Class 8 Chapter 6 Let’s Learn Photoshop

Chapter 6
Let’s Learn Photoshop

D. Answer in short.

Que 1. Name the three kinds of Eraser in Photoshop.
Ans - There are three types of Eraser in Photoshop.
Eraser Tool: To erase all those areas of an image on which we drag the mouse pointer.
Background Eraser Tool: To erase the background color from a layer of an image.
Magic Eraser Tool: To erase the areas of an image that share common color pixels.

Que 2. What is Photoshop?
Ans – Adobe Photoshop or simply called Photoshop is a photo editing software. It is used to edit, manipulate and recolor photographs and create special effects.
 
Que 3 How do you start Photoshop?
Ans - To start Photoshop–
Step 1: Click on Start button.
Step 2: Select Adobe Master Collection CS6.
Step 3: Click on Adobe Photoshop CS6.


E. Answer in detail.

Que 1. Write the use of Magic Wand Tool.
Ans - The Magic Wand is one of Photoshop's most powerful selection tools. It is a selection tool and used to quickly select the area of an image with a similar color just by single click.

Que 2. What is the use of Crop Tool? How do you crop an image?
Ans – The Crop Tool is used to keep only the selected part and remove the remaining portion.
Step 1: Click on Crop Tool.
Step 2: Drag over on the image to select the part of our image to be
retained. A cropping border will appear on the image. If we want to
change the selection size, we can use the crop handles.
Step 3: Press Enter key to Crop.

Que 3. How is Lasso Tool different from Marquee Tool?
Ans – The Marquee Tool provides various options to select the area of an image. It can be in rectangular, circular, elliptical or square shapes. The Lasso Tool is used for making a freehand selection. It helps to quickly select image along its edges.

Chapter 6 Formatting Slides in PowerPoint (Class 5)

Chapter 6
Formatting Slides in PowerPoint

D. Answer these questions.

Que 1. What is the use of built-in templates in PowerPoint?
Ans - Templates contain layouts, colors, fonts, effects, background styles for slides. PowerPoint offers many built-in templates.

Que 2. How will you add additional text in your slide?
Ans - To add additional text in your slides we use text box option.
      Step 1: Click on Insert tab.
      Step 2: Click on Text box option.
      Step 3: Drag the mouse pointer on the slide where we want to add the text.
      Step 4: Enter the text as needed.

Que 3. Write the steps to insert slides in a presentation.
Ans - We can insert new slides in a presentation.
      Step 1: Click on Home tab.
      Step 2: Click on New Slide.
      Step 3: Choose and click on a type of layout for the slide.

Que 4. What is the use of Align text?
Ans - Align text command is used to align the text between top and bottom edges of the placeholder. The options are Top, Middle and Bottom.

Chapter 6 Computer Memory (Class 4)

Chapter 6
Computer Memory

E. Answer these questions.

Que 1. Name the two types of computer memory.
Ans - There are two types of memory devices:

• Primary memory devices
• Secondary memory devices.

Que 2. What is the use of secondary memory? Give any two examples.
Ans - Secondary memory is needed in the computer to store data or information for a long period of time. Examples are CD, DVD, Blu-ray, pen drive, memory card, hard disk, etc.

Que 3. Write any one difference between RAM and ROM.
Ans - The difference between RAM and ROM are

	RAM	ROM
1	RAM Stands for Random Access Memory.	ROM Stands for Read Only Memory.
2	RAM store data or information temporary.	ROM store data or information permanently.
3	It is Volatile memory.	It is Non-volatile memory.

Que 4. Why are pen drives more popular than CDs/DVDs?
Ans - Pen drives are more popular than CD/DVDs because it is a portable storage device that can carried in a pocket and storage capacity of pen drive is much higher than CD/DVD.

Que 5. What is a byte?
Ans - A byte of memory is used to store a single character (a letter or a number). 1 byte is equal to 8 bits.

Que 6. What is a hard disk? What is its maximums storage capacity?
Ans -  Hard disk is the main secondary storage device that stores large amount of data permanently. Its maximums storage capacity is 5 TB.

Que 7. What is the use of SSD?
Ans - SSD (Solid State Drive) is a latest technology use to stores data permanently which has begun to replace the hard disk. It is  3 times faster than the hard disk but, it is little expensive than a hard disk.

NCERT Solutions for Class 6 Science Chapter 9 The Living Organisms and Their Surroundings

Class 6 

Chapter 9 

The Living Organisms and Their Surroundings

1. What is a habitat?
Ans: The surroundings where animals live is called their habitat. The organisms depend on their habitat for their food, water, air, shelter and other needs. Habitat means a dwelling place.

2. How are cactus adapted to survive in a desert?
Ans: Cactus are adapted to survive in a desert as they have

(i) Spiny leaves to prevent water loss through transpiration.
(ii) Stem is modified in such a way that it performs photosynthesis and conserves water.
(iii) Their roots go very deep into the soil for absorbing water.

3. Fill in the blanks:
(a) The presence of specific features which enables a plant or an animal to live in a particular habitat is called adaptation.
(b) The habitats of the plants and animals that live on land are called terrestrial habitats.
(c)The habitats of plants and animals that live in water are called aquatic habitats.
(d) Soil, water and air are the abiotic factors of a habitats.
(e) Changes in our surroundings that make us respond to them are called stimuli.

4. Which of the things in the following list are non-living?

Plough, Mushrooms, Sewing machine, Radio, Boat, Water, Hyacinth, Earthworm. 

Ans: Plough, Sewing machine, Radio, Boat and water are non-living.

5. Give an example of a non-living thing which shows any two characteristics of living thing.
Ans: Example of non-living thing is cloud which shows following two characteristics of living things:
(i) It grows in size
(ii) It shows movement.

6. Which of the following non-living things were once part of a living thing?

Butter, Leather, Soil, Wool, Electric Bulb, Cooking Oil, Salt, Apple, Rubber.
Ans: Butter, Leather, Wool, Cooking oil, Apple and Rubber are the non-living things which were once part of a living thing.

7. List the common characteristics of living things.
Ans: Some common characteristics of living things are:

• Growth
• Movement
• Reproduction
• Respiration
• Responsiveness
• Excretion

8. Explain why speed is important for survival in the grasslands for animals that live there. (Hint: There are few trees or places for animals to hide in grasslands habitats).
Ans: In grasslands habitats, there are few trees or places for animals to hide. When their enemy attacks they have to run faster so as to reach a safe place. If they fail, they lose their life. So, the speed is very important for survival of grassland animals. 

Class 6 Science-Workbook Chapter 8 Body Movements

 Chapter 8

Body Movements

Exercise

I. Answer the following questions in brief:

Q. 1. What is the use of joints in our body?

Ans - A joints are the part of the body where two or more bones meet to allow movement.

Q.2. Are all joints movable? If not, given an example?

Ans - No some joints are not movable. Example - The Fixed joint of our skull,

Q. 3. Which bones do the ribs join?

Ans - The ribs join with the backbone.

Q.4. What is the use of our backbone having a large number of bones joined together instead of being a single bone?

Ans - A large number of bones in our backbone help us to bend our body.

Q.5. Name the joint present in our (i) neck (ii) knee

Ans  (i) Neck: Pivot Joint  (ii) Knee: Hinge Joint

Q.6. Name any two organs which the rib cage protects.

Ans (a) Heart   (b) Lungs

Q.7. What are the upper parts of human ears made up of ? Where else is this substance found in our body?

Ans - The upper parts of human ears are made up of cartilage. It is also found in the joints of the body.

Q.8. What changes occur in a muscle when it contracts?

Ans - Muscular contractions are the mechanism that allows an individual, animal, or human to move its body, move the food in its digestive. The contraction shortens the muscle which moves the rigid structures, bones, to which they are attached.

Q.9. What kind of a skeleton does a snail have? Is it made of bones?

Ans -  The shell on the back of snails is called the exoskeleton or external skeleton. No, it is not made of bones.

Q.10 Why does an earthworm secrete a slimy substance?

Ans - An earthworm secrete a slimy substance because it helps them to move more easily through the soil.

Q.11. What are the wings of the birds made of?

Ans - Wings of birds are made up of feathers and hollow bones which help them to fly.

Q.12. How are joints important for our body?

Ans - Joints bind the skeleton together, to give structure and allow muscles to move bones to perform certain tasks such as running, reaching and holding.

Q.13. A muscle can only pull. How, then does it help in movement?

Ans - A single muscle can only pull, it cannot push. Thus, muscles work in pairs to move the bone. When one muscle contracts, it pulls the movable bone. When another muscle of the pair pulls, it brings the bone back to its original position.

Q.14. Why does a snake not move in a straight line?

Ans - Snakes move in S-shaped loops and in a zigzag manner. Each loop of the snake gives it a forward push by pressing against the ground.

Q.15. How does an earthworm make a grip on the ground?

Ans -  An earthworm has a large number of tiny bristles on the underside of its body that help it to grip the ground.

II. Give one term for each of the following:

(a) Structure formed by joining of chest bones with backbone. ribcage

(b) Shape of the fish which helps it to swim in water Streamlined body

(c) The framework of bones in our body Skeletal system

(d) The Manner of movement of an organism Gait

(e) Structure softer than the bone of which upper part of our ears is made. Cartilage

(f) Type of joint connection our neck to the head. Pivot joint

III. Fill in the blanks:

(a) The structure below the stomach which helps us to sit is pelvic bones.

(b) The joint between the upper jaw and the rest of the head is an example of fixed joint.

(c) Our muscles work in pairs.

(d) The bony part of the forelimbs of birds are modified as wings.

(e) Our forearm has two bones.

(f) A muscle can only pull, it cannot push.

IV. State whether True or False:

(a) A cockroach has four wings for flying. (True)

(b) Snails slither on the ground very slowly. (True)

(c) The body of an earthworm has the same structure as the body of a snake. (False)

(d) Fins help a fish to keep balance and direction while swimming. (True) 

(e) The shell of a snail is made of bones. (False)

(f) Our backbone is made of a single flexible bone. (False)

V. Match the following:

(a)  Upper part of ear -  (ii) Cartilage

(b) Forelimbs - (i) Wings

(c) Neck - (vi) Pivotal joint

(d) Shoulder - (iii) Ball and socket joint

(e) Upper jaw - (iv) Fixed joint

(f) Elbow - (v) Hinge joint

VI. Select the correct alternative:

(i) How many muscles are needed to move a bone?

Ans - (b) 2

(ii) A snail walks with the help of 

Ans - (c) Muscles

(iii) Which of the following have a backbone

Ans - (b) Snake

(iv) Which of these help(s) the fish to move?

Ans - (d) All of these

(v) The following figures show the models of some joints found in out body. Identify them.

Ans - (d) Ball and socket, hinge, pivotal

Class 6 Science-Workbook Chapter 7 Getting to know Plants

 Class VI

Chapter 7

Getting to know Plants

I. Answer the following questions in brief:

Q.1. What is petiole? Do all leaves have petioles?

Ans. The part of a leaf by which it is attached to the stem is called petiole. No all leaves do not have petioles. In some plants, leaves are attached directly to the plant stem.

Q.2. Where will you locate midrib in a leaf?

Ans. A midrib is commonly find at the back part of a leaf.

Q.3. If a plant has leaves with parallel venation what kind of roots will it have?

Ans. A plant has leaves with parallel venation will have fibrous roots.

Q.4. Name two climbers and two creepers.

Ans - Climbers : (a) Money Plant, (b) Green Peas

Creepers : (a) Pumpkin  (b) Water-Melon

Q.5. Which part of the plant helps it to stand upright?

Ans -The stem is the part of plant helps it to stand upright.

Q.6. What are lateral roots?

Ans -The smaller roots that grow on the main tap root are called lateral roots.

Q.7. Name the lowermost part of the pistil.

Ans - Ovary is the lowermost part of the pistil.

Q.8. Why are stems called 'two-way streets'?

Ans - Stems are called 'two-way streets' because water and minerals are transferred from the stem to the leaves in upward direction for photosynthesis at the same time food is transferred to other parts of the plant in downward direction.

Q.9. A potato has starch. Does it prepare starch itself? If not, where does this starch come from?

Ans - Potatoes do not make starch on their own. Starch is produced by the leaves and transported to the potatoes.

(H.w.) Q.10. Draw a diagram showing the inner structure of an ovary. Draw both longitudinal and transverse sections.

Ans -

II. Give one term for each of the following:

(a) The innermost part of flower  - Pistil

(b) Venation shown by leaves of plants heaving tap roots. Reticulate Venation

(c) Network of lines of a leaf. Veins

(d) Unwanted plants that grow themselves in a field. Weeds

(e) Plants that cannot stand upright and spread on the ground. -  Creepers

(f) Process of preparation of food by plants in the presence of sunlight. -  Photosynthesis 

III. Fill in the blanks:

(a) Roots anchor the plant to soil.

(b) Plants having fibrous roots have Parallel venation in them.

(c) Climbers take support of neighboring structures to stand upright.

(d) The topmost part of a stamen is called Anther.

(e) Stems transport water and minerals from roots to leaves though narrow tube(xylem) inside them.

(f) Water comes out of leaves in the form of vapour during the process of transpiration.

IV. State whether True or False

(a) Roots hold the plant upright. False

(b) Every flower has both stamens and pistil. False

(c) Number of petals in a flower is generally much more than the number of sepals. True

(d) All leaves have petioles in them. False

(e) Leaves make food which gets stored in potatoes in potato plants. True

(f) Carrot and radish that we eat are roots. True

(H.w.) V. Match the following:

Ans

VI. Select the correct alternative:

(i) Lateral roots are branches of

Ans (a) Tap roots

(ii) Which of the following parts of a plant in called a 'two-way street"?

Ans (d) Stem

(iii) Carrot, radish, turnip and tapioca are examples of 

Ans (b) Roots

(iv) Which of these is creeper?

Ans (b) Pumpkin

(v) Anther is a part of 

Ans (a) Stamen

(vi) Look at the Figures given below and state which of the following statements is true.

Ans (b) Leaves of plant in fig (a) have reticulate venation while those in fig (b) have parallel venation.

(H.w.) VII. Complete the following word puzzle with the help of the clues given below: