Tamilnadu Samacheer Kalvi 5th Science Solutions Term 1 Chapter 4 Science In Everyday Life
Samacheer Kalvi 5th Science Guide Science in Everyday Life Text Book Back Questions and Answers
I. Choose the correct answer.
1. Blue appearance of the sky is due to________ of light.
a. reflection b. refraction c. interference d. scattering
2. Who is known as Missile Man of India?
a. Sir. C.V.Raman b. Dr. A.P.J. Abdul Kalam
c. Dr. M.S. Swaminathan d. Ramanujan
3. An example for reversible change is
a. melting of ice b. burst of balloon
c. burning paper d. change of milk into curd
I. Choose the correct answer.
1. Blue appearance of the sky is due to________ of light.
a. reflection b. refraction c. interference d. scattering
2. Who is known as Missile Man of India?
a. Sir. C.V.Raman b. Dr. A.P.J. Abdul Kalam
c. Dr. M.S. Swaminathan d. Ramanujan
3. An example for reversible change is
a. melting of ice b. burst of balloon
c. burning paper d. change of milk into curd
4. Chemical reactions are example for
a. reversible change b. irreversible change
c. both of them d. none of them
5. Which of the following is not an organic waste?
a. Flowers b. Vegetables
c. Fruits d. Battery
4. Chemical reactions are example for
a. reversible change b. irreversible change
c. both of them d. none of them
5. Which of the following is not an organic waste?
a. Flowers b. Vegetables
c. Fruits d. Battery
II. Fill in the blanks.
1. The book ‘Wings of fire‛ was written by _____
2. A stretched rubber band comes back to normal shape. It is an example for _________
3. Most of the physical changes are __________ changes.
4. News paper is a _____________ waste.
5. Wastes from house and apartments are called _____________ waste.
II. Fill in the blanks.
1. The book ‘Wings of fire‛ was written by Dr. A.P.J. Abdul Kalam
2. A stretched rubber band comes back to normal shape. It is an example for Reversible Change
3. Most of the physical changes are reversible changes.
4. News paper is a Recyclable wastes waste.
5. Wastes from house and apartments are called household waste.
III. Match the following.
Bud to flower - Dr. A.P.J. Abdul Kalam
Reversible change - Recyclable waste
India 2020 - Organic waste
Paper - Melting of ice
Vegetables - Irreversible change
III. Match the following.
Bud to flower - Dr. A.P.J. Abdul Kalam
Reversible change - Recyclable waste
India 2020 - Organic waste
Paper - Melting of ice
Vegetables - Irreversible change
IV. Circle the odd one.
1. a) Melting b) Freezing c) Boiling d) Cooking
2. a) Boiling b) Burning c) Cooking d) Rusting of iron
3. a) Vegetables b) Flowers c) Fruits d) Chemicals
4. a) Paper b) Glass c) Metals d) Paints
IV. Circle the odd one.
1. a) Melting b) Freezing c) Boiling d) Cooking
2. a) Boiling b) Burning c) Cooking d) Rusting of iron
3. a) Vegetables b) Flowers c) Fruits d) Chemicals
4. a) Paper b) Glass c) Metals d) Paints
V. Answer briefly.
1. Sky appears blue in colour. Why?
2. What is reversible change?
3. Differentiate reversible and irreversible changes.
4. What are the different types of wastes?
5 Write a note on e-waste.
6 Name the scientists from Tamil Nadu?
VI. Answer in detail.
1. Write about different household wastes.
2. Explain the need for waste disposal.
3. How can you reduce wastes in your school environment?
Sunlight is scattered by the gases and particles present in the air. The white light we see is composed of different colours such as violet, indigo, blue, green, yellow, orange and red (VIBGYOR). Among these colours, blue is scattered more. Because of this reason, sky appears blue most of the time.
2. What is reversible change?
Changes which can be reversed are called reversible changes. If you keep water in the freezer for some time, it is tranformed into ice. If it is taken out, it becomes water again. This is a reversible change.
3. Differentiate reversible and irreversible changes.
4. What are the different types of wastes?
Organic Waste , Toxic waste, solid waste, recyclable waste and e-waste
5 Write a note on e-waste
E-wastes are Computer parts, Electronic materials, Cell phone parts, CFL bulbs which comprises 70% of our overall toxic waste.
Nearly 40 million tons of electronic waste is generated every year worldwide.
6. Name the scientists from Tamil Nadu?
The some of the famous scientists from Tamil Nadu are Dr. M.S. Swaminathan, Srinivasa Ramanujan, Venkataraman Radhakrishnan , Dr. A.P.J. Abdul Kalam and Sir. C.V. Raman.
1. Write about different household wastes.
Some of the household waste are Organic wastes: Kitchen wastes, Vegetables, Flowers, Leaves, Fruits.
Toxic wastes: Old medicines, Paints, chemicals, Bulbs, Spray cans, Fertilizers, Pesticide containers, Batteries, Shoe polish.
Recyclable wastes: Paper, Glass, Metals, Plastics.
Solid wastes: Cloths soiled with blood and other body fluids.
e-wastes: Computer parts, Electronic materials, Cell phone parts, CFL bulbs.
2. Explain the need for waste disposal
Waste management is needed for the following reasons.
To control pollution
Various pollutions like water pollution, air pollution and soil pollution can be avoided.
To conserve natural resources
Waste disposal is important for the conservation of our environmental resources like forest, minerals and water.
To control spread of diseases
Spread of infectious diseases can be controlled.
Recycle for further use
Wastes can be recycled to get products for further use.
3. How can you reduce wastes in your school environment?
The following practices will be helpful to reduce wastes in our home and school environment.
Use reusable and recyclable bags and containers.
Avoid one time use items and use items which can be used permanently.
Segregate wastes into bio-degradable and non-biodegradable items and hand over them to the municipal and corporation people who collect them.
Do not throw away your wastes everywhere. Put them in dustbins and dispose them properly.
Don‛t waste food. Waste food in schools can be collected and used to feed cattles.
Organic wastes can be converted into manures.
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