691. Which of the following is the most splendid and the most magnificent constellation in the sky?
A. Orion
B. Columbia
C. Canis Major
D. Taurus
E. None of these

692. Which of the following is the study of Eugenics?
A. By Altering the human beings through changing genetic components of them
B. People of the European region
C. Different races of mankind
D. Genetic of plants
E. None of these

693. What is The position of the earth in its orbit, when it is at the greatest distance from the sun that causes the northern summer called?
A. Aphelion
B. Perihelion
C. Perigee
D. Apogee
E. None of these

694. The Diamond is a very much expensive ornament what is it composed of?
A. Carbon
B. Gold
C. Silver
D. Platinum
E. None of these

695. layers that make radio transmission possible are_______
A. Troposphere
B. Ionosphere
C. Mesosphere
D. Stratosphere
E. None of these

696. why there is no total eclipse of the sun due to_______
A. the Size of the earth in relation to the moon
B. the Orbit of the moon around the earth
C. the rotation direction of the earth around the sun
D. The area of the sun is covered by the moon
E. None of these

697. Which of the following converts the Television signals into light signals?
A. Optical fiber
B. Transistor
C. Decoder
D. Photodiode
E. None of these

698. The half-life of the radioactive element is 8-days, In how many days it is reduced from 10 mg to 5 mg?
A. 4 days
B. 12 days
C. 16 days
D. 8 days
E. None of these

699. The Bronze is an alloy of_____
A. Copper and Zinc
B. Tin and Zinc
C. Copper and Tin
D. Iron and Zinc
E. None of these

700. What do we indicate with The term ‘Blue Shift’?
A. the Doppler effect in which an object is appeared bluer when it moves towards the observer or observer moves towards the object.
B. it Turns the star from white to blue
C. In the future sun becomes blue
D. in the start the Blackhole was blue
E. None of these