1. The Wonderful World of Science
Exercises
Stop and Reflect (Pages 9 and 10)
A.
1 - A 2 -C 3 -D 4 -A 5 -A
B. 1. True
2. False
3. False
4. True
C. 1. -C 2- A 3-D 4- B
D. 1. Science is present in everything around us, from natural elements like mountains and forests to
human activities such as cooking, playing, and even space exploration. It helps us understand
how things work and lead to new discoveries.
2. A child experimenting with different ways to stack blocks and a gardener testing different
amounts of water for plants both use observation and trial-and-error, just like scientists. Even
a cook adjusting spices in a dish to get the perfect taste is applying scientific methods.
3. Earth has water, oxygen and a suitable temperature, making it the only known planet to
support life. Other planets lack the necessary conditions like breathable air and liquid water,
which are essential for survival.
4. Food provides essential nutrients like proteins for muscle growth and carbohydrates for
energy. Vitamins and minerals help strengthen bones, improve immunity and keep the body
functioning properly.
Crisp and Accurate (Page 10)
A. 1. Science is a way of thinking, observing and doing things to understand the world and uncover
the universe's secrets.
2. The people who collect data or information and utilise it to build theories and hypotheses are
known as scientists.
3. Temperature is an important scientific concept that may be understood in this case. The
degree of hot or cold is known as the temperature. We also measure our temperature when
we suffer from a fever.
4. Food is required to grow and survive. Plants and animals also need food. Plants make their
own food and animals get their food in various ways. We humans get our food from farms.
B. 1. Science is present in everything around us, from natural elements like mountains and forests to
human activities such as cooking, playing and even space exploration. It helps us understand
how things work and lead to new discoveries.
2. Science allows us to observe, experiment and learn about the world. It helps explain natural
phenomena, like why plants grow, how water changes its form and why objects fall due to
gravity.
3. We get our food from farms where crops and vegetables are grown, and animals are raised.
Plants make their own food through photosynthesis, and humans consume plants or animals
for nutrition.
4. Temperature measures how hot or cold something is. It affects daily life, such as using hot
water in winter and cold water in summer. It also plays a role in scientific processes like
freezing, boiling and measuring fever in humans.
Think and Explain (Page 10)
1. Curiosity drives us to explore and understand the world. Searching for answers helps us gain
knowledge, solve problems and make new discoveries. Scientists follow a systematic approach to
find explanations, leading to advancements in technology and everyday life.
2. Earth supports life because it has essential conditions like oxygen, water, sunlight and a suitable
temperature. It has diverse ecosystems where plants, animals and humans coexist. Unlike other
planets, earth has an atmosphere that protects living beings and provides necessary resources for
survival.
3. The following are the steps involved in the scientific method.
. To observe something that sparks the interest and someone wants to understand
. To think and ask questions about it
. To predict a possible answer to that question
. To test that answer through experiments and observations
. To analyse the result and to see if it concludes our question
4. Many different objects in our environment are made up of various materials. The following is a list
of some of the objects.
. The paper used for writing comes from wood.
. The metal key used to unlock doors is created from metal ores found inside the earth.
. The plastic ruler is produced in factories.
. The rubber eraser comes from the rubber plant.
. The magnet that keeps our box closed is made up of metals.
. The clothes come from plants (jute and cotton) or are prepared by us.
. The cup used for drinking is made from clay.
5. Food is essential for growth, energy and survival. It provides necessary nutrients like proteins,
carbohydrates and vitamins. Plants make their food through photosynthesis, and animals depend
on plants or other animals for nutrition. A balanced diet helps in proper development and overall
well-being.
0 Comments