Class V: SCIENCE [Ch-6 Safety And First Aid]

Define the terms

1. Commuter- The person who travels regularly between his workplace and his house.

2. Pedestrian- People traveling on foot.

3. Hazardous- Anything that involves risk or danger.

4. Orthopaedist- Doctor of bones and muscles.

Answer in one line

1. What is helpline no. for fire accidents?

Ans. 101 is the helpline no. for fire accidents.

2. Why is (Aloe Vera known as a natural healer for healing wounds)

Ans. Because this gel (forms the protective layer over the wounded area and helps in healing                    3. What is first aid?

Ans. The immediate help given to the injured person is called first aid.

4. What causes tetanus?

Ans. Tetanus (also known as lockjaw) is caused by a bacterium that enters the body through an open wound cut.

5. Where is the bacterium found?

Ans. The bacterium is found in soil, dust, and manure.

Answer in short

1. Why should (we should not light a fire in case of gas leakage)?

Ans. (Because the fumes of gas are highly flammable and even the smallest of sparks, can ignite a huge fire.)

2. What happens if a person has a fracture?

Ans. If there is a fracture then- 

i) Usually, the fractured part of the body gets swollen.

ii) It causes a lot of pain.

3. How can an animal bite be dangerous for you?

Ans. Animal bites can sometimes cause infections. Some bites need stitches while others heal on their own. Bites from stray animals can lead to rabies, a life-threatening infection.

Answer in detail

1. Mention two safety rules for-

a) Pedestrians- 

i) Always cross the road at the zebra crossing.

ii) If you are walking and there is no footpath, then keep to your left.

b) Vehicle drivers-

i) Always follow the traffic signals.

ii) Give way to the ambulance coming from behind.

c) Breaking of fire-

i) In case of a fire in the building, use a fire extinguisher if installed in the building.

ii) Vacate the building and do not use the lift instead use the stairs.

2. What should be done if burns are severe and blisters are forms 

Ans. if burns are severe and blisters are formed then-

i) Do not prick the blister.

ii) Clean the area with cold water.

iii) Put some sterilized gauze.

iv) Take the patient to the doctor.

3. Write down the first aid for-

a) Burns- 

i) Run cold water on the area.

ii) Apply antiseptic cream or lotion on the burnt area.

b) Bites-

i) Clean the wound with soap and water.

ii) Cover it with a clean bandage and take the patient to the doctor immediately.

c) Fracture-

i) Do not panic.

ii) Provide a sling and take the patient to an orthopaedist.

Give reason

1. Mr. Khan started rolling on the floor when his clothes catches fire. 

Ans. So that the oxygen supply gets cut off and the fire extinguishes. rolling on the floor will extinguish the fire and prevent further damage to the person.

2. When Mr. Sharma's scooter got caught fire his neighbors threw mud on the scooter?

Ans. Throwing mud and sand can cut the supply of oxygen and helps the fire to extinguish. as the petrol is lighter than water it can float and continue burning.

Story Based Question

Arpita wore a new nylon dress for Diwali but her mother made her change into her old cotton dress before she went to burn crackers.

Q1. Tick the correct option

Nylon is a synthetic fiber. (natural/ synthetic)

Q2. Cotton clothes do not catch fire easily. 

Q3. Why did her mother tell Arpita to change her clothes before burning crackers?

Ans. Because synthetic and nylon clothes catch fire easily.

Q4. What will you advise Arpita?

Ans. Never wear synthetic clothes while burning the crackers. Always wear cotton clothes during fireworks.

Diagram

Draw and label any 5 common traffic signals.