Which of the following elements is not present abundantly in earth’s crust ?

A. Silicon
B. Radium
C. Aluminum
D. Carbon

The sunlight can reach a depth of___________meters in the ocean

A. 80
B. 200
C. 120
D. None

Study of culture is called?

A. Odology
B. Anthropology
C. Ornithology
D. Psychology

The planet that moves round the Sun at the highest speed is_________?

A. Jupiter
B. Venus
C. Mars
D. Mercury

What is the temperature at the center of the Sun?

A. 6 million °c
B. 10 million °c
C. 15 million °c
D. 20 million °c

In which layer of atmosphere does commercial aircrafts usually fly?

A. Stratosphere
B. Troposphere
C. Mesosphere
D. Thermosphere

Approximate age of earth is ________?

A. 4.14 billion years
B. 4.64 billion years
C. 4.54 billion years
D. 4.34 billion years

One of the following is a water soluble vitamin?

A. Vitamin a
B. Vitamin d
C. Vitamin k
D. None

At which temperature does bacteria die?

A. 102f
B. 106f
C. 149f
D. None of these

What is the percentage of salt water on earth surface?

A. 93%
B. 95%
C. 97%
D. 76%