Chapter 7 E-mail (Class 6)

 Chapter 7 

E-mail

 

 

A. Tick the correct answer and fill in the blank.

1. Inbox

2. Both of these

3. sign in

4. bold

5. paper clip

 B. Write True or False.

1. True

2. False

3. True

4. False

5. False

C. Answer in short.

1. What is an e-mail ?

Ans – E-mail or electronic mail is a message send electronically from one computer system to another through Internet.

 

2. Write any two advantages of e-mail.

Ans – Advantages of E-mail 

*      E-mail is cost effective and fast.

*      It can reach any part of the world within seconds.

*      Same message can be sent to any number of people at no extra cost.

*      Pictures, documents or music files can also be sent with the message.

 

3. What kind of files can you send as an e-mail attachment?

Ans – We can send files such as pictures, videos and other documents as an attachment with the e-mail at no extra cost.

 

4. What is Sign out?

Ans –Once finished working with our e-mail account, it is important to sign out from your account and close the mail box to avoid its misuse by anyone else.

D. Answer in detail.

1. When do you use the Cc option? What is the full form of Cc and Bcc? What is the difference between the two?

Ans – The Cc option is used to send a copy of e-mail to many recipients.

The full form of Cc is Carbon copy and Bcc is Blind carbon copy. The difference between Cc and Bcc are:

Cc	Bcc
Cc: Used to send a copy of e-mail to many recipients. All Cc recipients are visible to all other recipients.	Bcc: Used to send copy of e-mail but in this case, the recipients in Bcc are not visible to anyone.

 

2. Write the difference between Reply and Forward option.

Ans –The difference between Reply and Forward option are-

Reply	Forward
This action is required to respond to the received mail. By default, reply goes only to the sender of the message. We can add more recipients if we want.	This action is required to share the received mail with others. We can also do modification while forwarding e-mails.

 

3. Write the steps to attach a file to your e-mail.

Ans – To attach a file into our e-mail-

Step 1: Click on Attach files button in the New Message window. A dialog box appears.

Step 2: Select the file to attach.

Step 3: Click on open button. Wait for few seconds the file is being attached. After the file is attached, the mail is ready to send.

Step 4: Click on send button.

 

4. How do you delete a mail and how do you restore it?

Ans – To delete an e-mail:

          Step 1: Select the e-mail by clicking on the checkbox at the left of the e-mail.

          Step 2: Click the Delete  button.

         

          To restore a deleted e-mail:

          Step 1: On the left pane, click More labels.

          Step 2: Choose Trash option. A new screen appears.

          Step 3: Select the e-mail you want to restore and right-click on it. A pop up menu appears.

          Step 4: Select Move to inbox option from the list to restore your e-mail back to the Inbox.

NCERT Solutions for Class 6 Science Chapter 15 Air Around Us

Chapter 15
Air Around Us

1. What is the composition of air?
Ans- Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and few gases. Some dust particles may also present in it.

2. Which gas in the atmosphere is essential for respiration?
Ans- Oxygen gas in the atmosphere is essential for respiration.

3. How will you show that air supports burning?
Ans- Take a small burning candle. Cover the burning candle with a glass jar. After few minutes the candle is extinguished. As the supply of air stopped due to glass jar the burning candle is also stopped. This experiment proves that air supports burning.

4. How will you show that air is dissolved in water?
Ans- Take a glass filled with water. On heating, bubbles are seen in the water. The bubbles are formed before water reaching its boiling point indicates dissolve air in water.

5. Why does a lump of cotton wool shrink in water?
Ans- Lump of cotton wool has air among gaps of cotton fibres. When water replaces the air from these gaps, the cotton lump becomes heavy and also shrinks due to removal of air gaps.

6. The layer of air around the earth is known as Atmosphere

7.The component of air used by green plants to make their food, is Carbon dioxide

8. List five activities that are possible due to presence of air.
Ans- Activities that are possible due to the presence of air are:
a) Winnowing
b) Photosynthesis
c) Respiration
d) Transpiration
e) Formation of cloud.

9. How do plants and animals help each other in exchange of gases in the atmosphere?
Ans- Animals and plants use oxygen from air during respiration and release carbon dioxide gas in air. But green plants also release oxygen gas by using carbon dioxide during photosynthesis. Thus, we can say that animals and plants help each other in exchange of gases.

NCERT Solutions for Class 6 Science Chapter 14 Water

Chapter 14
Water

 
1. Fill up the blanks in the following:

(a) The process of changing of water into its vapour is called evaporation or vaporisation.
(b) The process of changing water vapour into water is called condensation.
(c) No rainfall for a year or more may lead to droughts in that region.
(d) Excessive rains may cause flood .


2. State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.  Condensation
(b) Steam rising from wet clothes while they are ironed. Evaporation
(c) Fog appearing on a cold winter morning.
Condensation

(d) Blackboard dries up after wiping it.
Evaporation

(e) Steam rising from a hot girdle when water is sprinkled on it.
Evaporation

3. Which of the following statements are “true”?

(a) Water vapour is present in air only during the monsoon. False
(b) Water evaporates into air from oceans, rivers and lakes but not from the soil. False
(c) The process of water changing into its vapour is called evaporation. True
(d) The evaporation of water takes place only in sunlight. False
(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. True

4. Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how?
Ans: Yes, to dry the school uniform quickly, the uniform is spread near an anghiti or heater because evaporation is rapid at higher temperature. Higher the temperature faster is the rate of evaporation. So the uniform is dried up quickly.

5. Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?
Ans: The cooled water bottle has very cold exposed surface. Due to cool surface there is condensation of water-vapour from air on the surface of water bottle because water vapour is present in atmosphere. The condensed water molecules spread around the bottle. So a puddle of water is noticed after sometime.

6.To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet?
Ans: The breathe out gases contain water-vapour. The water-vapour condenses at spectacles so glass becomes wet and with the help of small amount of water, it is easy to clean the spectacles.

7. How are clouds formed?
Ans: The water present on the earth evaporates due to heating by the sun. The water vapour in the air condenses to form tiny droplets of water at high altitude, which appears as clouds. Thus clouds are formed by the condensation of water vapours present in air at high altitude.

8. When does a drought occur?
Ans: If there is no rain for a long period or for many years then there is scarcity of water in that region. This leads to drought.

Chapter 8 Let's Learn Scratch (Class 4)

Chapter 8

Let's Learn Scratch

E. Answer these questions.

1. What is a program?

Ans - The sequence of instructions given to a computer is called a program.

2. What is Scratch?

Ans - Scratch is a visual programming language used to create animations, games, stories and much more.

3. What is a Sprite?

Ans - Each object in Scratch, which is programmed to animate, is called a sprite.

4. What is Scripts/Code area?

Ans - Scripts/ Code area is the area where the code is written. A code is the collection of stepwise instructions that are given to a sprite to do a specific task.

Chapter 8 More About Scratch (Class 5)

 

Chapter 8
More About Scratch

E. Answer these questions.

1. What is Scratch?
Ans - Scratch is a graphical programming language developed by the Lifelong Kindergarten group at the MIT.

2. Define the following: 

(a) Sprite: 

Ans - Each object in Scratch which is programmed to animate is called a sprite. The Scratch cat is the default sprite in Scratch. We can change or add a new sprite.

(b) Backdrop:

Ans - Backdrop is the background of the stage in Scratch. Using backdrop, you can change the visual look of the stage area.

3. What is the use of Sprite Info pane?    
Ans - The Sprite Info pane, located below the Stage, displays detailed information about the sprites in a project. It display the thumbnails of all the sprites in the project.

4. What is the use of Events blocks?
Ans - Events blocks are used to control the events

 

 

Think and Tell  (page no. 105)

Describe the function of each block in short.

1. Ans - When the flag is clicked, the code runs

2. Ans - Controls direction in which a sprite can rotate in

3. Ans - On pressing specified key from the list, the code runs

Workbook Class 6 Science Chapter 11 Light, Shadows and Reflections

Chapter 11
Light, Shadows and Reflections

Exercise

I. Answer  the following questions in brief:

Q.1. What else is required to see a shadow besides a source of light and an opaque object?
Ans - When light falls on an opaque object a dark patch is formed on the other side of the object.

Q.2. Is the shape of the shadow of an object same as the shape of an object? If not, give an example proving so.
Ans - No, there is difference in the shape of the shadow as the object because it depends on the position of the sun. For example -
if we see our shadow in morning when sun rises or evening when sun sets our shadow is the largest at this time. 

Q.3. How is the image of an object taken from a pin-hole camera different from the object?
Ans - The image formed by a pinhole camera is inverted and smallest in size when compared to the original object. These cameras work on the principle that travels in a straight line. 

Q.4. Which property of light helps it to form shadows?
Ans - The reflection and rectilinear propagation of light helps in the formation of shadows.

Q.5. What does a mirror do to the direction of light that falls on it?
Ans - When light falls on a mirror, the direction of light changes.

Q.6. How is a shadow different from an image?
Ans - Image is the reflection of any object while shadow is the area of the object when light falls from a particular angle.

Q.7. Name any four things that can be used as screen for the formation of shadow or image.
Ans - (a) Opaque material , (b) Source of light.

Q.8. Given an activity to show that light travels in a straight line.
Ans - Fix a lighted candle on a table. Take a rubber tube, stretch it straight & look through it the name of the candle with one eye (keeping the other eye closed) we will find that when the rubber tube is straight we can see the light of candle flame through it.

 

II. Give one term for each of the following:

(a) Object through which light cannot pass at all. Opaque
(b) Figure formed when light bounces from a shiny surface. Reflected Ray
(c) Object which emits its own light  Luminous object
(d) Object through which we can see but not clearly. Translucent
(e) Figure formed when path of light is obstructed by an opaque object. Shadow


III. Fill in the blanks:

(a) We need a source of light, an Opaque object and a screen to form a shadow.
(b) Shadows can mislead us about the shape of the object.
(c) Light helps us see objects.
(d) Light travels in a straight line.
(e) Butter paper is a/an translucent object.
(f) The image formed by a pin-hole camera is real or inverted image.

IV. State whether True or False

(a) The shadow of an object gives us a clear idea about its shape and colour.   F
(b) Reflection of light is an indication that light travels in a straight line.   T
(c) Shadow and image are the same. F
(d) Light can travel through a bent pipe from one end to the other. F
(e) The image of the sun formed through a pin-hole camera is upside down.  T
(f) For the formation of a shadow, a source of light and an opaque object are enough.  F

V. Match the following:

(a) Reflection  - Mirror
(b) Rubbed glass   - Translucent
(c) Pinhole camera  - Upside down image
(d) Fire fly - Luminous
(e) Shadow - Opaque

VI. Select the correct alternative:

(i) Which of the following changes the direction of light that falls on it?
Ans - c) A mirror

(ii) In the activity shown below, light from the candle is not seen when the middle card board is moved sideways.

This activity shows that

Ans -b) Light travels in a straight line

(iii) What kind of object form shadows?

Ans - b) Opaque

(iv) Which of the following show that light travels in a straight line?

Ans - d) All of these

(v) Which of these are NOT needed for the formation of a shadow?

Ans - d) All of these are needed