Question

2. Propagation of ginger is generally done using-
(a) seed (c) root
(b) stem (d) leaf
3. The term used for the process of separation of grains from chaff
Is-
(a) sieving (c) winnowing
(b) threshing (d) hand picking
4. Read the statements given below.
(a) Seeds require moisture for germination.
(b) Plants can absorb nutrients mostly in dissolved form.
(c) Irrigation protects cropsfrom both frost and hot air currents.
(d) Irrigation improves soil texture.
Choose the combination of statements which indicate the need to irrigate
crops.
(a) i and ii (b) i, ii, iii
(c) i, ii, iii, iv (d) i and iii
5. Which of the following is not true for fertilisers?
(a) They increase the yield.
(b) Their excessive use disturbs the balance of nutrients in soil.
(c) They are generally used in small quantity.
(d) They are environment friendly.
6. The process of loosening and turning of soil is called-
(a) irrigation and manuring (c) tilling and ploughing
(b) digging and winnowing (d) harvesting and storage
5
7. Given below are statements about the harmful effects of weeds on crop plants.
(i) They interfere in harvesting.
(ii) They help crop plants to grow healthily.
(iii) They compete with crop plants for water, nutrients, space and light.
(iv) They affect plant growth.
Choose the correct combination of statements.
(a) i, iii, iv (c) iii, iv
(b) iii only (d) i, ii, iii, iv

Answer 1

Answer:

Candidates can download NCERT Exemplar Class 8 Science Unit 1 from this page. The exemplar has been provided by the National Council of Educational Research & Training (NCERT) and the candidates can check it from below for free of cost. It contains objective, very short answer type, short answer type, and long answer type questions. Along with it, the answer for each question has also been provided. From the NCERT Exemplar Class 8 Science Unit 1, candidates can understand the level and type of questions that are asked in the exam.

Answer 2

Answer:Root , winnowing , a c and d , they are environmental friendly , irrigation and manuring , i iii iv

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