Frank Cce Everyday Science Solutions for Class 6 Science Chapter 22 Summative Assessment 2 are provided here with simple step-by-step explanations. These solutions for Summative Assessment 2 are extremely popular among Class 6 students for Science Summative Assessment 2 Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Frank Cce Everyday Science Book of Class 6 Science Chapter 22 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Frank Cce Everyday Science Solutions. All Frank Cce Everyday Science Solutions for class Class 6 Science are prepared by experts and are 100% accurate.

Page No 220:

Question A.1:

Why should we not burn agricultural waste?

Answer:

The burning of agricultural waste produces smoke and gases that are harmful to us. It also brings down the soil quality. Hence, we should not burn agricultural waste. 

Page No 220:

Question A.2:

How is greenhouse effect useful for us?

Answer:

The greenhouse effect maintains the temperature of the earth. Greenhouse gases such as, carbon dioxide keeps the earth moderately warm through the greenhouse effect and help to sustain favourable conditions for life on the earth. Hence, the greenhouse effect is useful to us.

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Question A.3:

Are images same as shadows?

Answer:

No, images are not the same as shadows. A shadow is formed when the path of light is obstructed by an opaque object. An image is formed as a result of the reflection of light from a polished surface, such as a mirror.  

Page No 220:

Question A.4:

What is an electric circuit?

Answer:

An electrical circuit can be defined as a closed path through which an electric current can flow. Various components, such as a battery, resistor, wire, key and bulb, can be connected in different ways to construct an electrical circuit.

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Question A.5:

Why is magnet called dipole?

Answer:

The poles of a magnet always exist in pairs and cannot be separated. Hence, a magnet is also called a dipole.

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Question A.6:

Why is sea water salty?

Answer:

Sea water is made up of a large percentage of dissolved salts, the chief constituent being common salt. Owing to the presence of salt, sea water tastes salty. 

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Question A.7:

Define landfilling.

Answer:

Landfilling is a method of management of non-biodegradable waste by which waste is dumped in low-lying land in order to reclaim the land. These sites, called landfills, are then covered with a layer of soil. With the passage of time, landfills are converted into construction sites, parks or playgrounds.

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Question A.8:

Give two examples of biodegradable waste.

Answer:

Two examples of biodegradable waste:
1. Fruit and vegetable peels
2. Cow dung

Page No 220:

Question B.1:

What is the source of electric current?

Answer:

1. A cell is a source of electric current. The chemicals stored in a cell produce electricity; that is, chemical energy changes into electrical energy. A cell consists of two terminals: a positive terminal and a negative terminal. However, a cell cannot provide energy of high magnitude.

2. Another source of electricity are big powerhouses, which produce a large amount of energy using the kinetic energy of water or thermal energy of coal.

Page No 220:

Question B.2:

How does little or no vegetation affect groundwater level?

Answer:

Vegetation keeps the groundwater level high, because the roots of plants absorb water and do not allow water to percolate to the deep layers of the soil. If vegetation is removed, there are no roots to absorb water, and hence, the groundwater level will fall.  

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Question B.3:

What will you do to conserve water at home?

Answer:

We can take the following steps to conserve water at home:
1. Use water judiciously for various activities
2. Use water-harvesting techniques, such as collection and use of rainwater
3. Take shorter showers
4. Ensure that taps, water pipes and joints do not leak
5. Avoid letting the water run from taps while washing hands, brushing and shaving

Page No 220:

Question B.4:

Distinguish between periodic motion and repetitive motion.

Answer:

Periodic motion Repetitive motion
Periodic motion is a type of motion that repeats itself in regular intervals of time. Repetitive motion is a type of motion that occurs again and again.
All types of periodic motion are repetitive. All types of repetitive motion are not periodic.

Page No 220:

Question B.5:

Write two demerits of using plastics.

Answer:

Two demerits of using plastics are as follows.
1. Plastic bags often choke drains, which causes an overflow of wastewater.
2. When thrown around, plastic materials destroy the natural beauty of a place.

Page No 220:

Question C.1:

Differentiate between aquatic adaptation and volant adaptation.

Answer:

Aquatic adaptations Volant adaptations
Aquatic adaptations allow aquatic animals to survive in water. Volant adaptations allow animals to lead an aerial life.
Fish, whales and dolphins have aquatic adaptations. Birds and bats have volant adaptations.
The body of a fish is compressed laterally to reduce friction and allow it swift passage in the water while swimming. Its fins help it swim. Volant animals have forelimbs that are modified into wings for flying in the air. Bones have air cavities to make the body light.  

Page No 220:

Question C.2:

Give a brief description of the process of recycling of paper.

Answer:

Some ways of recycling paper are given below.
(a) Making fresh paper from old newspapers
(b) Reusing envelopes and covers by using stickers to write addresses
(c) Making new notebooks from unused pages of old notebooks

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Question C.3:

State the characteristics of a magnet. Name the poles of a magnet. Can they be isolated?

Answer:

The characteristics of magnets are as follows.
1. Each magnet has two poles: the north pole and the south pole.
2. A magnet always points in the north-south direction when suspended freely.
3. Like poles of magnets repel each other, and unlike poles attract each other.
4. Magnetic poles always exist in pairs. The poles of a magnet cannot be separated.

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Question C.4:

What is composting and how is this technique useful to a farmer?

Answer:

Recycling organic wastes, such as vegetable peels, waste food and leaves, by burying them in compost pits is called composting. It is a simple and effortless method of recycling organic wastes. Biodegradable wastes are degraded by small micro-organisms, such as bacteria and fungi. Compost is an excellent manure for use by farmers. Hence, composting is useful to them.

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Question C.5:

Why does lime water turns milky when we breathe into it?

Answer:

Lime water turns milky when we breathe into it because we exhale carbon dioxide, which reacts with lime water to form calcium carbonate. Calcium carbonate is milky in appearance. The equation for the process is as follows.
 
Ca(OH)2 +CO2 CaCO3   +H2OLime                     Calciumwater                    carbonate (milky)         



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