Class 8 Science sample paper 1

Q1. Fill in the blanks

  1. The size of the pupil becomes ______________ when you see bright light.
  2. The image formed by plane mirror is __________________.
  3. The embryo gets embedded in the walls of _____________ for further development.
  4. Animals which give birth to young ones are called ______________ animals.
  5. Designers of wallpapers and artists often use _______________to get ideas for new patterns.

Q2. State whether true or false.

  1. External fertilization takes place in a frog
  2. A Zygote is formed as a result of fertilization.
  3. Egg laid after fertilization is made up of many cells.
  4. Rods cells are use to sense colour in our eyes.

Q3. Choose the correct option.

1. The number of nuclei present in a zygote is? 

  1. two
  2. four
  3. three
  4. one

2. The transformation of the larva into an adult through drastic change is called.

  1. Budding
  2. Fertilization
  3. Metamorphosis
  4. Embedding

3. Which of the following statement is true?

  1. The angle of incidence is twice the angle of reflection
  2. The incident ray, the reflected ray and the normal drawn at the point of incidence lie in the same plane
  3. Some types of virtual images can be caught on the screen
  4. A plane mirror forms a real image

4. The persistence of vision of the eye is.

  1. 1/16 second
  2. 1/10 second
  3. 1/26 second
  4. 1/100 second

Q4.Answer in short

  1. State the laws of reflection.
  2. What is lateral inversion?
  3. Name the reproductive organs of female.

Q5.Answer in detail

  1. Explain the working of human eye with a neat and  labelled diagram.
  2. Describe the process of fertilization in human beings.