lecture 1 review and lecture 2 prep

The solar dust-to-gas ratio is

• 1

• 0.01

• 100

• too small to measure

The core inside a giant planet in the Solar System has a mass around

• 1 Earth mass

• 10 Earth mass

• 100 Earth mass

Which bodies are in the Asteroid belt?

• Ceres

• Pluto

• Vesta

• Arrokoth

• Oumuamua

The first exoplanet was discovered in

• 2019

• 1995

• 1932

A minor body

• is approximately mm to cm in size

• km to 1000 km-sized

• is a dwarf planet

• can be in the asteroid or Kuiper belt

A characteristic pebble flux through a disc around a young solar-mass star is
(Myr is 10^6 yr)

• 0.1-1 solar mass/Myr

• 0.-1-1 Earth mass/Myr

• 10-100 Earth mass/Myr

• 1-10 solar mass/yr

For an irradiated disc around a solar-mass star, the water ice subblimation line is located

• within 1 au

• outside 10 au

• at the solar surface

Protoplanetary disc lifetime are around

• 0.5 Myr

• 3 Myr

• 100 Myr

• 4.5Gyr

the characteristic size of pebble is set by

(mark all processes that contribute)

• pebble fragmentation

• pebble drift

• UV irradiation

• collisional growth

The fractal dimension of pebbles is around

• 1

• 2

• 3

• 4