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Class 8 The Invisible Living World: Beyond Our Naked Eye worksheet
CBSE Science. Cells and their parts, plant and animal cells, microorganisms and their uses. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
Robert Hooke first used the word "cell" after looking at:
- blood
- pond water
- onion peel
- thin slices of cork
Answer
(d) thin slices of cork
- 2.
The cell membrane:
- lets materials in and waste out
- stores water and materials
- makes food using sunlight
- gives the cell rigidity
Answer
(a) lets materials in and waste out
- 3.
Which microorganism is used for setting milk into curd?
- Spirulina
- Amoeba
- yeast
- Lactobacillus
Answer
(d) Lactobacillus
Section B · short answer
- 4.
What is a cell?
Answer
The basic unit of life; all living things are made of cells.
- 5.
Name (a) the part that makes food using sunlight (b) the part that stores water and materials
Answer
(a) chloroplast (b) vacuole
Section C · long answer
- 6.
Describe how to prepare an onion peel slide and what you see.
Answer
Peel a thin layer from an onion, place it in water on a slide, add a drop of safranin for about 30 seconds, wash, add glycerin and lower a coverslip with a needle. Under the microscope, nearly rectangular cells with a wall and a nucleus are seen.
Fresh sheets for your child
In the app, every The Invisible Living World: Beyond Our Naked Eye sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.