The Doppler’s effect is applicable for_________?

A. Light waves only
B. Sound waves only
C. Both light waves and sound ways
D. None of these

What was the first planet to be discovered using a telescope?

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

Which gas does a Photocopier machine produce?

A. Ozone
B. Carbon dioxide
C. Sulfur dioxide
D. None of these

Which of the following ocean is the warmest ocean of the world?

A. Indian ocean
B. Arctic ocean
C. North pacific ocean
D. None of the above

Smallest animal is _________?

A. Skunk
B. Gorilla
C. Tiger
D. Cat

Which of the following ocean is the most polluted ocean of the world?

A. Indian ocean
B. North pacific ocean
C. Arctic ocean
D. None of the above

Which planet in our solar system has the most gravity?

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

Which of the following ocean is the least polluted ocean of the world?

A. Arctic ocean
B. Indian ocean
C. South pacific
D. None of the above

What does Angstrom measure?

A. Quantity
B. Speed
C. Length
D. None of these

Which of the following is called smallest, shallowest and coldest ocean of the world?

A. Pacific ocean
B. Indian ocean
C. Arctic ocean
D. None of the above