CBSE Test on science cph1-3

1. 1. Label the diseases

c

b

a

marasmus

kwashiorkar

obesity

2. 2. What is a Homogeneous substance?

• The components that make up the mixture are not uniformly distributed and cannot be seen clearly

• The components that make up are distributed uniformly and can be seen clearly

• Both sometimes

• A solute

• None of these

Answer explanation

Homogeneous substance is always uniformly distributed it cannot be seen clearly
Remember these two examples-Pizza and cookie

4. 3. Define winnowing

Answer explanation

Winnowing is used to separate heavier and lighter components of a mixture by wind or by blowing air. This method is used by farmers to separate lighter husk particles from heavier seeds of grain.

Draw an example of sedimentation

5. 5. How are diseases caused?

• germs

• lack of nutrients

• contact with sick person

• eating vegetables

• eating fruits

. Manvi was going to her friend’s birthday. She enjoyed parties but today she was not feeling good. When her friend’s mother observed this, she asked Manvi whether she is all right. Manvi told her that she has not eaten any food from the morning as she waited for the party. Manvi’s friend told her to sit down and have some food. She obeyed and finished her food.(b)Name the components present in food.

• carbohydrates, proteins, vitamins, fats, and minerals

• carbohydrates, minerals, vitamins, fats, zinc, iodine, iron

• carbohydrates, minerals, vitamins, fats, zinc, iodine, iron, folate

Manvi was going to her friend’s birthday. She enjoyed parties but today she was not feeling good. When her friend’s mother observed this, she asked Manvi whether she is all right. Manvi told her that she has not eaten any food from the morning as she waited for the party. Manvi’s friend told her to sit down and have some food. She obeyed and finished her food.(c)Out of these components, which are energy-giving ones?

• Carbohydrates and fats are energy-giving components in food.

• Vitamins and fats are energy-giving components in food

• Fats, iodine and iron are energy-giving components in food

• None of these

• I don't know

Do you think that exams should be banned?

• Yes

• No

• Maybe

• Of course not

Manvi was going to her friend’s birthday. She enjoyed parties but today she was not feeling good. When her friend’s mother observed this, she asked Manvi whether she is all right. Manvi told her that she has not eaten any food from the morning as she waited for the party. Manvi’s friend told her to sit down and have some food. She obeyed and finished her food. (a)Why was Manvi not feeling well?

• Manvi had not eaten any food since morning. She was tired as no energy-giving food has been eaten by her.

• Manvi is not feeling well because she is suffering a disease

• Manvi is not feeling well because she is weak

• none of these

Answer explanation

When a person is not eating energy-giving food they do not have a balanced diet so when one thing is too much or too less it is unhealthy. Remember Goldie Locks and the bear the Daddy bears things were too hard and the Mombear'sars things were too soft.