Questions and Answers
The process of separating cream from milk is an example of ___________.
centrifugation
Which process is used to obtain salt from seawater?
A mixture of powdered salt and sugar can be separated by the process of winnowing.
False
What is the process called when impurities settle at the bottom and clear liquid is poured off?
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Match the separation process with its appropriate example:
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Filtration can be used to separate components of a mixture of an insoluble solid and a liquid.
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Which type of root is associated with fibrous venation?
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Which of the following leaves have reticulate venation?
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Which of the following nutrients are primarily responsible for providing energy to the body?
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A balanced diet can prevent deficiency diseases.
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Name one vitamin that is essential for maintaining good eyesight.
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Deficiency of __________ causes a disease known as beri-beri.
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Match the following food groups with their nutrients:
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Which process is used to separate husk or dirt particles from pulses before cooking?
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The method of separating seeds of paddy from its stalks is called __________.
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It is not possible to separate sugar mixed with wheat flour.
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Study Notes
Major Nutrients in Food
- Carbohydrates provide energy.
- Proteins are essential for growth and maintenance.
- Fats offer concentrated energy.
- Vitamins and minerals support various body functions.
Nutrient Functions
- Energy-providing nutrients: carbohydrates and fats.
- Growth and maintenance nutrients: proteins and vitamins.
- Vitamin A is crucial for good eyesight.
- Calcium is necessary for bone health.
Foods Rich in Nutrients
- Fats: oils, butter.
- Starch: rice, potatoes.
- Dietary fibre: fruits (like apples), vegetables (like broccoli).
- Protein: meat, legumes.
Evaluating Statements
- Rice alone cannot fulfill nutritional needs. (False)
- A balanced diet can prevent deficiency diseases. (True)
- A balanced diet should have a variety of food items. (True)
- Meat alone is not sufficient for all nutrients. (False)
Fill in the Blanks
- Rickets is caused by deficiency of Vitamin D.
- Deficiency of thiamine causes beri-beri.
- Deficiency of Vitamin C leads to scurvy.
- Night blindness is due to deficiency of Vitamin A.
True or False Statements
- Stone is not transparent; glass is opaque. (True)
- A notebook has lustre, while an eraser does not. (True)
- Chalk does not dissolve in water. (True)
- A piece of wood typically floats on water. (True)
- Sugar dissolves in water. (False)
- Oil does not mix with water. (True)
- Sand settles in water. (True)
- Vinegar dissolves in water. (True)
Grouping Objects
- Round Shapes: basketball, orange, globe
- Other Shapes: sugar, apple, earthen pitcher
- Eatable: orange, sugar, apple
- Non-Eatable: basketball, globe, earthen pitcher
Odd One Out
- Furniture group: baby stands out.
- Flowers: boat is the odd item.
- Metals: sand does not belong.
- Solids: sugar is different from salt and copper sulfate.
Separation of Mixtures
- Separation is essential for purity and utility.
- Example uses: washing fruits to remove dirt, filtering water to obtain clarity.
Winnowing
- A process used to separate husk from grains using wind or air.
Separating Pulses
- Use water to rinse pulses, allowing husk and dirt to float and be discarded.
Sieving
- A method of separating solids based on size, often used in flour processing.
Sand and Water Separation
- Utilize filtration or decantation to separate sand settled at the bottom from water.
Sugar and Wheat Flour Separation
- Physical methods such as dissolving sugar in water and filtering can separate components.
Obtaining Clear Water
- Allow muddy water to settle; clear water can be poured off from the top after settling.
Fill in the Blanks for Separation Processes
- The separation method for paddy seeds is called threshing.
- Cream separation from milk involves filtration.
- Salt is obtained through evaporation from seawater.
- The separation method used with muddy water is decantation.
True or False for Separation Methods
- Mixture of milk and water can be separated by filtration. (True)
- Powdered salt and sugar cannot be separated by winnowing. (True)
- Husk separated from grains by handpicking is correct. (True)
- Sieving separates larger particles from smaller. (True)
- Decantation applies in sand and water mixtures. (True)
- Filtration separates insoluble solids from liquids. (True)
- Evaporation can separate solids from liquids. (True)
- A saturated solution cannot dissolve more solute. (True)
Correcting Statements about Plant Parts
- Roots absorb water and minerals from the soil.
- Stem holds the plant upright.
- Roots conduct water to the leaves.
- Number of petals and stamens can vary.
- Joined sepals typically mean petals are also joined.
- Joined petals do not affect the pistil’s attachment.
Drawing Requirements
- Draw a leaf, a taproot, and a flower from the studied material.
Plants with Weak Stems
- Example plant: morning glory, classified under climbers.
Functions of a Stem
- Supports leaves and flowers, conducts nutrients and water.
Leaf Venation
- Reticulate venation is found in: tulsi, China rose.
- Plants with fibrous roots usually have parallel venation in leaves.
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Description
Test your knowledge on essential nutrients in food and their functions. This quiz covers energy-giving nutrients, growth-related nutrients, vitamins, and minerals, as well as food sources rich in fats, starch, dietary fiber, and protein. Answer questions to deepen your understanding of nutrition.
