SECTION A: REVISION WORKSHEET I. MULTIPLE CHOICE QUESTIONS:- Choose The Correct Option: 1. Acid present in spinach is _________ a. Acetic acid b. Citric acid c. Lactic acid d. Oxalic acid 2. _________ is a substance which shows different colours in acidic and basic solutions. a. Indicator b. Thermometer c. Speedometer d. None of the above 3. Which of the following set of substances contain bases ? a. Grapes, lime water b. Vinegar, soap c. Window cleaner, milk of Magnesia d. None of these 4. Which of the following statements is/are true? i. Most of green plants can prepare their own food ii. All animals are autotrophs. iii. Carbon dioxide is not required for photosynthesis. iv. Oxygen is released during photosynthesis. Choose the correct answer from the options below: a. i and iv b. ii only c. ii and iii d. i and ii 5. A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because: a. friction between the layers of newspaper produces heat b. air trapped between the layers of newspaper is a bad conductor of heat c. newspaper is a conductor of heat d. newspaper is at a higher temperature than the temperature of the surroundings II. Define the following terms: a. Nutrition b. Photosynthesis c. Radiation d. Neutralization III. Differentiate between the following: a. Autotrophs and heterotrophs b. Clinical and Laboratory thermometer c. Conduction and Convection d. Acids and Bases IF YOU DONT KNOW DONT GIVE USELLES COMENTS AND ANSWER OTHERWISE I WILL REPORTED YOU AND DELETE THE ANSWER IF YOU GIVE CORRECT ANSWER I WILL MARK YOU AS BRAINLIEST
Answers
1.oxalic acid
2.indicator
3. lime water ,soap
4.1st and 4th statements
5.nutrition -the food and nutrients require for the living beings.
photosynthesis -the process by which plants make food by using chlorophyll and sunlight and release oxygen during this process.
Autotrophs and heterotrophs -autotrophs produce their own food and heterotrophs depend own other plants and animals for food.
Acids and base -acids are acidic in nature and ph value is 1 to 7.when ph value decreases acidic nature will increase. Acids are sour in taste.
Bases are basic in nature and ph value is 7 to 14.When ph value increases then basic nature will increase. It is bitter in taste.
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