Semester (Science, English, Maths) Year 9-10 2019

60 Questions | Total Attempts: 152

SettingsSettingsSettings
Please wait...
Semester (Science, English, Maths) Year 9-10 2019


Questions and Answers
  • 1. 
    Science is everywhere. It gives us the answers to all the questions and helps to understand the world around us. Scientific discoveries have made our life better. Let's have a look at some of them
  • 2. 
    There have been a lot of famous scientists throughout the history of mankind who have made discoveries and breakthroughs that have changed the world. Here are just a few of them. Match the discoveries and the names.
  • 3. 
    A Swedish chemist and inventor who invented dynamite. He/she held more than 350 patents, but he/she is more famous for establishing the awards. They are widely regarded as the most prestigious in the fields of chemistry, physics, literature, medicine and peace.
    • A. 

      Louis Pasteur (1822-1895)

    • B. 

      Niels Bohr (1885 –1962)

    • C. 

      Alfred Nobel (1833 - 1896)

    • D. 

      Marie Curie (1867-1934)

    • E. 

      Dmitri Mendeleev (1834 - 1907)

    • F. 

      Nikola Tesla (1856 –1943)

  • 4. 
    A Danish physicist who studied quantum physics, the structure of the atom, and was among the creators of the atomic bomb. He/she is also considered one of the most important physicists of the  century.
    • A. 

      Dmitri Mendeleev (1834 - 1907)

    • B. 

      Nikola Tesla (1856 –1943)

    • C. 

      Louis Pasteur (1822-1895)

    • D. 

      Niels Bohr (1885 –1962)

    • E. 

      Alfred Nobel (1833 - 1896)

    • F. 

      Marie Curie (1867-1934)

  • 5. 
    A French chemist and microbiologist who is best known for the discovery of vaccinations, pasteurization, and proving that germs cause disease. The discoveries of this scientist led to an understanding of microbes and diseases that has helped to save millions and millions of lives.
    • A. 

      Louis Pasteur (1822-1895)

    • B. 

      Niels Bohr (1885 –1962)

    • C. 

      Alfred Nobel (1833 - 1896)

    • D. 

      Marie Curie (1867-1934)

    • E. 

      Dmitri Mendeleev (1834 - 1907)

    • F. 

      Nikola Tesla (1856 –1943)

  • 6. 
    He/she was a Polish chemist who coined the term radioactivity. He/she also discovered the elements polonium and radium. The unit for measuring radioactivity is named after this scientist.
    • A. 

      Louis Pasteur (1822-1895)

    • B. 

      Niels Bohr (1885 –1962)

    • C. 

      Alfred Nobel (1833 - 1896)

    • D. 

      Marie Curie (1867-1934)

    • E. 

      Dmitri Mendeleev (1834 - 1907)

    • F. 

      Nikola Tesla (1856 –1943)

  • 7. 
    An inventor, electrical engineer, mechanical engineer and physicist. He/she registered more than 300 patents and best known for the contributions to the design of the modern alternating current (AC) electricity supply system.  He/she is often called one of history’s most important inventors whose discoveries were way ahead of the time and continue to influence technology today.
    • A. 

      Louis Pasteur (1822-1895)

    • B. 

      Niels Bohr (1885 –1962)

    • C. 

      Alfred Nobel (1833 - 1896)

    • D. 

      Marie Curie (1867-1934)

    • E. 

      Dmitri Mendeleev (1834 - 1907)

    • F. 

      Nikola Tesla (1856 –1943)

  • 8. 
    The contemporaries of this scientist called him/her "a chemist of genius, first-class physicist, a fruitful researcher in the fields of hydrodynamics, meteorology, geology, certain branches of chemical technology, a thorough expert of chemical industry and industry in general, and an original thinker in the field of economy". He/she became famous for the first periodic table of the elements that made possible to predict the discovery of many more elements. 
    • A. 

      Louis Pasteur (1822-1895)

    • B. 

      Niels Bohr (1885 –1962)

    • C. 

      Alfred Nobel (1833 - 1896)

    • D. 

      Marie Curie (1867-1934)

    • E. 

      Dmitri Mendeleev (1834 - 1907)

    • F. 

      Nikola Tesla (1856 –1943)

  • 9. 
    It was discovered by Isaac Newton.  [Blank]
  • 10. 
    Antoine Lavoisier is often called the father of this branch of science. [Blank]
  • 11. 
    James Watson and Francis Crick discovered the structure of this. [Blank]
  • 12. 
    Einstein came up with the Theory of this. [Blank]
  • 13. 
    Year 2019 is announced as the year of the Periodic Table. It was created by Dmitri Mendeleev 150 years ago. This discovery is a very important step in the development of Chemistry. Chemistry and the Periodic Table of Elements. Questions 11-30.
  • 14. 
    Given that approximately 76% of all the Chlorine atoms on Earth are Chlorine-35. and 24% of them are Chlorine-37, what is the atomic mass of Chlorine?
    • A. 

      It is 35.2 (approx.)

    • B. 

      It is 35: We ignore 37Cl because it’s an isotope.

    • C. 

      It is 36: We take the average of the two masses: (35+37)/2 = 36

    • D. 

      It is approximately 35.5: It’s calculated as follows: 0.76x35+0.24x37 = 35.5 (approx.)

  • 15. 
    Isotopes are atoms of an element ... .
    • A. 

      With the same number of protons but different number of neutrons.

    • B. 

      That are radioactive.

    • C. 

      With a magnetic charge.

    • D. 

      With the same number of electrons but different numbers of protons.

  • 16. 
    A(n)  ___________ is a simple, pure substance that cannot be broken down further into a more simpler kind of substance.
    • A. 

      Alloy

    • B. 

      Compound

    • C. 

      Element

    • D. 

      Crystal

  • 17. 
    Is Nitrogen a good conductor of electricity?
    • A. 

      Yes, it is.

    • B. 

      It’s an insulator in normal temperature, but becomes a conductor if liquified

    • C. 

      Not at all! Nitrogen is an insulator

    • D. 

      Yes, in most situations.

  • 18. 
    An atom has 9 protons and 10 neutrons. Its mass number is ...
    • A. 

      1

    • B. 

      19

    • C. 

      9

    • D. 

      10

  • 19. 
    A chlorine atom attains an octet by
    • A. 

      Gaining one electron

    • B. 

      Gaining eight electrons

    • C. 

      Losing one electron

    • D. 

      Losing five electrons

  • 20. 
    An element in Period 3, Group 7 has ...
    • A. 

      7 electrons as total, 3 of them in its valence layer

    • B. 

      3 electrons in its valence layer and 7 energy levels

    • C. 

      3 electrons in its valence layer and 4 energy levels

    • D. 

      7 electrons in its valence layer and 3 energy levels

  • 21. 
    Which elements are the least reactive?
    • A. 

      Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn)

    • B. 

      Florine (F), Chlorine(Cl), Bromine(Br) and Iodine(I).

    • C. 

      The alkali metals: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs).

    • D. 

      Transition metals, such as: chromium(Cr), manganese(Mn), iron(Fe), cobalt(Co), nickel(Ni) and copper(Cu).

  • 22. 
    Which metal is the best conductor of electricity? 
    • A. 

      Iron

    • B. 

      Copper

    • C. 

      Silver

    • D. 

      Gold

  • 23. 
    Atoms with the same elements with different numbers of neutrons are called .... .
    • A. 

      Isomers.

    • B. 

      Metalloids.

    • C. 

      Isotopes.

    • D. 

      Polymers.

  • 24. 
    Which elements are liquids in normal temperature?
    • A. 

      Florine, Chlorine, Bromine and Iodine.

    • B. 

      Only Chlorine, Bromine.

    • C. 

      Only Bromine and Mercury.

    • D. 

      No elements are liquids in normal temperature.

  • 25. 
    Hydrogen atom has just one electron located at the first energy layer (orbit) whose capacity is 2 electrons. Therefore hydrogen is considered as:
    • A. 

      A non-metal

    • B. 

      A halogen (like Florine, Chlorine, Bromine and Iodine), because it’s like the halogens, lacks for just one electron to complete its valence shell (outer shell).

    • C. 

      An alkali metal (like lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs)), because it’s like them, possess just one electron at its valence shell.

    • D. 

      Both as a halogen and an alkali metal; it has a dual nature.

Back to Top Back to top