Class III Science 1. Food and Feeding Habits of Animals

Chapter 1

Food and Feeding Habits of Animals

F. Answer these questions. 

Que 1.  All animals depend on plants for their food. How?

Ans - All animals depend on plants for their food because all food chains begin from plants.

Que 2. Name different types of food that omnivores get from animals.  

Ans - Milk, Eggs, Fish and Meat.

Que 3. Why do cows and goats need to be fed on grass and oilseed-cakes?

Ans - Animals like cows and goats need to be fed on grass and oilseed-cakes because these are milk producing food.  

Que 4. How does an earthworm have its food?

Ans - An earthworm swallows soil which has parts of dead plants and animals.

Que 5. Why should we take care of domestic animals?

Ans - Domestic animals serve us well if we take good care of them.

G. Think and answer.

1.  Does a frog need teeth? Why? Why not?

Ans - A frog does not need teeth because it swallows it food whole. It does not bite or chew its food.

2. A dog has sharp and pointed front teeth. Why?

Ans - A dog has sharp and pointed front teeth to tear flesh.

3. A pet dog is usually healthier than a stray dog. Give reasons.

Ans- A pet dog is healthier than stray dog because their shelters are cleaned regularly. They are given food and water in clean vessels.

Workbook Class 6 Science Chapter 16 Garbage In, Garbage out

Chapter 16

Garbage In, Garbage Out

Exercise

I. Answer the following questions in brief:

Ans 1 - can be converted: (a) dry leaves (b) vegetable and fruit

can't be converted: (a) plastic (b) aluminum foil

Ans 2 - Vegetable waste, green leaves, husk is type given to red worms.

Ans 3 - Food that contain salt, pickle, oil, vinegar, meat and milk should not be given to red worms. If you put these things disease - causing small organisms start growing these things disease - causing small organisms start growing. 

Ans 4 - Red worms do not have teeth. They have a structure called 'gizzard' which helps them in grinding their food. 

Ans 5 - Red worms do not have teeth. They have a structure called 'gizzard' which helps them in grinding their food.

Ans 6 - They also need moisture around them. If you take good care of your worms, in a month's time their number will double.

Ans 7 - A paste made of clay paper and rice husk.

Ans 8 - Burning of these produces smoke and gases that are harmful to our health.

Ans 9 - We should not be burnt plastics because it is hazardous to environment and may cause many health problems, including cancers in humans. Plastic should be sent for recycling agencies.

Ans 10 - We should not throw garbage in plastic bags as stray animals look for food in these bags, they end up swallowing these. Sometimes, they die due to this. 

Ans 11 - Plastic bags thrown carelessly cause problems. As a result, drain get choked and the water spills on the roads.

Workbook Class 6 Science Chapter 15 Air Around Us

Chapter 15

Air Around Us

Exercise

I. Answer the following questions in brief:

Ans 1 - 99.2%

Ans 2 - Carbon-Di-oxide

Ans 3 - Those are the dust particles in the air.

Ans 4 - Fine hair and mucus present in our nostrils to prevent dust particles from getting into the respiratory system.

Ans 5 - We should not breathe through our month because harmful dust particles may enter your body.  

Ans 6 - Because when they climb mountains,  as altitude increases, the amount of oxygen level in the atmosphere air decreases. As a result, mountaineers suffer from dizziness.  

Ans 7 - Animals like earthworms living in the soil come out of the soil when it rains heavily because rainwater fills in their burrows and in order to respire they come out of the soil. 

Ans 8 - (a) The windmills is used to draw water from tube wells. 

(b) Windmills are clean and green sources of power.

Workbook Class 6 Science Chapter 14 Water

Chapter 14

Water 

Exercise

I. Answer the following questions in brief:

Ans 1 - In the water cycle, evaporation occurs when sunlight warms the surface of the water.

Ans 2 - In the sunlight, because the temperature in the sunny area is higher than the shade and evaporation takes place at a faster rate at high temperature.

Ans 3 - Plant lose gallons of water every day through the process of transpiration.

Ans 4 - The basic idea behind rainwater harvesting is to catch water where it falls on the Earth's surface.

Ans 5 - Most of our groundwater come from rainfall. 

Ans 6 - Pumping water out of the ground faster than it is replenished over the long - term causes similar problem  Groundwater depletion is caused by sustained groundwater pumping.

Ans 7 - Rainwater harvesting involves the process of diverting rainwater from surfaces to tanks or into the ground, for use at a later stage. By using harvesting rainwater, housing complex and individual households can reduce their dependence on municipal water supply.

Workbook Class 6 Science Chapter 13 Fun with Magnet

Chapter 13

Fun with Magnet

Exercise

Answer the following questions in brief:

Ans 1 (a) Iron, (b) Cobalt

Ans 2 Magnet , A piece of iron.

Ans 3 Iron

Ans 4 No, If we continue to split the magnet we will eventually get down to an iron atom with a north pole and south pole.

Ans 5 (a) Bar magnet   (b) Cylindrical magnet (c) Horse-shoe magnet (d) Ring magnet

Ans 6 (a) Iron - Iron is an extremely well known ferromagnetic

(b) Nickel - Nickel is another popular magnetic metal with ferromagnetic properties. 

(c) Cobalt - Cobalt is an important ferromagnetic material 

Ans 7 Repulsion is the sure test for magnetism because it takes place only between two like poles of magnet whereas attraction takes place between two unlike poles of a magnet and also between a magnetic material.

Ans 8 A bar magnet can be used to create a compass inorder to find the east direction. A compass is an instrument that is used to find direction. One end of the needle is often marked  "N" for north or colored in some way to indicate that it points toward North. East would be the direction that is perpendicular and to the right of the North Needle.

Chapter 10 Managing Files and Folders (Class 5)

Class 5

Chapter 10
Managing Files and Folders

C. Answer these questions.

1. Define a file and folder.
Ans - File - A file is a collection of data or information. 

Folder - A folder is a place to store files or other folders.

2. How can we create a folder?
Ans - Creating a Folder

Step 1: Click the drive icon.

Step 2: Click on New folder.

Step 3: Type a suitable name for the folder 

Step 4: Press the Enter key.

3. What is the use of Computer icon?
Ans - When we double-click on Computer icon  a new window open displaying icons of all the hard disk drives, saved files and folders in it.

4. Write the steps to move a file from one folder to another.
Ans - To move a file from one folder to another-
Step 1: Select the file.
Step 2: Select the destination folder where you want to move the selected file or folder.
Step 3: Click on the paste option.
 
5. What do you mean by resorting a file?
Ans - Restoring a file means returning a deleted file back to its original location.

6. How will you rename a file and folder
Ans - Renaming a File or Folder
Step 1:    Select the file or folder.
Step 2:    Click on Organize button and click on Rename option.
Step 3:    Type the new name and press Enter key.