Which one of the following activity requires oxygen?
Movement of a bicycle
Burning of wood
Building a house
Planting a tree
Burning of fire needs
oxygen
carbon dioxide
nitrogen
water vapour
When Suresh blown air in to a balloon it expanded. This shows that
air has no mass
air has volume and occupies space
air has no weight
air is invisible
Process of changing water vapour into water is called
filtration
condensation
sedimentation
decantation
In which place would the weather remain almost the same the whole year?
On a hill station
Near the coast
Near a desert
Near a river
The weather forecast in a week has been summarised as below. Answer the question based on the chart:Which day shows the maximum change in temperature?
Tuesday
Wednesday
Sunday
Friday
Answer the question based on the following figure
Arrow 1 represents:
land breeze
sea breeze
movement of water
movement of soil
The weather forecast in a week has been summarised as below. Answer the question based on the chart:On which day will clothes dry faster?
Saturday
Thursday
Many trees on the sides of a particular highway were bent on a side with twisted trunks and branches. This could be result of
defective seeds or saplings
pollution due to vehicles
wind due to vehicles
sound vibrations of the vehicles
Which of the following statements is true about the shadows formed by sun in different times in a day?
Sun's forms longer shadows at noon and shorter shadows in the morning and evening
Sun's rays fall straight in the morning and fall with an increasing slant as the day progresses to the evening
Sun's rays form shorter at noon and longer shadows in the morning and evening
The area of shadow formed at noon is greater than the area of the shadow formed in the morning and evening
