Frank Cce Everyday Science Solutions for Class 8 Science Chapter 23 Summative Assessment 1 are provided here with simple step-by-step explanations. These solutions for Summative Assessment 1 are extremely popular among class 8 students for Science Summative 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 23 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 8 Science are prepared by experts and are 100% accurate.

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A seed drill is used for sowing seeds.

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Cold storage would be best method to preserve leafy vegetables.

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Mercury and gallium are two metals that are found in liquid state.
Note: gallium is liquid at room temperature, it becomes a solid below room temperature.

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CNG is compressed natural gas. It is used as a fuel for transport vehicles and power generation.

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Fuels that can be used in their natural state (i.e., as found in nature) are called natural or primary fuels. Examples are wood, natural gas, coal, crop residue and animal dung cake.

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Sambar and musk deer are two vulnerable species that are gradually decreasing in their number but are still in sufficient numbers in their natural habitat.

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RNA and DNA are nucleic acids present in all the cells of living organisms.

RNA: RNA or ribose nucleic acid participates in protein synthesis and DNA replication. In some animals it is the hereditary molecule.
DNA: DNA or deoxyribonucleic acid is a hereditary molecule that is involved in the transfer of parental traits to the progeny. Chromosome are composed of DNA.

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A fertilised egg or zygote undergoes repeated division to produce an embryo.

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Two functions of soil:
(1) It provides the structural and functional base for growth of most plants including crops.
(2) It is important for nutrient cycling in nature.

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Materials that cannot be decomposed into simpler compounds by microorganisms are called non-biodegradable materials. For example, plastics.

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Fuels formed by the decomposition of plants and animals that got buried deep inside the earth during prehistoric times are called fossil fuel. It is formed due to high pressure and temperature inside the earth under anaerobic conditions. Examples are coal, petroleum and natural gas.

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There are several reasons why people go for hunting. A few of these reasons are:

(1) People hunt animals for food, especially fresh meat of wild animals such as deer.
(2) Hunting is also considered a sport and a source of self-entertainment.
(3) People also hunt animals to obtain animal products such as ivory, skin and fur, which have high monetary value in the market.
(4) There are myths associated with certain animal products. For example, rhino's horn and tiger's bones are believed to have medicinal values. So, these animals are hunted for their body parts.

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Metamorphosis can be defined as a series of changes through which a larva gets transformed into an adult. Metamorphosis takes place in insects and some animals such as frogs.

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A seed drill is used for sowing seed. It consists of tubes of iron, and a funnel is fitted at the top, which is joined to the plough. Furrows are made by ploughing the soil and seeds are added to soil furrows through this funnel.

A seed drill is more beneficial compared to traditional methods of sowing seeds because of the following reasons:

• It sows seeds at an appropriate depth in the soil.

• Seeds that are sown at an appropriate depth cannot be picked up by birds.

• Seeds sown in proper rows result in uniform growth and reduce overcrowding; thus, all plants get sufficient nutrients, water and sunlight.

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All metals do not have same reactivity. Some metals are highly reactive, while other may be moderate.Metals such as gold and platinum are almost inert.
Depending upon their reactivity, some metals can replace hydrogen from acids while others cannot.
Metals such as sodium, zinc, iron and magnesium are highly reactive and can replace hydrogen from the acids. For example:
Sodium + Hydrochloric acid → Sodium chloride + Hydrogen

On the other hand, noble metals such as gold and silver are less reactive or do not react with acids and cannot replace hydrogen from acids. Thus, they cannot react with acids.

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Wildlife is important for the maintenance of environment in many ways:

1. Wildlife is a major part of ecosystem. Different species of plants and animals form important linkages in various ecosystems. For example, tiger occupies the top level of food chain. It keeps the population of herbivores in control, and thus prevents overgrazing of forests.

2. Wild plants keep the air clean by performing photosynthesis and supplying oxygen to the air.

3. Deforestation leads to the environmental pollution and desertification, which, in turn,  is harmful for human beings.

Thus, we can say that wildlife keeps the balance of environment maintained and is important for the normal functioning of various ecosystems. 

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Chromosomes are the thread-like structures present in the nucleus of a cell. They are composed of DNA that carries genes, i.e. the structures responsible for heredity. Thus, chromosomes are responsible for transferring the traits of parents to the progeny.



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