressure. When the difference in pressure between two places is very large, the air moves very fast, which … Read more

Page 1: Probe and ponder Why does it feel harder to pedal a bicycle when going uphill than on flat ground? Answer: It feels harder to pedal uphill because you are working against the force of gravity, which is trying to pull you and your bicycle back down the hill. On flat ground, you mainly … Read more

Probe and Ponder If we don’t have an electric lamp while making an electric circuit with an electric cell, is there any other way through which we can find out if current is flowing in the circuit? Yes, there is another way. We can use a magnetic compass. If you place a magnetic compass near … Read more

Questions from “Probe and ponder” (Page 1) 1. How does your body respond to an infection such as common cold? Answer: When your body gets an infection like the common cold, your immune system starts to fight the germs (viruses) causing it. This fight can cause symptoms like a stuffy nose, sore throat, fever, and … Read more

In-Text Questions and Answers This section covers the questions asked within the paragraphs of the chapter. Question (Page 2): You might have seen some people using reading glasses. How does it help them see better? Answer: Reading glasses use a special curved glass called a lens. This lens bends light in a way that makes … Read more