Advertisements
Advertisements
Question
A newly planted sapling usually grows and matures into a tree in more than:
(a) 50 years
(b) 25 years
(c) 45 years
(d) 15 years
Solution
15 years
A plant sapling takes more than 15 years to grow and mature into a tree.
APPEARS IN
RELATED QUESTIONS
What substance is obtained as a residue when wood is burned in a limited supply of air?
How is charcoal prepared? Explain why, charcoal is a better fuel than wood.
Name the two groups in which various sources of energy are classified. State on what basis are they classified.
What is a solar cell? State two uses of solar cells. State whether a solar cell produces a.c. or dc. Give one disadvantage of using a solar cell.
State two advantages and two disadvantages of using nuclear energy for producing electricity.
State two limitations of solar energy.
State four traditional uses of solar energy.
State two advantages of box type solar cooker.
Why in cold countries windows have two glass panes with a thin layer
Of air between them?