Components of Food — Science STD 6 — Question

Answer the following questions.

1. List all those components of food that provide nutrients.
2. Mention two components of food that do not provide nutrients.

Activity.Take two glasses and pour half a cup of water in each of them. Add a teaspoon of salt to one glass and stir till the salt dissolves. Go on adding salt, one teaspoon at a time, till the solution saturates. Record the number of spoons of salt that dissolved in the water, in Table. Now, repeat the same activity with sugar. Repeat this with some other substances that are soluble in water.
What do you notice from Table? Do you find that water dissolves different substances in different amounts?

List any five objects and write the names of materials they are made up of.

Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.

What is a shadow? How is it formed? How does the colour of an opaque object affect the colour of the shadow?

Which of the following changes cannot be reversed?

1. Blowing of a balloon.
2. Folding a paper to make a toy aeroplane.
3. Rolling a ball of dough to make roti.
4. Baking cake in an oven.
5. Drying a wet cloth.
6. Making biogas from cow dung.
7. Burning of a candle.

The seat of a two-wheeler parked on a sunny day has become very hot. How can you cool it down?

On what basis are the various objects grouped?

A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements
Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles, cylinders.

1. The makes the windmill rotate.
2. Air is a of some gases.
3. A weather cock shows the in which the air is moving at that place.
4. Mountaineers carry oxygen with them, while climbing high mountains.

Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?