7

Q1. Does the amount of humidity change in the same day?

Solution

Yes, the amount of humidity changes in the same day because as the temperature increases the rate of evaporation increases and vice versa.

Q2. Weather is average atmospheric conditions of a for a long time.

• 1) False
• 2) True

Solution

False Weather is the day to day condition while the average atmospheric conditions of a for a long time is the climate of that place. 

Q3. How can you prepare your own rain gauge?

Solution

Fix a scale to a cylindrical jar and a funnel at its top .This graduated cylinder will act as rain gauge.

Q4. Why weather reports in news papers show maximum and minimum temperatures?

Solution

Due to heat of sun, temperature during the day increases and becomes maximum at noon and during night it falls and become minimum at the time of dawn.

Q5. Hygrometer is a graduated cylinder with a funnel.

• 1) False
• 2) True

Solution

False The rain gauge is a graduated cylinder with a funnel.

Q6. If the humidity of a place is less then

• 1) Less evaporation will take place
• 2) Rate of evaporation remains constant
• 3) More evaporation will take place
• 4) Temperature will increase

Solution

The rate of evaporation at a given place is always dependent on the humidity of that place. If the air has less water vapour, then it can still hold excess vapour and therefore, evaporation will occur at a faster rate.

Q7. Which of the following devices is used to measure wind speed?

• 1)
• 2)
• 3)
• 4)
• 5)
• 6)
• 7)
• 8)

Solution

A device called anemometer is used to measure wind speed and wind pressure.

Q8. The amount of rain received is measured in

• 1) Litres
• 2) Litres
• 3) Millimetres
• 4) Millimetres
• 5) Millilitres
• 6) Metres
• 7) Metres
• 8) Millilitres

Solution

Rainfall at a place is measured in millimetres.

Q9. _____________ consists of graduated cylinder with funnel.

Solution

Rain gauge consists of graduated cylinder with funnel.

Q10. Atmospheric conditions of a day are known as weather.

• 1) False
• 2) True

Solution

True

Q11. Why the days are shorter in winter than in summer?

Solution

During summer, sunrise is early and the sunset is late. Due to this, days are longer in summers and nights are shorter. On the other hand, during winter the sunrise is late but the sunset is early. Due to this, days are shorter in winter but the nights are longer.

Q12. Why mangroves are found in coastal region?

Solution

Mangrooves are able to survive in salty water so they are found in coastal regions.

Q13. Which of the following animals are not adapted to live on the trees?

• 1) Red-eyed frog
• 2) Big cats
• 3) Toucans
• 4) Monkeys

Solution

Big cats including lions and tigers are adapted to live on the land.

Q14. Study of weather is known as meteorology.

• 1) True
• 2) False
• 3) True
• 4) False

Solution

True

Q15. Average weather conditions of a place is known as_____________.

Solution

Average weather conditions of a place is known as climate.

Q16. Which of the following devices is used to collect and measure rainfall?

• 1) Thermometer
• 2) Rain gauge
• 3) Anemometer
• 4) Hygrometer

Solution

Rain gauge is a device used to collect and measure rainfall at a place.

Q17. Temperature remains constant throughout the day.

• 1) False
• 2) True

Solution

False The temperature of a place keeps changing according to the time.

Q18. Why Mumbai receives high rainfall than Pune?

Solution

Mumbai is situated at windward side of western Ghats and Pune is situated at leeward side. So, Mumbai receives high rainfall.

Q19. Climate affects the vegetation of a place.

• 1) False
• 2) True

Solution

True

Q20. Humidity is measured by Rain gauge.

• 1) False
• 2) True

Solution

False Rainfall is measured by Rain guage.

Q21. Why mosses are best suited for polar regions?

Solution

Mosses are short lived flowering plants. They complete their life cycle in short summer period. So they are well suited for polar regions.

Q22. Unit of measuring rain fall is _____________.

Solution

Unit of measuring rain fall is mm.

Q23. Why evergreen forests are found in equatorial region?

Solution

Equatorial region has hot and wet climate which is good for growth of various types of plants and animals.

Q24. Why nights are foggy during winters?

Solution

In winters when temperature falls after sunset, water vapour condenses near the ground .The droplets hanging in the air form fog so, nights are foggy in winters.

Q25. Why deciduous trees shed their leaves during autumn season?

Solution

Deciduous trees grow in tropical regions during autumn season. As there is shortage of water so to cope up with this condition they shed their leaves.

Q26. How have polar bears adapted to the polar regions?

Solution

Polar bears have white fur which protects them from predators and helps them catch their prey as they are not easily visible. They go swimming on warm days to cool off. Their wide and large paws help them swim well and walk with ease in snow. They can remain underwater for a long time as they can close their nostrils to prevent the entry of water. They have a strong sense of smell which helps them to hunt their food. They have two layers of fur and a thick layer of fat which protects them from the cold and keeps them warm.

Take Another Test