Engish & science

How many layers exist not counting the ozone layer?

• 4

• 5

• 6

• 7

what is the ozone layer made of?

what is the tallest?

• Colosseum

• Chichen Itza

• Taj Mahal

• The Ancient City of Petra

How much Percentage of salad water are in the world?

• 97%

• 3%

• 16%

• 84%

What are the courses of the rivers?

• Up,middle,low

• Up,mid,low

• Upper,mid,lower

• Upper,middle,lower

What is it?

• Spear

• Shield

• Padded cloth

• Helmet

• Elmet

What is it?

What is "Who" used for?

• Machines

• People

• Places

• Wonders of the world