Please select a subject first
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A charged glass rod attracts a charged plastic straw.
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Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
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Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
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Phases of the moon occur because
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Which of the following reproduces only inside a host cell?
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A disease in human beings caused by virus is ______.
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Suggest a suitable word for the following statement.
Chemicals added to food to prevent growth of microorganisms
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Classify the following into friendly and harmful microorganisms.
| Yeast, malarial parasite, Lactobacillus, bread mould, Rhizobium, Bacillus anthracis |
| Friendly | Harmful |
| ______ | ______ |
| ______ | ______ |
| ______ | ______ |
| ______ | ______ |
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Observe the figure and answer the questions that follows.
- Write the name of the disease.
- Name the causative agent of this disease?
- How does the disease spread from one plant to another?
- Name any two plant diseases and the microbes that cause them.
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Observe the figure and answer the following questions.
- Name the microorganism and the group to which it belongs.
- Name the food item on which the organism grows.
- Does it grow well in dry or in moist conditions?
- Is it safe to eat infected bread?
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Which of the following represents the correct match for items in Column A with those in Column B.
| Column A | Column B |
| I. Nylon | (i) Thermoplastic |
| II. PVC | (ii) Thermosetting plastic |
| III. Bakelite | (iii) Fibre |
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Why is it not advisable to burn plastic and synthetic fabrics?
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Indicate whether the following statement is True or False. Also write the false statement in their correct form.
The fabric terywool is obtained by mixing terylene and wool
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Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material?
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Which liquid metal is used for making thermometers?
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If in the following figure, iron nail is replaced by a wooden stick, will the bulb glow or not? Justify your answer.
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Find out the names of three metals and three non-metals from the box given as figure.
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Fossil fuels are obtained from
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If a person’s clothes catches fire, the best way to extinguish the fire is to
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Choose the correct statement about inflammable substances from the following.
They have
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