Biology Revision Worksheet

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GRADE 8 BIOLOGY REVISION WORKSHEET
a) Name the following:
i) The process by which raisins swell up when placed in a beaker of water. ii) Non-infectious disease arising due to hypersensitiveness of an individual to a particular sustance. iii) Bone forming cells. iv) Diseases caused due to malfunctioning of organs like heart, pancreas, eyes etc..
v) The lubricating fluid between the bones in a joint.
b) Complete the following table by filling in 1 to 11. Diseases | Causative organism | Symptoms | Vector, if any | Control measures | Dengue | 1. | 2. | Aedes aegypti | 3. | Polio | 4. | Limbs become paralysed and the person becomes crippled. | | 5. | 6. | Salmonella typhi | 7. | | 8. | Rabies | 9. | 10 | | 11. |
c) Match the items in column I with those in column II.
Column I Column II
i) Kwashiorkar affects children below one year ii) Marasmus deficiency of Vitamin B1 iii) Beri-beri deficiency of vitamin K iv) Haemorrhage caused due to weaning of breast milk
v) Thalassemia deficiency of vitamin D vi) Rickets genetic disease
d) Give a scientific reason for the following: i) Terrace farming prevents soil erosion. iii) Blood circulation in man is called as double blood circulation. iv) Elbow is an example of hinge joint.
v) Numerous root hairs are present behind the tip of the root.
e) Given below is an example of a bone and its location. Example:

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