Science Quiz Class 7
Congratulations - you have completed %%Science Quiz%%. You scored %%SCORE%% out of %%TOTAL%%.
Your answers are highlighted below.
From which part of the plant does maximum loss of water through transpiration take place?
Question 1 Explanation:
Transpiration takes place through the stomata which are present on the leaves of the plants and delicate organs, is called stomatal transpiration. The maximum amount of water is lost by this transpiration. About 80% to 90% transpiration occurs through the stomata.
Which of these can respire in the absence of oxygen
Question 2 Explanation:
Organisms which can respire in the absence of oxygen are known as anaerobes. The process of respiring in the absence of oxygen is known as anaerobic respiration.
Identify the plant part that does not help in respiration.
Question 3 Explanation:
Unlike animals and humans, plants do not have any specialized structures for gaseous exchange but they have stomata (present in leaves) and lenticels (present in stems) which are involved in the exchange of gases. Compared to animals and humans, plant roots, stems, and leaves respire at a very lower rate.
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed
Yellow in both acid and base
Red in acid and blue in base
Yellow in acid and red in base
Pink in acid and yellow in base
Question 4 Explanation:
Turmeric is a natural indicator. On adding its paste to acid and base separately it gives Yellow in acid and red in base.
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
Question 5 Explanation:
Plants do not grow well when the soil is either too acidic or too basic. If the soil is basic, organic matter is added to it. Organic matter releases acids which neutralise the excess bases present in the soil and reduces its basic nature.
Which of the following set of substances contain acids?
Grapes, lime water
Curd, milk of magnesia
Question 6 Explanation:
Curd contains lactic acid and vinegar contains acetic acid.
Products of a neutralisation reaction are always
an acid and a base
an acid and a salt
a salt and water
a salt and a base
Question 7 Explanation:
Neutralization is the reaction of an acid and a base, which forms water and a salt.
The normal temperature of human body is
37 degree Celsius
37 degree Fahrenheit
27 degree Celsius
Question 8 Explanation:
The normal temperature of human body is 37 degree Celsius.
Conduction takes place only in
Solid, Gas, Liquid
Question 9 Explanation:
Conduction takes place only in Solid.
What is the SI unit of pressure
Question 10 Explanation:
For pressure, the SI system's basic unit is Pascal
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 10 questions to complete.