Study the given Venn diagram.
Which of the following best represents points 1, 2 and 3?
|A||Rusting of iron||Bursting of crackers||Curdling of milk|
|B||Burning of LPG in kitchen||Inflating a tyre||Cutting of trees|
|C||Germination of seeds||Melting of butter||Burning of paper|
|D||Burning of kerosene stove||Bursting of balloon||Ripening of fruits|
how bursting of balloon is a fast change???
Why is the Sun important to the Earth?
1. It provides light energy to green plants to make food.
2. It provides heat to enable living things to survive on Earth.
3. It rotates around the Earth to give us seasons.
A 1 and 2 only
B 1 and 3 only
C 2 and 3 only
D 1, 2 and 3
The correct is A .
________, ________ and ________ are the sources of energy which will never finish. Select the correct sequence of words to fill the given blanks.
(a) Oil, coal and wood
(b) Petrol, diesel and LPG
(c) Sun, wind and water
(d) Sun, fossil fuels and wind
c is the correct answer
Refer to the given flow chart.
X and Y and select
the correct option
A Glands secreting hormone Y are located on the posterior surface of glands secreting hormone X.
B Myxoedema is caused by hyposecretion of a hormone secreted by gland that also secretes hormone Y.
C Both hormones X and Y are secreted by same endocrine gland but are antagonistic to each other in functioning.
D Hyposecretion of hormone Y leads to osteoporosis as more calcium is drawn from bones to raise blood calcium level.
An echo repeats two syllables. A single syllable takes about 1/5th of a second to utter. If the velocity of sound is 330 m s–1, then the distance of the reflecting surface is
A 66.0 m
B 33.0 m
C 99.0 m
D 16.5 m