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  - Nuclear Chemistry
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  - Green Chemistry
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  - Materials Chemistry
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  - Botany Plant Biology
    - Plant Anatomy 38
    - Plant Morphology 5
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    - Photosynthesis 52
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    - Plant Pathology 6
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    - Annelida 7
    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
    - Chordata 5
    - Fish 76
    - Amphibians 10
    - Reptiles 14
    - Birds 5
    - Mammals 106
    - Anatomy 17
    - Physiology 24
    - Reproduction 26
    - Development 6
    - Behavior 63
  - Microbiology
    - Microbial Structure 5
    - Bacteriology 33
    - Virology 33
    - Mycology 16
    - Parasitology 55
    - Microbial Genetics 5
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  - Biotechnology
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    - Bioinformatics 6
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  - Molecular Biology
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    - Bio Enzymes 21
    - Bio Nucleic Acids 5
    - Biochemical Vitamins 5
    - Bio Minerals 6
    - Bio Metabolism 60
    - Cellular Respiration 21
    - Nitrogen Metabolism 5
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  - Developmental Biology
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    - Metamorphosis 6
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- Earth & Space Science
  - Geology
    - Minerals 32
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    - Geological Rock Cycle 17
    - Plate Tectonics 43
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    - Geological Earthquakes 5
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    - Marine Life 47
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  - Celestial Mechanics & Orbits
    - Orbital Motion 5
    - Kepler Laws 5
    - Newton Laws 5
    - Orbital Gravity 5
    - Eclipses 6
    - Precession 5
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9th Grade Radial Velocity Quizzes, Questions & Answers

9th Grade

Top Trending Radial Velocity Quizzes

Celestial Tug-of-War: Why Stars Wobble Quiz

It’s a two-way street in space. While a star pulls on a planet, the planet’s gravity also gives the star a tiny, rhythmic tug. This why stars wobble quiz explores the gravitational dance that gives away a...

Questions: 20 | Attempts: 10 | Last updated: Feb 24, 2026

Sample Question 1
What is the fundamental reason why stars wobble when they have orbiting planets?

Stars are naturally unstable and shake

The star and planet orbit a common center of mass

The star is being pushed by solar winds

The planet's magnetic field repels the star

The star is trying to escape the galaxy

Sample Question 2
A gravity tug from planets is only possible if the planet is larger than the star itself.

True

False

The Planet Hunters: Kepler and TESS Missions Quiz

The dedicated hunters of the deep sky. Specialized telescopes orbiting Earth have found thousands of planets by staring at the stars for years. This kepler and tess missions quiz highlights the history and tech behind our...

Questions: 20 | Attempts: 10 | Last updated: Feb 20, 2026

Sample Question 1
What was the primary scientific objective of the Kepler mission?

To find life on Mars

To determine how common Earth-sized planets are in the Milky Way

To photograph the surfaces of distant stars

To measure the expansion of the universe

To study the rings of Saturn

Sample Question 2
Compared to Kepler, the TESS mission is designed to survey a much larger area of the sky.

True

False

9th Grade Radial Velocity Quizzes, Questions & Answers

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