CBSE (Central Board of Secondary Education) Class-8 Science: Questions 9 - 15 of 465
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Question 9
Question MCQ▾
Weedicides is the process of
Choices
Choice (4) | Response | |
---|---|---|
a. | Uprooting the weeds manually | |
b. | Remove weeds by spraying of chemicals | |
c. | Removing weeds by use of harrows spades or trowels (Khurpa) | |
d. | Removing weeds by biological method |
Question 10
Question MCQ▾
The process of removing chaff from the threshed grain is called
Choices
Choice (4) | Response | |
---|---|---|
a. | Weeding | |
b. | Threshing | |
c. | Winnowing | |
d. | Harvesting |
Question 11
Question MCQ▾
Algae that increases the soil fertility is
Choices
Choice (4) | Response | |
---|---|---|
a. | Kelps | |
b. | Real Algae | |
c. | Nostoc and Anabaena | |
d. | Diatoms |
Question 12
Question MCQ▾
Micro-organisms decompose organic waste such as
Choices
Choice (4) | Response | |
---|---|---|
a. | Cheese, pickles | |
b. | Vegetable peels, plants and animal waste | |
c. | Medicines | |
d. | Vaccines |
Question 13
Question MCQ▾
Bacteria which causes the food poisoning is:
Choices
Choice (4) | Response | |
---|---|---|
a. | Escherichia coli | |
b. | Salmonella and Staphylococcus | |
c. | Spirilla | |
d. | Peneumococcus |
Question 14
Question MCQ▾
Name the tool used for making soil soft for penetration of roots
Choices
Choice (4) | Response | |
---|---|---|
a. | Hoe | |
b. | Ploughshare | |
c. | wooden plank | |
d. | All of the above |
Question 15
Question MCQ▾
The term Protozoa means:
Choices
Choice (4) | Response | |
---|---|---|
a. | The most primitive and simplest animal | |
b. | Disease causing agents | |
c. | The disease causing micro-organisms | |
d. | Organisms which are the carriers of parasite |