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Yogita Ingle 7 years, 4 months ago
An ordinary glass tumbler cracks when very hot water is poured into it because as glass is not a good conductor of heat,the heat particles move slowly and unevenly causing the glass molecules to break apart.We see this as the glass cracking and breaking apart.
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Yogita Ingle 7 years, 4 months ago
Biotic components are the ones which include all living beings in a habitat where as various non-living things of the habitat constitute abiotic components. Examples of Biotic components- plants, microorganisms, animals etc.
Abiotic components are important to us as these help us to grow and maintain the life of all living beings. For example – plants need water, light, heat for growth.
Posted by Sumit Kumar 7 years, 4 months ago
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Meghna Thapar 6 years ago
- A magnet is an object which attracts things made of iron, steel, nickel and cobalt.
- The pieces of magnetite rock are known as natural magnets.
- Those materials which are attracted by a magnet are called magnetic materials.
- Those materials which are not attracted by a magnet are called non-magnetic materials.
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Meghna Thapar 6 years ago
Droughts happen when rain insufficiency hits a place for a long period of time, hence causing an acute water shortage.
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The major nutrients that are in our food:
- Minerals
- Water
- Vitamins
- Fat
- Protein
- Carbohydrates
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Yogita Ingle 7 years, 4 months ago
Physical changes: When no new substance is formed after the change, it is called physical change. Physical changes are usually reversible. Examples: Melting of ice, melting of wax, etc.
Chemical changes: When a new substance is formed after the change, it is called chemical change. Chemical changes cannot be reversed by simple physical means. Many chemical changes are irreversible. Examples: Burning of candle, rusting of iron, etc.
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Yogita Ingle 7 years, 4 months ago
Following are the main parts of a flower:
Sepal: The outer green leafy structure in a flower is called sepal. Petals make the first whorl of a flower. This whorl is called calyx. It protects the flower at bud stage.
Petals: The coloured leaf-like structures; next to the sepals; are called petals. The bright colours of the petals, attracts insects. This helps the plants in reproduction. The whorl formed by the petals is called corolla.
Stamens: Around the centre of the flower there are many little stalks with swollen tops. These are called Stamen. It is the male part of the flower. Each stamen consists of a green stalk called filament. A capsule-like structure; called anther is at the top of the stamen. The anther produces pollen grains. Pollen grains are powder like particles and take part in reproduction.
Pistil: It is the female part of the flower. It is a flask- shaped structure in the middle of the flower. It is divided into three parts.
- Ovary: The lower broader portion of the pistil is called ovary. It contains the ovules which take part in reproduction.
- Style: The narrow middle portion of the pistil is called style.
- Stigma: The sticky end at the top of the style is called stigma.


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Yogita Ingle 7 years, 4 months ago
Birds are arboreal in habit. Birds exhibit two types of locomotion.
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