Greeting and peace be upon you.
Im excited to be part of this Knowledge Contest Its great to be here with so many smart people ready to test their knowledge. Im looking forward to answering questions on a variety of topics and having fun along the way. Lets see who comes out on top. Good luck to all of us.

How many oceans are in world?

There are a total of 5 oceans in the world

Source

• Arctic Ocean.
• Atlantic Ocean.
• Indian Ocean.
• Southern Ocean.
• Pacific Ocean.

Pacific Ocean

The pacific ocean is the largest and deepest ocean in the world covering more than 63 million square miles and extending from the arctic ocean in the north to the Southern Ocean in the south.

Arctic Ocean

the arctic ocean is the smallest and shallowest of the world's oceans located around the north Pole and surrounded by Eurasia.

Atlantic Ocean

The Atlantic Ocean is the second largest ocean in the world stretching between the Americas to the west and Europe and Africas to the east.

Indian Ocean

The Indian Ocean is the third largest ocean in the world located between Africa, Asia, Australia and the Southern Ocean.

Southern Ocean

The Southern Ocean also known as the antarctic ocean, encircles Antarctica and is the fourth largest ocean, known for its unique and cold marine ecosystem.

Which scientist developed theory of gravity?

The Theory of Gravity was created by Sir Isaac Newton by the motion of a falling apple in the 17th century 1687 in his garden in Wools Thorpe Manor.

Source

How many total bones present in a newborn and adult?

bones in newborn

A newborn has 300 bones from birth which decreases with loose of teeth and fusion of bones.

bones in adult

After loose of baby teeth and fusion of bones an adult has 206 bones left.
I hope you learn something new.
Thats all, take care and God bless you.
I invite @umar-khayyam @abdullah79 and @muhammad-ahmad.