Change of seasons and their formation is caused by:
- (A) Gravity
- (B) Revolution
- (C) Rotation
- (D) Velocity
- (B) Revolution
The average salinity of sea-water is:
- (A) 2.5%
- (B) 3.5%
- (C) 4.5%
- (D) 5.5%
- (B) 3.5%
Grit is another name for:
- (A) Granite
- (B) Shale
- (C) Sandstone
- (D) Breccia
- (C) Sandstone
What are called the remains or traces of animals and plants in rocks?
- (A) Burial
- (B) Remains
- (C) Fossils
- (D) Traces
- (C) Fossils
Sedimentary rocks are formed by the process of:
- (A) Weathering
- (B) Deposition
- (C) Solidification
- (D) Metamorphic
- (B) Deposition
Coal is an example of _______ rocks.
- (A) Sand dune
- (B) Metamorphic
- (C) Sedimentary
- (D) Igneous
- (C) Sedimentary
Which of the following is known as the “White coal”?
- (A) Cotton
- (B) Salt
- (C) Hydro-electricity
- (D) Ice
- (C) Hydro-electricity
Which of the following is known as the “Black Gold”?
- (A) Carbon
- (B) Coal
- (C) Oil
- (D) Sui gas
- (C) Oil
Which is the most environmentally friendly source of energy (electricity)?
- (A) Solar
- (B) Thermal
- (C) Hydro electric
- (D) Nuclear
- (A) Solar
The largest source of pollution in the world is:
- (A) Solar erosion
- (B) Loss of forest wealth
- (C) Loss of many valuable plants
- (D) Cutting of forests
- (A) Solar erosion