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    - Ceramics 5
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- Biology
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- Earth and Space Science
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  - Soil Science
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- Astronomy
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  - Cosmology
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  - Exoplanets
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    - Atmospheres 1
  - Astrobiology
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  - Celestial Mechanics and Orbits
    - Orbital Motion 7
    - Kepler Laws 3
    - Newton Laws 60
    - Orbital Gravity 1
    - Eclipses 7
    - Retrograde Motion 3
    - Perturbations 5
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Math

8th Grade Natural Products Quizzes, Questions & Answers

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Chemistry Exam: Quiz Questions!

Are you ready for your chemistry exam? Chemistry is the research of the matter, energy, and the relationship between them. Chemists become encouraged when they figure out how a chemical transformation occurs. It plays a crucial...

Questions: 10 | Attempts: 120 | Last updated: Mar 21, 2023

Sample Question
Four elements A, B, C, and D: the element (A) used as a catalyst in the preparation of Ammonia gas in industry, one of the compounds of the element (B) used as an oxidizing agent in the dry cell, the element (C) used in the manufacture of heating coils and element (D) is the first discovered metal. Based on the previous information, the correct arrange of these four elements will be:

Fe-Ni-Cu-Mn

Mn-V-Fe-Zn

V-Zn-Mn-Fe

Fe-Mn-Ni-Cu

Types Of Essential Oils! Trivia Facts Quiz

Essential oils are pleasant, liquid substances obtained from plants. They usually contain volatile chemical compounds that are hydrophobic in nature. These oils are considered essential because essential oils have the...

Questions: 10 | Attempts: 315 | Last updated: Mar 21, 2023

Sample Question
What separation method is involved in the production of essential oil?

Distillation

Fractional distillation

Decantation

Filtration