Food Important Question Answer - Class 5 Science | Complete Learning Material PDF

Q1: What is the meaning of the word "disease"?
Ans: The word "disease" means "not at ease" or "uncomfortable." A disease is a condition that affects the normal functioning of the body or mind, causing discomfort or illness.

Q2: What are some classifications of diseases? 
Ans: Classifications of diseases include non-communicable diseases and communicable diseases.

Q3: What are non-communicable diseases?
Ans: Non-communicable diseases are those that do not pass from one person to another. Some non-communicable diseases are present at birth, while others occur due to a lack of nutrients in our bodies. Some are caused by pollution or harmful chemicals. Examples of non-communicable diseases include asthma, beriberi, goitre, kwashiorkor, and marasmus.

Q4: What are communicable diseases? What causes them?
Ans: Communicable diseases, also known as infectious diseases, are those that can be passed from an infected person to a healthy person. These diseases are caused by tiny germs called pathogens, including viruses, bacteria, fungi, protozoa, and worms.

Q5:What is malnutrition? 
Ans: A lack of proteins and carbohydrates in our body leads to malnutrition. When malnutrition is specifically due to insufficient proteins, it is referred to as Protein Calorie Malnutrition (PCM).

Q6: Explain the indirect mode of spreading communicable diseases.
Ans: Communicable diseases can also spread indirectly when a sick person coughs or sneezes, releasing germs into the air. Inhaling this air can make a healthy person sick. Germs can also spread through infected food, water, and even through insects and animals.

Q7: How can we prevent communicable diseases through good hygiene?
Ans: We can prevent communicable diseases by maintaining good hygiene. This includes washing our hands before and after eating, not allowing stagnant water near our homes, using mosquito nets or repellents, and keeping food covered to prevent flies from sitting on it.

Q8: What are some ways to prevent the spread of germs from an infected person to a healthy person?
Ans: The spread of germs from an infected person to a healthy person can be prevented by maintaining good hygiene. A sick person should cover their mouth and nose while coughing or sneezing. Items like towels, clothes, handkerchiefs, and utensils used by the sick person should not be shared. Hands should be washed regularly, and homes should be kept clean to reduce the spread of germs.

Q9: How do mosquitoes spread communicable diseases? Give examples.
Ans: Mosquitoes act as vectors that carry disease-causing germs. When a mosquito bites an infected person, the germs enter its body. Later, when the same mosquito bites a healthy person, the germs are passed into the healthy person's blood, causing disease. Examples include malaria (spread by the female Anopheles mosquito) and dengue (spread by the Aedes mosquito).

Q10: How can vaccination help prevent communicable diseases?
Ans: Vaccination is a way to prevent communicable diseases. It involves getting a vaccine that helps the body build immunity against certain diseases, making it less likely to get sick from those diseases.