7th Science Term 1 Guide Unit 7 Visual Communication

7th Science Term 1 Guide Unit 7 Visual Communication

7th Std Science Term 1 Solution Guide in English Medium | Lesson.7 Visual Communication

7th Standard Science Samacheer kalvi guide 7 Visual Communication Book Back Question and answers Tamil Medium. 7th All subject Guide / Book Back answers. 7th Standard Science Text Book Download PDF.

7th Science Term 1 Guide Unit 7 Visual Communication

I . Choose the correct answer.

1. Which is the example for an Wimation ?

  1. sound communication
  2. visual communication
  3. vector communication
  4. raster communication

Ans : visual communication

2. Who uses the Photoshop software more ?

  1. Teacher
  2. Doctor
  3. Painter
  4. Photographer

Ans : Photographer

3. Which option is used in the Microsoft Photostory to upload the photos?

  1. Begin a Story
  2. Import Pictures
  3. Settings
  4. View your Story

Ans : Import Pictures

4. Which technology shows the computerdrawn pictures as real picture

  1. Inkscape
  2. Photo Story
  3. Virtual Reality
  4. Adobe Illustrator

Ans : Virtual Reality

5. Which technology uses pixels to create pictures

  1. Vector
  2. Raster
  3. both
  4. None

Ans : Raster

6. Which software is used to create symbols

  1. Photoshop
  2. Illustrator
  3. Vector Graphics
  4. Photostory

Ans : Vector Graphics

II. Match the following:

  1. Animations – 3D
  2. Raster – Visual Communication
  3. Vector – Pixles
  4. Virtual Reality – Microsoft Photostory
  5. Video Story – Illustrator

Ans : 1 – B, 2 – C, 3 – E, 4 – A, 5 – D

7th Science Term 1 Guide Unit 7 Visual Communication

III. Answer very briefly:

1. What is Raster Graphics?

  • Raster graphics are created on the basis of pixels.
  • The Photos taken by camera and the photos scanned by a scanner are of the Raster type.
  • When we enlarge this type of photos we could see the pictures as rectangular layers or grids.

2. Write notes on 2D and 3D pictures.

  • The 2D images have only two dimensions – length and height.
  • But 3D have length, height and width 3D images appear in front of our eyes like it happens in the real world.

3. Differentiate between Raster and Vector.

Raster Graphics

Vector Graphics

1. Raster graphics are created on the basis of pixels.

Vectors graphics are created on the basis of mathematics

2. Raster file types are .png, .jpg, .gif, .tiff, .psd

Vector types are .eps, .ai, .pdf, .svg, .sketch

3. Software used to edit Raster graphics is adobe Photoshop

Software used for vector graphic images. Adobe illustrator, Sketch.

4. With the help of Microsoft Photostory how will you create a video?

  • Microsoft photostory can be used to make videos using photos. First we have upload the photos and then select music for the video.


Open the application of Microsoft photostory in that select begin a new story and click on next.

Step 2:

Click import picture in the next screen. Now the files in our computer will appear. select saved pictures for videos.

Step 3:

No we can input small text which is apt to the pictures. Then click on next and give animation to the videos. We can give audio effect also to these images after finishing this click on next.

Step 4:

To provide background music, we can select a music file through select music and click on next.

Step 5:

Next select a title for the story and select the place where it has to be saved in your computer. Then, through SETTINGS, change the format of the video.

Step 6:

Now our video is ready to view. Click view your story. you can see your video now.

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