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 : The solar radiation coming to Earth is called

Option 1: Radiant energy

Option 2: Insolation

Option 3: Sunshine

Option 4: Terrestrail radiation

Question : The  process of photosynthesis involves conversion of 

Option 1: chemical energy into radiant energy

Option 2: chemical energy into mechanical energy

Option 3: solar energy into chemical energy

Option 4: mechanical energy into solar energy

Question : In which form is the supplied heat energy stored during change in temperature of substance?

Option 1: Heat energy

Option 2: Kinetic energy

Option 3: Potential energy

Option 4: Both kinetic and potential energy

Question : Select the option that expresses the given sentence in active voice.

Most of Earth's surface is covered by water.

Option 1: Water is covering most of Earth's surface.

Option 2: Water has been covering most of Earth's surface.

Option 3: Water covers most of Earth's surface.

Option 4: Water has covered most of Earth's surface.