Matter Cycles
What are our three focus matter cycles
Water, Carbon and Nitrogen
Name a factor that influences ocean currents
Wind
Temperature
Salinity
Earths rotation
Sun and moon gravity
What star category is our Sun?
Main sequence star
What are the seven star categories?
O, B, A, F, G, K, M
What is the big bang?
Universe continuously expanding
What are Earth's 4 spheres
Biosphere
Geosphere/lithosphere
Hydrosphere
Atmosphere
What is the difference between weather and climate?
Weather - changes by the hour
Climate - average over many years
What two life stages occur after a planetary nebula
White dwarf and black dwarf (in that order)
What are the two variables that determine spectral class on an HR diagram?
Absolute magnitude (brightness from 10 parsecs away) and Temperature
Name a piece of evidence from the big bang theory
red/blue shift
cosmic background radiation
De-nitrifying bacteria
Name a human activity that contributes green house gas carbon
burning fossil fuels
land clearing/deforestation
industrial purposes/manufacturing
agriculture
transport
How are light years (ly) measured?
Distance light travels in one earth year
Name a galaxy type
Elliptical
Spiral
Barred-spiral
Irregular
What is steady state
universe always expanding but maintains density
What is the bacteria that helps absorb nitogen?
Nitrogen-fixing Bacteria
What effect does enhanced greenhouse gas cause?
Raised global temperature - hotter summers, warmer winters
melting ice and snow
rising sea levels
ocean acidification
what are the two forces determining a stars structure?
Gravity (inwards)
Heat and pressure (outwards)
define cosmology
The study of the origin, large scale structure, and fate of the universe
What is the Cosmic Microwave Background Radiation (CMBR)?
Leftover thermal radiation, stretched into microwaves
Name the two key metabolic functions in the carbon cycle
Respiration and Photosynthesis
Name an Australian Ocean current
Indonesian Throughflow
Leeuwin current
Antarctic circum polar current
East Australian current (EAC, from finding nemo)
3.26ly
What is the distance from the Milky Way to Andromeda?
2.5 million light years
During the first few minutes of the Big Bang, which two chemical elements were produced in the greatest abundance
Hydrogen and helium