Subject Experts Solutions for Chapter: Half Yearly Examination Test Paper-1, Exercise 1: Half Yearly Examination Test Paper-1

Give reason for the following:
A clinical thermometer has a range of $35°\mathrm{C}$ to $45°\mathrm{C}$ only.

What is sea breeze? How is it set up?

Explain the following:

b) Bubbles are produced when acetic acid is added to a solution of sodium hydrogen carbonate.

A student took a solution of copper sulphate in a beaker and put an iron nail in it and left it for about an hour.

Are these changes chemical in nature?

A student took a solution of copper sulphate in a beaker and put an iron nail in it and left it for about an hour.

Write a word equation for the chemical change, if any.

Give reasons

b) Loam is best suited for plant growth.

What are mutually beneficial associations also knows as? Why are such associations of great significance to the farmer? 

a) Name the carbohydrate present in grass and where is it digested in ruminants?

b) Draw and label the digestive system of a ruminant (4 labels)