Life in the Universe

When an electron emits a photon, what happens?

Drops to a lower energy level

Which force is responsible for holding protons and neutrons together?

Strong force

Which process generates igneous rock?

Cooling and crystallization from a liquid

What spectrum does a star emit?

Continuous

What is the half life of Potassium-40

Potassium-40 takes 1.25 billion years to decay into Argon-40

If S waves from the opposite side of earth are detected as weak p waves, but no S waves, what does that indicate?

part of the earth’s interior must be liquid

What is the greenhouse effect

It traps infrared radiation by gasses in the atmosphere

How do we know earth’s core is liquid?

S waves cannot travel through liquid

Light can be emitted by…..

temp, fission/fusion,electron transmissions

Blackbody radiation

absorbs all/ reflects none

Continuous

Full spectrum

Emission

Missing all but a few

Absorption

contains all but a few

What contributes to atmosphere regulation?

Atmosphere retention/loss

Greenhouse effect,

Carbon cycle

Atmospheric retention

The ability to hold onto the atmosphere

What contributes to a planet’s escape velocity

Mass, Radius

Primary waves

Travels faster, moves like pressure waves

Secondary (S) waves

Slower

4 stages of early earth

Differentiation

Cratering

Volcanism

Slow surface evolution

Beta Decay

Process of transitioning a proton to a neutron

Fusion

combines atoms

Fission

Releases energy- splits atoms

Distance from earth to sun

1 au

How many neutrons does aluminum-27 have?

14 neutrons