Colour of Clothes

Q. Why do we wear light coloured clothes in summer and dark coloured clothes in winter

Q.

Question 7
In places of hot climate, it is advised that the outer walls of houses be painted white. Explain.

Q.

Question 3 (f)
Fill in the blanks :
(f ) Clothes of ___ colours absorb heat better than clothes of light colours.

Q.

Write the use of

Wire gauze

Q. shining object absorb heat or reflect heat?

Q.

What types of clothes should we wear in summers?

Q.

Question 4
Match the following:
$\begin{array}{cc}ColumnI& ColumnII\\ \left(i\right)Landbreezeblowsduring& \left(a\right)summer\\ \left(ii\right)Seabreezeblowsduring& \left(b\right)winter\\ \left(iii\right)Darkcoloredclothesarepreferredduring& \left(c\right)day\\ \left(iv\right)Lightcoloredclothesarepreferredduring& \left(d\right)night\end{array}$

Q. There are four cups made of different materials: Silver, aluminium, wood and copper. In which of these will tea remain warm for a longer time?

1. Aluminium cup
2. Copper cup
3. Wooden cup
4. Silver cup

Q.

Hair trap a lot of _________, which is a poor _________ of heat.

Q. Black objects are __________ of heat.

1. good absorbers
2. (a) and (b) above.
3. bad emitters
4. good emitters

Q.

Asbestos sheets which are ________ used for making the roof of sheds and houses.

Q.

Why are houses painted white in the hot regions?

Q.

Is a pencil hot or cold?

Q. Give reasons.
(a) After a hot sunny day, we sprinkle water on the roof or open ground.
(b) Perspiration keeps our body cold.
(c) Ice is rubbed on burnt part of the skin

Q.

Give reason: The radiator of a car is painted black.

Q.

Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun.

Which of the following is correct?

1. He should use a black coloured container.

2. He should use a white coloured container.

3. Either of the containers will take same amount of time.

4. It depends whether it is before noon or after noon.

Q. Sort the identical spheres in descending order according to their heat absorption capacity.

1. Black
2. Grey
3. Blue
4. White

Q. Which coloured t-shirt would you be comfortable wearing in summer season? Given fabric of every t-shirt is same.

1. 
2. 
3. 
4. 

Q.

Conduction current are set up where gas is heated.

1. True
2. False

Q.

(a) In places with hot climate, it is advised to paint the outer walls of houses with white paint. Explain.
(b) During summers wearing light coloured clothes is much more comfortable than wearing dark coloured clothes, why?

Q. Compared to a person with white skin another person with dark skin, will experience :

1. Less heat and more cold
2. Less heat and less cold
3. More heat and more cold
4. More heat and less cold

Q. Why do we wear cotton clothes in Summer ?

1. Cotton is a bad conductor of heat and doesn't allow passage of warmer air near body.
2. Cotton is a good conductor of heat and allows body heat to escape in the atmosphere.
3. Cotton absorbs sweat from the body, exposing it to atmosphere for easy evaporation
4. None of the above

Q. Why is it advisable to wear light coloured clothes in summer?

Q. Why is it advisable to wear light coloured clothes in summer?

Q. .................. surface absorbs more heat than any other surface under identical conditions.

1. White & Shiny
2. White & Rough
3. Black & Rough
4. Yellow & Shiny

Q. Which of the following is a reason for using woolen clothes in Winter ?

1. Wool is an insulator of heat.
2. It traps a layer of air in its fabric.
3. Air being an insulator doesn't allow body heat to escape into the atmosphere.
4. All the above

Q. In places with hot climate, it is advised that the outer walls of houses be painted white. Explain why?

Q. Wearing black clothes in summer is more preferable. True or false.

1. True
2. False

Q.

Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun.

Which of the following is correct?

1. Either of the containers will take same amount of time to boil the water

2. He should use black colored container

3. He should use white colored container

4. Can’t be said

Q. Why is it advisable to wear light coloured clothes during summer?

1. They are cheaper.
2. They absorb less heat.
3. They absorb more heat.
4. They are more beautiful to the eyes.