Question : Heat from the sun reaches the Earth by:

Option 1: reflection

Option 2: conduction

Option 3: radiation

Option 4: convection

Question : A person can jump higher on the moon's surface than on the earth because : 

Option 1: The moon's surface is rough

Option 2: the acceleration due to gravity is smaller than that on the earth

Option 3: the moon is cooler than earth

Option 4: the moon has no atmosphere

Question : What are the main energy sources for Earth's internal heat engine?

Option 1: Radiogenic heat and oceanic tide heat

Option 2: The heat from volcanoes and solar heat

Option 3: Solar heat and oceanic tide heat

Option 4: Radiogenic heat and primordial heat

Question : What powers the Earth's internal heat engine?

Option 1: Solar Energy

Option 2: Volcanoes

Option 3: Radioactive energy

Option 4: Tides

Question : The atmospheric layer farthest from the Earth's surface is known as

Option 1: Stratosphere

Option 2: Exosphere

Option 3: Ionosphere

Option 4: Mesosphere