Midterm Study Deck Flashcards
SCIENCE
A SET OF IDEAS BASED ON OBSERVATIONS TESTED THROUGH EXPERIMENTATION AND REVISED WHEN NECESSARY TO ACCOUNT FOR NEW AS WELL AS OLD OBSERVATIONS.
SCIENTIFIC METHOD
A SYSTEMATIC APPROACH USED TO EVALUATE, TEST, AND EXPLAIN YOUR OBSERVATIONS.
SCIENTIFIC METHOD STEPS
STEP 1: ASK A QUESTION.
STEP 2: GATHER INFORMATION/RESEARCH
STEP 3: HYPOTHESIS
STEP 4: EXPERIMENT
STEP 5: ANALYZE DATA
STEP 6: CONCLUSION
HYPOTHESIS
IDEA OR EXPLANATION THAT CAN BE TESTED
CONTROL GROUP
NO VARIABLE ADDED
EXPERIMENTAL GROUP
VARIABLE ADDED
VARIABLE
A QUANTITY THAT CHANGES
SCIENTIFIC THEORY
A HYPOTHESIS THAT HAS BEEN TESTED RIGOROUSLY AND HAS WITHSTOOD CONTINUOUS TESTING. IT HAS BEEN SUPPORTED OVERWHELMINGLY BY EVIDENCE THROUGH OBSERVATIONS AND EXPERIMENTATION
SCIENTIFIC LAW
MATHEMATICAL DESCRIPTIONS OF NATURAL PHENOMENA
OCEANOGRAPHY
THE BRANCH OF SCIENCE THAT DEALS WITH THE PHYSICAL AND BIOLOGICAL PROPERTIES AND PHENOMENA OF THE SEA.
MARINE GEOLOGISTS
STUDY THE EARTH’S COMPOSITIONS, CHARACTERISTICS, CHARACTERISTICS OF SEAFLOOR SEDIMENT AND TECTONIC ACTIVITY
PHYSICAL OCEANOGRAPHERS
STUDY THE PHYSICAL NATURE OF THE OCEAN SUCH AS CURRENTS, WAVES, AND OCEAN-ATMOSPHERE INTERACTION.
CLIMATOLOGIST
STUDY THE OCEAN’S ROLE IN EARTH’S CLIMATE
CHEMICAL OCEANOGRAPHERS
STUDY THE DISSOLVED SOLUTES/GASES FOUND IN THE OCEAN AND THE IMPACT THESE DISSOLVED SUBSTANCES HAVE ON THE GEOLOGICAL AND BIOLOGICAL COMPONENTS OF THE OCEAN
MARINE ENGINEERS
DESIGN AND CONSTRUCT VARIOUS STRUCTURES THROUGHOUT THE WORLD’S OCEANS. CONSTRUCT DEVICES TO EXPLORE THE OCEANS
MARINE BIOLOGISTS/BIOLOGICAL OCEANOGRAPHERS
STUDIES THE BIOLOGICAL COMPONENTS OF THE OCEAN
INDEPENDENT VARIABLE
VARIABLE BEING TESTED
DEPENDENT VARIABLE
VARIABLES THAT DON’T CHANGE
WHEN DID THE BIG BANG OCCUR
13.7 BILLION YEARS AGO
WHAT CAUSED THE MASS OF THE BIG BANG TO EXPAND?
COLLISIONS
WHAT IS A DRIVING FORCE OF LARGER MASS
GRAVITY
TEMPERATURE OF EARLY UNIVERSE
VERY HOT
WHEN DID STARS AND GALAXIES FORM
1 BILLION YEARS AFTER BIG BANG
GALAXY
MASSIVE, ROTATING COLLECTION OF STARS, DUST, GAS AND OTHER DEBRIS COLLECTIVELY HELD TOGETHER BY FORCE OF GRAVITY
OUR GALAXY
MILKY WAY
WHAT TYPE OF GALAXY IS THE MILKY WAY?
SPIRAL
HOW MANY GALAXIES ARE IN THE UNIVERSE?
ESTIMATED 100 BILLION
TYPES OF GALAXIES
SPIRAL, ELLIPTICAL, AND IRREGULAR
SPIRAL GALAXY
APPEAR AS FLAT, BLUE-WHITE DISCS OF STARS, GAS AND DUST. ACTIVELY FORMING STARS. A LARGE PART OF THE UNIVERSE
ELLIPTICAL GALAXY
⅓ OF ALL GALAXIES AND NOT ACTIVELY FORMING STARS. CONTAIN LITTLE GAS AND DUST BUT ARE MADE OF OLDER STARS.
IRREGULAR GALAXY
ABUNDANT IN THE EARLY UNIVERSE BUT ARE NOT SEEN OFTEN TODAY STARS
STARS
MASSIVE SPHERE OF INCANDESCENT GASES, POWERED BY THE CONVERSION OF HYDROGEN TO HELIUM DURING A PROCESS KNOWN AS NUCLEAR FUSION
NUCLEAR FUSION
THE PROCESS OF COMBINING 2 OR MORE LIGHTER NUCLEI IN ORDER TO FORM A HEAVIER NUCLEI.
OTHER THAN THE SUN, HOW CLOSE IS THE NEXT CLOSEST STAR TO EARTH?
26 TRILLION MILES AWAY
STAR FORMATION
BORN FROM CLOUDS OF GAS AND DUST.
COLLISIONS IN THE CLOUD CAUSE THE GAS AND DUST TO COLLAPSE UNDER THE FORCE OF GRAVITY
AS THE CLOUD COLLAPSES, THE MATERIAL BEGINS TO HEAT UP. THIS IS KNOWN AS A PROTOSTAR
THE COLLAPSE AND HEAT OF THE PROTOSTAR CREATES A STAR
STAR DEFORMATION
LIFE AND DEATH ARE DETERMINED BY ORIGINAL MASS.
STARS LIVE FOR BILLIONS OF YEARS.
WHEN THE STAR HAS FUSED ALL THE HYDROGEN IN ITS CORE, THE STAR STARTS TO COLLAPSE.
HYDROGEN AVAILABLE ON THE OUTSIDE OF THE STAR MEANS FUSION OCCURS IN A SHELL.
RED GIANT
WHEN THE HOT CORE OF A STAR PUSHES THE LAYERS OF THE STAR OUTWARD CAUSING IT TO EXPAND AND COOL
SUPERNOVA
MORE MASSIVE STARS PRODUCE IRON IN THE CORE, COLLAPSE AND A VIOLENT ERUPTION HAPPENS
HOW OLD IS THE EARTH
4.6 BILLION YEARS OLD
HOW WAS THE MOON AND TILT OF THE EARTH’S AXIS CREATED?
EARLY EARTH COLLIDED WITH ANOTHER “PLANET”
IRON CATASTROPHE
EARTH CONTRACTED, CONVERTING GRAVITATIONAL POTENTIAL ENERGY INTO HEAT
IRON MELTED ALLOWING IT TO FLOW TO THE CENTER OF THE EARTH.
THE SINKING OF THE LARGE AMOUNTS OF IRON RELEASED FURTHER HEAT, ENOUGH TO MELT THE ENTIRE INTERIOR OF THE PLANET.
CONVECTION
HEAT RISES, HEATS UP THE PLANET, WHEN COOLS DOWN, FALLS BACK TO THE CORE
CRUST
THIN OUTER LAYER OF THE EARTH
MANTLE
LIQUID LAYER OF SILICATES. CONVECTION CAUSES IT TO STAY LIQUID AND HEAT THE CRUST
OUTER CORE
LIQUID LAYER OF IRON AND NICKEL
INNER CORE
SOLIDCORE OF IRON AND NICKEL.HEAT AND PRESSURE ARE THE REASON IT IS SOLID
CONTINENTAL CRUST
MADE OF GRANITE, LESS DENSE THAN OCEANIC CRUST
OCEANIC CRUST
MADE OF BASALT
WHEN DID THE OCEANS FORM
WHEN EARTH COOLED TO BELOW 212 DEGREES FAHRENHEIT
EARLY ATMOSPHERE
A STABLE ATMOSPHERE OF NITROGEN, CARBON DIOXIDE AND WATER VAPOR
WATER VAPOR CONDENSED TO FORM LIQUID WATER.
WATER MAY HAVE ARRIVED FROM COMET IMPACT
WHEN DID THE ATMOSPHERE BEGIN TO CHANGE?
3.5 BILLION YEARS AGO
HOW DID THE ATMOSPHERE CHANGE?
CARBON DIOXIDE WENT INTO THE ATMOSPHERE GIVEN OFF FROM VOLCANIC ERUPTIONS
PHOTOSYNTHESIS BEGAN, OXYGEN WENT UP AND CARBON DIOXIDE WENT DOWN
LITHOSPHERE COMPOSITION
SILICONE, IRON, MAGNESIUM
ASTHENOSPHERE COMPOSITION
IRON