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STEM QUALIFYING EXAM

Quiz by zammysoza

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40 questions
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  • Q1

    Which of the following statement is not true about atoms?

    Atoms are very small particles that make up an element.

    Atoms of a particular element are alike in size, mass and structure.

    Atoms of different elements differ in size, mass, and structure.

    Atoms can be divided during an ordinary chemical reaction

    120s
  • Q2

    It has no definite shape and no definite volume. It takes the shape of its container and its volume is sensitive to changes in temperature and pressure of its container. So its compressibility is very high.

    Solid                            

    Plasma

    Liquid                                                

    Gas

    120s
  • Q3

    Employs repeated or continuous distillation; components are collected in fractions. Liquid mixtures with mutually soluble or miscible components and components have different boiling points.

    Fractional Distillation 

    Centrifugation                      

    Flotation

    Filtration                      

    120s
  • Q4

    Which elements have an octet in their ground state?

    Period 7    

    Group 1A 

    Group 8A

    Period1

    120s
  • Q5

    Used in cooling ice cream (as dry ice) and additive in fire extinguisher.

    N2

    CO2

    SO2

     Cl2 

    120s
  • Q6

    The statement that is not a principle of the cell theory is ________________.

    All matter consists of at least one cell.

    Cells are the basic unit of life. 

    All organisms are made of one or more cells

    All cells arise from pre-existing cells.                       

    120s
  • Q7

    The cell organelle that digests molecules, old organelles, and foreign substances is the ____________.

    Chloroplast                  

    Golgi apparatus    

    Mitochondrion

    Lysosome                

    120s
  • Q8

    If the chloroplasts of a plant cell are damaged, which will it be unable to do?

    Excrete waste materials

    Give instruction for the cell to reproduce

    Make food for the cell 

    Protect the cell   

    120s
  • Q9

    Which of the following is not true about meiosis?

    the genetic diversity it produces among sexual organisms can help make a species population more unstable by producing a wider variety of traits for the process of natural selection to act upon.

     It restricts the multiplication of chromosome number and maintains the stabilityof the species.

     It maintains the same chromosome number in the sexually reproducing organisms.

    Meiosis enables genetic diversity

    120s
  • Q10

    In what way are photosynthesis and cellular respiration different?

     Cellular respiration stores ATP, while photosynthesis releases ATP.

    Photosynthesis releases energy, while cellular respiration stores energy.

    Cellular respiration produces oxygen, while photosynthesis uses oxygen.

    Photosynthesis uses carbon dioxide, while cellular respiration produces carbon dioxide

    120s
  • Q11

    Why is ATP important to living things?

    It helps maintain the fluidity of cell membranes.

    It identifies DNA start sequences for transcription.

    It aids in protein folding and coiling.

    It is used to capture and transfer energy.

    120s
  • Q12

    In which layer do convection currents occur?

    The outer core

    The inner core

    The mantle        

    The crust

    120s
  • Q13

    What is the composition of the lithosphere?

    The lower mantle and outer core

    The continental and oceanic crust     

    The lower mantle

    The crust and uppermost mantle

    120s
  • Q14

    The most abundant elements found in the earth’s crust.

    Silicon and Aluminum 

    Iron and Nickel

    Hydrogen and Oxygen

    Gold and Nickel

    120s
  • Q15

    Which of the following was not used by Wegener as evidence of continental drift?

    Fit of the continents                               

    Magnetic reversals on the sea floor

    Evidence of glacial scratches  

    Fossils that were found on different countries.

    120s

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