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How can gravity be represented in a model to illustrate the orbit of…
How can gravity be represented in a model to illustrate the orbit of planets around the sun?
Features of a Scientific model
Types
Diagrams
Physical Replicas
Mathematical Representation
Computer simulation
Analogy
Purpose
represent scientific phenomenon's, ideas, objects or processes
predict outcomes
Limitations of my model
not easy accessible materials
Isn't 100% accurate
marble eventually stop (planets forever move)
border to stop marbles falling out (universe is forever expanding)
planet can only orbit sun and in one horizontal path (only 2D)
Features of my model
Plastic sheet
represent space
Marbles
represents smaller planets, moons, meteors, asteroids and more
weight in centre
represent the sun
Black lines
demonstrate the bending in space
Black felt border
prevent marble falling out
purpose
used to educate and explain the orbital path of planets and general relativity.
Benefits of my model
represent orbit, gravitational pull and general relativity
simplified complex phenomenon
used to educate and explain the orbital path of planets and general relativity.
Limitations of a model
misinterpret information
inaccurate representation of concept
Some are expensive
Hard to understand
limited access to materials
not always dynamic
Benefits of a Model
scale up small things
make predictions
replicate structure
usually 3D
demonstate relationships between variables/factors
Background information
Albert Einstein's General + Special Relativity
General discovered in 1905
inertial reference frames
no acceleration
Special discovered in 1916
geometry of space
Non-Euclidean
all reference frames
any acceleration
Albert Einstein
born 14th march 1879
Space
4 dimension
space time
curved by matter
continuum
everything is always moving
gravity
two object exerting force
depend on mass of object
keeps planets in orbit
planets
Solar System
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Mercury
moons, asteroids, comets, gas, dust, icy bodies
sun
orbit
path of an object around another
closer planets to sun travel faster
planets orbit at different rates