Global Warming

Q.

Without green house effect, the average temperature of earth's surface would have been :

(a) $-{18}^{\circ }C$ (b) ${33}^{\circ }C$

(c) $0^{\circ }C$ (d) ${.15}^{\circ }C$

Q.

Why is ozone not a greenhouse gas?

Q.

Name three greenhouse gases.

Q.

What would have been the temperature of earth atmosphere in absence of green house gases in it ?

Q.

What do you mean by green house effect?

Q.

Why does a piece of ice when touched with hand appear cold?.

1. Because ice loses heat to hand.

2. Because on touching ice, it melts to water at 0^oC

3. Because temperature of ice is very low.

4. Because hand loses heat to ice.

Q.

State the effect of global warming in coastal regions.

Q.

How will global warming affect the sea level?

Q.

How will global warming affect the agriculture ?

Q.

What do you mean by global warming ?

Q.

State two ways to minimise the impact of global warming.

Q. Why are exposed water pipes lagged with straw during winter.

Q.

State the effect of green house gases on the temperature of earth's atmosphere.

Q.

Name the radiation which are absorbed by the green house gases.

Q.

Why are the houses with thatched roofs cooler in summer than the concrete summer?

Q.

A good insulator of heat is :

1. iron

2. mercury

3. copper

4. trapped air

Q.

What will be the effect of global warming at the poles ?

Q. Without the presence of greenhouse gases in the atmosphere, the earth's average surface temperature would be ______ ${}^{\circ }\text{C}$.

1. $-25$
2. $30$
3. $15$
4. $-18$

Q. When we use blanket why do we feel warm?

1. Because the blanket is warm
2. Because the blanket doesn't allow air to enter
3. Because our body is warm
4. None of the above

Q.

How does the greenhouse effect make the Earth hospitable?

Q. When we are near to ice, why do we feel cold?

1. Because our body temperature is higher than the surrounding temerature
2. Because we wear warm cloth
3. Because there is ice near to us
4. None of the above

Q.

What is the greenhouse effect?

Q. What will happen if there are air bubbles in the tube?

1. Mercury will begin to get heated
2. It will add more unwanted pressure
3. Both A and B
4. None of these

Q.

After holding a pack of ice in your hand for some time, put your hand now in water at a normal temperature. Your hand would now feel the water to be :

1. Hot

2. Cold

3. Same as before

4. Can’t be said

Q. Without the presence of greenhouse gases in the atmosphere, the earth's average surface temperature would be ______ ${}^{\circ }\text{C}$.

1. -18

Q. Why do we feel cold during winter?

1. Because our body temperature is higher than surrounding temperature
2. It doesn't depend on our body temerature
3. None of the above
4. Because our body temperature is lower than surrounding temperature

Q. What is the best thing to do when strong winds are blowing over a hut having a weak thatched roof ?

1. Open the doors and windows
2. Close all the doors and windows
3. Make holes in the roof
4. Burn wood inside

Q. What do you understand by the term ventilation ?

Q. a bubble is exhaled by a man 45 m under water had 1 cm as radius it went up and burst what is radius of bubble at time of bursting

Q. Which of the following is not the effect of global warming?

1. Sustained flora and fauna
2. Rise in the sea level
3. Rise in the average surface temperature
4. Melting of ice at the Poles