weather and climate quiz 2

what powers the sun

nuclear fusion Hydrogen atoms fuse together to make helium atoms,

the axis of the earth

points

sun rotates around its axis

one rotation every 28 days.

Surface temperature of the sun is

5000°C. The center is much, much hotter.

Solar flares are

eruptions of energy

Sun spots are

areas, 11 year cycle

the earth is closet to the sun during

winter

Energy can be transferred by

Conduction • Convection • Radiation

Conduction is the

the movement of heat through a substance

Convection is the

transfer of heat by mixing of a fluid

Winds are natural convection currents.

Radiation is the

transfer of energy that requires no physical medium

Radiation quality or type

to radiation wavelength

Warmer objects radiate

energy at shorter wavelengths than do cooler bodies

Wavelengths less than 4 µm are

shortwave radiation.

Wavelengths longer than 4 µm are

longwave radiation.

Intensity of electromagnetic radiation is

not depleted or reduced as it moves toward Earth.

Radiation intensity decreases in proportion to

the distance squared.

Earth’s average radiation form the sun is

1367 W/m2

Earth revolves around the Sun once every

365\.25 days

Earth revolves the Sun in an

ecliptic plane annually, known as a revolution