Frank Cce Everyday Science Solutions for Class 8 Science Chapter 19 Formative Assessment 1 are provided here with simple step-by-step explanations. These solutions for Formative Assessment 1 are extremely popular among Class 8 students for Science Formative Assessment 1 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 8 Science Chapter 19 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 8 Science are prepared by experts and are 100% accurate.

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(b) weeding

A harrow is used for manual weeding.

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(a) fungus

Penicillin is obtained from Penicillium notatum, which is a fungus.

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(c) both (a) and (b)

Nylon is a synthetic fibre that resembles both silk and wool.

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(b) marijuana

Hemp fibre is obtained from the marijuana plant.

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(a) Digboi

The oldest oil refinery in India is located at Digboi.

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1. Agriculture is the art of growing fruits and vegetable.
2. Scientists who study microorganisms are called microbiologists.
3. A polymer is made by joining together thousands of monomers.
4. Non-metals have low tensile strength.
5. Petroleum is also called black gold.

Page No 80:

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Column A Column B
1. Crumbs (b) Big mud pieces
2. Aspergillosis (d) Fungi
3. Cashmilon (a) Acrylic
4. Nylon (e) New York + London
5. Bitumen (c) Paints

Page No 80:

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1. False
Groundnut is a kharif crop.

2. True

3. False
We get linen fibre from the stem of flax plant.

4. True

5. False
Crude oil is the mixture of several solid, liquid and gaseous hydrocarbons mixed with water, salt and other particles.



Page No 81:

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1. The process of separating grains from the harvested stalks of hay: Threshing
2. The process of separating grains from the chaff: Winnowing
3. The process of exposing food material to high energy radiations: Food irradiation
4. Fixation of nitrogen by the bacteria and algae: Nitrogen fixation
5. The process of breaking down of sugar into an acid or alcohol by microbes: Fermentation
6. The process of linking a large number of monomer to form polymers: Polymerisation
7. The ability of a metal to be beaten into sheets: Malleability
8. The property by which a metal can be drawn into wires: Ductility
9. The process of isolating useful fractions from petroleum: Refining of petroleum
10. The slow chemical process of the conversion of wood into coal: Carbonisation

Page No 81:

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To protect crops from pests and diseases, pesticides and fungicides are used.

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Bacteria perform nitrification and nitrogen fixation, which provide nitrogen to the plants. As a result, farmers do not have to spend much on fertilisers. Hence, bacteria have economic importance in agriculture.

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Aluminium is used for making electrical transmission wires because being a metal it is a good conductor of electricity and can be drawn into wires because of its ductility.

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Refining of petroleum is the process used to separate the components of petroleum and the method used is fractional distillation.

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Manure Fertiliser
It is a natural substance obtained by decomposition of animal wastes and plant residues. It is a man-made substance, and is generally an inorganic salt or organic compound.
It has a low nutrient content. It has a high nutrient content.
It is rich in organic matter and adds humus to the soil. It is rich in inorganic matter and does not contain humus.
It is not soluble in water and hence is absorbed slowly by the plants. It is soluble in water and is readily absorbed by the plants.
It is cheaper. It is expensive.

Page No 81:

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Algae Fungi
They are autotrophic. They are either saprotrophic or parasitic.
They are found in both fresh water and sea water. They are found in dark, warm and moist places.
They contain chlorophyll. They lack chlorophyll.
They do not act as decomposers. Saprophytic fungi act as decomposers.

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Following are the five steps to reduce the danger of plastic pollution:
1. Reduce the use of plastic bags and other plastic material.
2. Reuse plastic bags by keeping them clean.
3. Recycle thermoplastic goods for reuse.
4. Use biodegradable plastic products.
5. Follow and practise the 4-R principle of reuse, reduce, recycle and recover to minimise environmental pollution.

Page No 81:

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Coal is formed at high temperature and pressure by the decomposition process of plants and trees that were buried under the earth hundreds of years ago. The process of formation of coal from wood is called carbonisation. Due to volcanic activities, earthquake and flood, forests got buried under the surface of the earth and were covered with clay, sand and water. With the gradual process of carbonisation, the buried wood converted into coal.



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