ESCI - QUIZ 2

Encounter Hypothesis

This hypothesis suggests that a large celestial object (like another star) passed close to the Sun in the early days of the solar system. Its gravity pulled out gas and dust from the Sun. That material spread along the object's path, cooled down, and eventually condensed into planets.

Protoplanet Hypothesis

A near collision between the Sun and another star caused ejected materials to form tiny particles called planetesimals which collided and struck together to form planets

Nebular Hypothesis

The solar system started as a giant cloud of gas and dust. This proves why planets have different sizes, orbit in same direction, and flat plane.

Encounter, Protoplanet, Nebular

3 Hypothesis

Sun

There is an undergoing nuclear fusion in this core.

Convert hyrdogen to helium

How to produce the sun’s energy?

74

% of hydrogen in the sun?

24

% of helium in the sun?

Radioactive Zone

Energy from the core moves out slowly through radiation

Convection Zone

Outer layer of the sun’s interior where hot gasses rise and cooler gasses sink

Terrestrial Planets

Planets that are composed of rocks with a molten heavy metal core. Features valleys, volcanoes, and craters. (Fewer moons)

Jovian planets

These planets are hydrogen and helium. Gas; outer layer. Liquid; inner layer

Must orbit the sun, clear its orbit, spherical in shape

Criteria to become a planet (3)

Rotation

Planet movement around axis

Revolution

Planet movement around sun

Major axis

Minor axis

Aphelion

Perihelion

Equal Areas

As a planet orbits the sun, it moves faster when its closer to the sun and slower when farther from the sun.

Harmony

The square of the planet’s orbital period is proportional to the cube of its average distance from the sun

Asteroids

Rocky and airless remnants left over from the early formation

Comets

Cosmic snowballs of frozen gasses, rock, and dust that orbit around the Sun