I presume you mean 'continents'. Like the number of oceans or seas, it depends on how you define a continent. I initially learned that there were 5 continents, but that lumps North and South America together as one continent; many people would count them separately, and would also count Antarctica, so that makes at least 7.
It's about 224.7 Earth days.
No star is an earth.
There are no horses in the earth, there are only horses on the earth
1.88 Earth years or 687 Earth days. is how many years for mars to revolve
earth has 365 days
The Earth is one world.
The earth has 3 layers
567 arw in earth
The Earth is a spheroid; it has no sides.
It was a holding action to force the Persian fleet to engage the Greek fleet in the hope of destroying it. The Greek fleet lost and was withdrawn. The force at Thermopylai was then also withdrawn. Its significance is symbolic - when the withdrawal was ordered the Spartan contingent selflessly continued to hold the pass to the death to let the other Greek contigents escape.
how many families of at least two people living together are on the earth
There are many goddesses of Earth, in many religions both ancient and modern.