Nutrition in Animals — Science STD 7 — Question

The shadow of a ball is formed on a wall by placing the ball in front of a fixed torch as shown in Fig. In scenario (i) the ball is closer to the torch, while in scenario (ii) the ball is closer to the wall. Choose the most accurate representation of the shadows formed in both scenarios from the options provided (a and b).

'A' got her gall bladder removed surgically as she was diagnosed with stones in her gall bladder. After the surgery, she faced problems in digestion of certain food items, when consumed in bulk. Can you tell which kind of food items would they be and why?

In figure, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the labels clouds, rain, atmosphere, carbon dioxide, oxygen, plant, animal, soll, roots, water table.

Explain the reason for the shiny reflectors of room heaters.

Which gas present in air is essential for aerobic respiration? What is the role of oxygen during respiration?

Why is neutralisation useful in everyday life?

Why are metals like copper used for making electric wires?

On last Monday, Pankaj was dealing immense cough and cold. Besides this, he was suffering from a great headache. So, he decided to take a leave on that day so that he could take some rest at his home. After one hour he thought to check his fever through a clinical thermometer, so before using it, he washed it and started shaking it very fastly in his hand, so that the mercury level of thermometer gets reduced. At the same time, his elder brother Vishwas scold him and suggested him to shake the thermometer slowly.

1. State some precautionary measures while checking the fever through a clinical thermometer.
2. Mention the values showed by the elder brother of Pankaj (i.e. Vishwas).

Write the use of odometer in the vehicle.