Radioactive potassium, uranium and thorium
are thought to be the three main sources of heat in the Earth's interior, aside from that generated by the formation of the planet. Together, the heat keeps the mantle actively churning and the core generating a protective magnetic field.
How the planets were formed?
The various planets are thought to have formed from
the solar nebula
, the disc-shaped cloud of gas and dust left over from the Sun's formation. The currently accepted method by which the planets formed is accretion, in which the planets began as dust grains in orbit around the central protostar.
What are the main heat sources of planets?
Radioactive potassium, uranium and thorium
are thought to be the three main sources of heat in the Earth's interior, aside from that generated by the formation of the planet. Together, the heat keeps the mantle actively churning and the core generating a protective magnetic field.
What is the source of heat that started from the formation of planets in the solar system?
Condensation in the disk led to the formation of planetesimals, which became the building blocks of the planets. Accretion of
infalling materials
heated the planets, leading to their differentiation. The giant planets were also able to attract and hold gas from the solar nebula.
Which is the most heated planet?
Venus
is the hottest planet in the solar system. Although Venus is not the planet closest to the sun, its dense atmosphere traps heat in a runaway version of the greenhouse effect that warms Earth.
What are the 4 sources of heat in the earth?
- Solar Energy. The sun is Earth's major external source of heat energy. …
- Geothermal Energy. Geothermal energy comes from within the Earth. …
- Biomass. …
- Fossil Fuels.
What are the 2 sources of heat in our planet?
There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2)
frictional heating
, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
Are planets still forming?
Planets are thought to form in a
disc of dust
and gas, also known as a protoplanetary disc, surrounding a host star. Theoretical models suggest planets should begin to take shape while the host star is still growing – but until now, we have only seen active evidence of planet formation …
What are the 2 main types of planets?
Planets are generally divided into two groups:
the terrestrial and the giant planets
. The terrestrial planets are the four inner planets: Mercury, Venus, Earth, and Mars.
Who created the planets?
| PLANET DIST. FROM SUN (A.U.) ORBIT PERIOD (EARTH-YEARS) | Neptune 30.11 164.79 | Pluto 39.44 248.5 |
|---|
What holds the solar system together?
Our Sun – the heart of our solar system – is a yellow dwarf star, a hot ball of glowing gases.
Its gravity
holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit.
Why did solar nebula heat up as it collapses?
3) Why did the solar nebula heat up as it collapsed? A)
Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula
. … As the cloud shrank, its gravitational potential energy was converted to kinetic energy and then into thermal energy.
What is the closest planet to the Sun?
Mercury
is the planet that orbits the closest to the Sun.
Which is the only planet that can sustain life?
Nonetheless,
Earth
is the only place in the Universe known to harbor life.
What is the hottest and coldest planet?
The hottest planet in the solar system
is Venus
with an average temperature of 464 degree Celsius and the coldest planet in the solar system is Pluto with an average temperature of -225 degree Celsius.
Is Venus hot or cold?
It appears that the surface temperature ranges from about
820 degrees to nearly 900 degrees F
. The average surface temperature is 847 degrees F., hot enough to melt lead.
