3. This type of nutrition spoils many things in monsoons or humid environments.
Explains processes and events.
Answer the following.
1. Why do we feel more heat when we keep one hand above the candle flame than
keeping on the side of the candle flame?
2. Explain the process of digestion in humans.
Conducts simple investigations to get the answers to questions.
Answer the following questions.
1. How will you determine that the leaves other than green can make their own
food by photosynthesis.
2. State the process of making silk.
Answers
Answer:
1 we feel more heat when we keep one hand above the candle flame than keeping on the side of the candle flame because hand above the flam is heated due to conduction and keeping hand on side heats with the help of radiation
2 The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.
answer the following questions
1 Some leaves which are not green also make their own food since they contain a little amount of chlorophyll.
By doing the starch test, If a leaf had performed photosynthesis, it will turn blue-black indicating the presence of starch stored in it.
If the leaf had not done photosynthesis, it will turn brown indicating the absence of starch.
2 Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.
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