Grade-8 Podar International School,Gandhinagar

PODAR INTERNATIONAL SCHOOL Practice Sheet – 2 (2017-18) Grade: VIII Subject: Science Answer Scheme Duration: 1 ½ hours 1 mark questions 1. What is harvesting? ans. The cutting and gathering of crops after they have matured is called harvesting. (Ch 1: Food Sources and Us, pg 9) 2. Which plant tissue is responsible for increase in the length of the plant? ans. Apical meristems / terminal meristems (Ch 3: Tissues: Cells in Unison, pg 33) 2 mark questions 3. Give reasons for the following. (a) The use of fertilisers should be controlled. ans. The use of fertilisers should be controlled as they can harm the environment. (Ch 1: Food Sources and Us, pg 5) (b) Lysosomes are known as suicidal bags. ans. Lysosomes contain substances that help in the digestion of foreign bodies and worn out cell parts. (Ch 2: Cells- The building blocks of life, pg 21) 4. (a) What is the relation between pressure exerted by liquids and its depth? ans. The pressure exerted b