Question

1).Why is the colour used in map?
answer in details
2)why our earth is a unique planet
3.)what chemical changes and physical changes and give examples.
i want spam free copied answer will be reported.
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Answer 1

1. Map detail includes important information about elevation, water, structures, trails, ground cover and roads; and much more. Colors stand out from the map and provide identification to many features such as vegetation and water. Colors represent natural and man-made features of the earth.

2.To enable life, this most special of attributes, planet Earth has a number of ideal features. It is unique among planets in our solar system for having water in its liquid form at the surface, in an amount conducive to life evolving

3.Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction

Answer 2

☀$\sf\large\underline\blue{Question:}$

Why colour is used in map?

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Colour is used in map because it give the map a good look and also provide definite information. Different colours are used to indicate specific features on the map. For example

Black indicates cultural features like buildings road railway line etc, blue indicates water features like sea rivers and so on, green indicates forest or grassland, brown indicates mountain and hill red indicates major highways road ways urban areas airport and so on, yellow indicates built up areas.

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Why our earth is called a unique planet?

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Our earth is a unique planet because it is the only planet in the solar system where life is known to exist. can you say why? This is because the earth has all favourable condition required for the existence of life.

Some additional information about it:]

The earth is the fifth largest planet and the third nearest to the sun. It is a spherical in shape slightly flattened at the poles and bulging at the equator. The shape of the earth is also described as a geiod.

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What is physical changes and chemical changes?

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☀$\sf\large\underline\purple{Physical\:change:}$

The changes in which involves the appearance of the substance. In this changes no new substance is formed. Sometimes in this changes loss their original property for sometimes but it is reversed for eg melting of ice.]

☀$\sf\large\underline\blue{Chemical\: changes:}$

The changes in which the substance loss their properties because it can't be reversed for eg. burning of wood. In this changes new substance formed. It is also called irreversible changes.