Which of the following is the hardest substance?

Related Mcqs:

Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer.

A. January – July B. June – December C. July – January D. December – June...

The temperature at which water boils depends mainly on ____________?

A. Air temperature B. Relative humidity C. Air pressure D. Air density E. The specific heat of air...

Constellations referred to as zodiac, are__________?

A. Imaginary regions that encompass the path of the planets B. Signs of Roman gods C. A group of stars D. None of these...

Penicillin is used to fight what type of infections?

A. Bacteria B. Viral C. Pneumonia D. Sepsis...

Earthquakes occur most frequently at __________?

A. Plate boundaries B. Plate surface C. Ocean beds D. All of the above...