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JUN. JICIC
Attempt all questions.
1. Which micro-organisms will grow on bread when we moisten a bread slice with water and
leave it in a warm and humid place for 3-4 days?
2. Recognize the following and write them in the boxes:
(a) Coming out of larva from eggs.
(b) Cutting off fleece of sheep.
(c) An animal that gives mohair wool
(d) A fine wool
3. Write 'Heat' or 'Temperature against each sentence.
(a) It determines the direction of flow of heat.
(b) It is measured in joule or calories.
(c) It is the quantity that determines the degree of hotness or coldness of a body.
(d) It is a form of energy.
4. You know that cooking utensils are made of metals. But their handles are made of wood,
why?
5. If you are sitting near the fire, you will get heat by-
(a) Conduction (b) Convection (c) radiation (d) all of these
6. Here are some statements about acids. Which of the following is correct?
(a) Acids are sour. (b) Acids are corrosive (c) Acids are not found in milk.
Only (a) &(b) are correct (ii) only (b)&(c) are correct (iii) only (a) & (b) are correct
(d) all of these are correct.
Answers
The green stuff on your slice of bread is called mold. Mold is a microscopic, living organism in the Fungi kingdom, related to yeast and mushrooms. Although it can be harmful if handled incorrectly, mold is not a bacteria or virus.
In the first stage of its life cycle, mold lays dormant as a spore, a reproductive structure that is similar to the seeds of plants. When these spores find a warm, moist, nutrient-rich environment they set up a colony, mature and produce more spores. That's the growth that you see on your food–trillions of mold spores!
Answer:
Gilbert and the other day of school and college students and teachers and students and teachers and students and teachers and students and teachers and students and students and students and students and students and students and students and students and students and students and students and students to the other side of the season with the other side