Chapter 9 of 10
Concept Maps
Universe — Concept Maps
Tamil Nadu Board · Class 9 · Science
3 concept maps of Universe for Tamil Nadu Board Class 9 Science, each also written out as a text outline. Maps: Universe – Complete Chapter Overview.
45 questions29 flashcards5 concepts
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3 Concept Maps
Universe – Complete Chapter Overview
The map in words
- Universe
- Building Blocks
- Big Bang
- 13.7 billion years ago
- All matter at one point
- Expansion continues
- Galaxies
- Spiral
- Elliptical
- Irregular
- Milky Way
- 100 billion stars
- 100000 light years wide
- We are 25000 ly from centre
- Andromeda
- Nearest galaxy
- 2.5 million light years
- Stars
- Nuclear Fusion
- Blue stars hottest
- Red stars coolest
- Constellations
- 88 officially recognised
- Orion Leo Scorpius
- Pole Star
- Appears stationary
- Lies on Earths axis
- Big Bang
- Solar System
- The Sun
- 75 percent hydrogen
- 25 percent helium
- 4.6 billion years old
- Nuclear fusion
- Inner Planets
- Mercury
- Venus hottest
- Earth only life
- Mars red planet
- Outer Planets
- Jupiter largest
- Saturn rings
- Uranus tilted axis
- Neptune windiest
- Other Bodies
- Asteroids between Mars and Jupiter
- Comets ice and dust
- Meteors and Meteorites
- Natural Satellites moons
- The Sun
- Orbital Mechanics
- Orbital Velocity
- Formula v = sqrt GM over R plus h
- Higher altitude lower velocity
- Geostationary at 36000 km
- Time Period
- T = 2 pi R plus h over v
- Higher orbit longer period
- ISS T = 92 minutes
- Kepler Laws
- First Law Ellipses
- Second Law Equal Areas
- Third Law T squared proportional to r cubed
- Orbital Velocity
- ISS
- 400 km altitude
- Since 1998
- 6 astronauts always
- 5 space agencies
- Benefits
- Water purification
- Eye tracking
- Robotic surgery
- Building Blocks
Universe Structure and Components
The map in words
- Universe
- Building Blocks
- Galaxies
- Spiral
- Elliptical
- Irregular
- Stars
- Formation
- Composition
- Lifecycle
- Galaxies
- Solar System
- Sun
- Nuclear Fusion
- Heat and Light
- Planets
- Inner Planets
- Mercury
- Venus
- Earth
- Mars
- Outer Planets
- Jupiter
- Saturn
- Uranus
- Neptune
- Inner Planets
- Other Bodies
- Asteroids
- Comets
- Meteors
- Meteorites
- Sun
- Orbital Mechanics
- Orbital Velocity
- Time Period
- Satellites
- Natural
- Artificial
- Kepler's Laws
- Law of Ellipses
- Law of Equal Areas
- Law of Harmonies
- Space Exploration
- ISS
- International Cooperation
- Applications
- Building Blocks
Timeline showing major events from the Big Bang to present day, illustrating the evolution of the Universe
The map in words
- 13.7 billion years ago
- Big Bang - Matter and energy concentrated in one point
- 13.7 billion years ago
- Rapid expansion and cooling begins
- 300000 years later
- Atoms form - light can travel
- 100 million years later
- First stars and galaxies form
- 4.6 billion years ago
- Solar System forms
- 3.8 billion years ago
- Life begins on Earth
- Today
- Present day - Observable Universe
Explore these maps interactively
Explore DiagramsFrequently Asked Questions
What are the important topics in Universe for Tamil Nadu Board Class 9 Science?
Key topics in Universe include Building Blocks of the Universe, Galaxies and Stars, The Solar System, Other Bodies of the Solar System. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Universe show?
The 3 maps show how the ideas in Universe connect: Universe – Complete Chapter Overview; Universe Structure and Components. Each map is also written out as an outline on this page.
How should I revise Universe for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Universe. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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