Estimate the angular resolution of the human eye.

Estimate the angular resolution of the human eye.

A) 0.5 degrees
B) 1.0 degrees
C) 1.5 degrees
D) 2.0 degrees
E) 0.004 degrees

Answer: E

Hydrostatic equilibrium in our Sun is the balance between:

Hydrostatic equilibrium in our Sun is the balance between:

A) Convection and radiation
B) Convection and gravitation
C) Pressure and radiation
D) Radiation and gravitation
E) Gravitation and pressure

Answer: E

By what mechanism does solar energy reach the Sun's photosphere from the layer just underneath it?

By what mechanism does solar energy reach the Sun's photosphere from the layer just underneath it?

A) Differentiation
B) ionization
C) Radiation
D) Convection
E) Conduction

Answer: D

The body which wiped out the dinosaurs was about:

The body which wiped out the dinosaurs was about:

A) As big as out Moon
B) As big as one of Mars' moons
C) A few hundred meters across
D) As big as a 747
E) As big as an SUV

Answer: B