SC Science TEST
Terms
undefined, object
copy deck
- floated
- as the material melted the more dense material sunk and the less dense materials _ to the surface
- rocks
- convection currents in are interior may have brought these to the curface
- mantle
- the middle layer
- orbit
- the path that a body traveles around another body in space
- gravity
- the matter is affected by the force of gravity& the particles are attracted to each other
- period of revolution
- amount of time it takes a body to complete a trip along an orbit
- gravity becomes gr8r than the strength of the rock
- what happenes when the earths diameter reached 350 kmr
- solar nebula
- cloud of gas & dust that formed our solare system
- oxygen
- that process released this into the air
- astononmical unit
- avg distance between the Earth and the sun
- pressure
- AS the particles of matter get closer, pressure increases& works oppsite of gravity
- major axis
- maximum lenghth of an ellipse
- greater
- newtons law of universal gravitation states that the larger & closer obj. are the _ the force of gravity
- crust
- the thin and solid outer most layer of the earth
- Nuclear Fusion
- the combination of the nuclei of small atoms to form a larger necleus
- photosynthesis
- about 3.4 bill yrs ago organisms that produced food by this
- sunspot
- a dark area of the photosphere of the sun that is cooler than the surrounding areas and that has a strong magnetic feild
- keplers 1st law
- this laws of motion says that planets orbit the sun in an elliptical path
- 3rd
- 2 helium-3 nuclei conbine to for a helium-4 nuclei si the _ step
- revolution& semimajor axis
- the 3rd law explains the relationship betweeen the period of a planets _ & its _
- revolution
- the motion of a body thqat traveles around another body in space
- planetesimals
- tiny building blocks of the planet, some becom the core of planets
- planet & the sun
- it is the distand between a _&_
- collide and stick
- in the outer regions of the solar nebula particles start to _&_ together
- gravity
- this pulls an obj toward another obj.
- gases
- the 1st atmosphere was a mixture of _ that were released as earth cooles
- planetesimals and radioactive material
- the collision of these 2 things caused the earth to heat up
- interia
- an obj tends to travel in a straight path inlesss acted on by an outside force
- Nebula
- Lg cloud of gas and dust in intersteller space
- carbon dioxide& water vapor
- molted rocks released lg amounts of thins & this in the atomsphere
- Energy
- during each step this is released
- semimajor axis
- 1/2 of the distance to the major axis
- photosphere
- the visible layer of the sun adn is considered the surface since we can see it
- coronaq
- thin outer layer of the atmosphere can be seen during a solar eclipses
- radiative zone
- dense region where light can take millions of years to pass through
- core
- the central part of earth
- Cinvective zone
- where hot and cooler gases circulate in convection currents
- closer, slower
- the 2nd law states planets travel faster when they are_ to the sun and _ when they are farther away
- 2 hydrigen neucli collide to form a heavy hydrogen neuclei called devterium
- 1st step of fusion in the sun
- core
- where the energy is produced
- solarflare
- regions of extremly high temp and brightness that develope on the suns surface
- 2nd step
- deuteriunm combines with another hydrogen neucli to form helium is the _ step
- gravity& pressure
- what are the two forces that are acting on the matter in a nebula
- rotation
- the spin of a body on its axis
- chromosphere
- a thin red region and can be seen during a tota solar eclipse