1. Various factors like, temperature, humidity, air pressure, wind speed, wind direction, cloud cover, sunshine etc. are called the elements of the weather.

    Various factors like, temperature, humidity, air pressure, wind speed, wind direction, cloud cover, sunshine etc. are called the elements of the weather.

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  2. The reaction between baking soda and lemon juice is a chemical change because (i) a new substance— a gas, carbon dioxide is formed. (ii) the reaction is irreversible.

    The reaction between baking soda and lemon juice is a chemical change because
    (i) a new substance— a gas, carbon dioxide is formed.
    (ii) the reaction is irreversible.

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  3. (a) The maximum temperature of the day is usually recorded in the afternoon. (b) The minimum temperature of the day is usually recorded in the early morning.

    (a) The maximum temperature of the day is usually recorded in the afternoon.
    (b) The minimum temperature of the day is usually recorded in the early morning.

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