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Teacher presentation

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by

Elba Sepulveda

on 2 August 2013

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Transcript of Teacher presentation

In Search of the Dark Energy
Presentation
by:
Prof. Elba M. Sepúlveda
elbas@fnal.gov
Physics Teacher

Mentor: Brian B. Nord
nord@fnal.gov
Fermilab

Dark Energy Survey
2013
During my first two weeks I developed a series of documents with lots of questions about:
Dark energy, dark matter, origin of the universe, galaxies, galaxy clusters, surveys, gravitational lensing, probes and cosmology and life at CTIO

Duties
For TRAC Program
Teacher Research Associates
Cosmological constant
http://www.appsgeyser.com/382080
To have this information
You can link here:
www.fisicaenlinea.com

The Big Picture
I started thinking about concepts related to Dark Energy
How to connect with education?
How apply what we are learning to our classroom?

How to use this information to help students learn about cosmology?

How to improve 21st century education?
Research and discussion about students ideas of cosmology.
What is the Big Bang?
They think only stars are moving away.
They draw the expansion like an atom.
They say the expansion makes an increase of temperature.
Learn About Students' Misconception
Develop new ideas to help in the understanding of the expansion of the universe.
Independent study of topics.
Develop a way to demonstrate some of the topics.
Bubble ideas...
Concepts or layers
Miss-used topics
Read and discuss educational sources
Expansion of the Universe
Develop analogies and demo & lab
Develop the Expanding Universe lab activity.
This activity demonstrate two models of the expansion of the universe in two dimension and time.
Module
The purpose of it is to explain the expansion of the universe in a two dimensional model and to calculate the expansion coefficient.
The Balloon Universe
Analysis of the Hubble Constant
Rubber Band Universe
They will be used for:
http://darkenergydetectives.org
Balloon
Rubber Band
Calculation of the Hubble Time
Hubble (1929) real data
For future development
Other ideas
Spacetime
Equations
General Relativity
Weight in space
Expansion
Fate of the universe
Origin vs present
Existence
Present vs future
Type of universes
Cosmology constants
Gravitational lensing
Supernovae
Cluster of Galaxies
Galaxy distribution
Probes
DECAM
Vacuum energy
Zero point energy
Cassimir effect
Quintessence
Inflation vs steady state
Other
Types of Dark Energy
Background information
The problem of the cosmological constant is:
The cosmological constant is 120 orders of magnitude smaller than naively expected from quantum gravity.
Using the following equation:
Einstein attempted to apply his
new theory about the whole
universe.
He thought the universe was static.
Leads to consider Hubble discovery.
space-time <=> matter
energy density is related to Hubble constant
http://www.planetseed.com/files/flash/science/features/airspace/cosmos/universe/en/instructions.htm#explanation
Simulation
You determine the fate of the Universe by setting the value of Omega omega and deciding whether or not to include the Cosmological Constant.
Omega omega is the ratio of inward pull to outward push in the Universe.
Developing the idea of an expansion
https://www.e-education.psu.edu/astro801/content/l10_p4.html
http://map.gsfc.nasa.gov/universe/bb_concepts.html
http://aer.aas.org/resource/1/aerscz/v11/i1/p010104_s1
http://cds.cern.ch/record/485959/files/0102033.pdf
Cosmological constant problem
FRW metric
Vacuum energy

Transformation of energy
Mechanical energy
Stretching universe

https://en.wikipedia.org/wiki/Einstein_field_equations
Concepts that we can develop in our classroom
General cosmology
Origin of the universe
Relativity
Gravitation
Composition of the universe
Dark energy
Dark Matter
Teacher point of view
http://www.nextgenscience.org/search-standards
Objectives
Make mistakes and find the solution

From the simple to the complex
Do not just copy equations
Group work
Teacher <--> Student
Students need:
Learn about real errors
Depth and Global
Use a media source
Acutally apply
Collaboration
Scientific literacy
Support from institutions
Outreach
Full transcript