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Ninth Grade (Grade 9) Science Questions

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Grade 9 Tectonics
Scientists theorize that the outer core of Earth is liquid. What fact about S waves support that theory?
  1. S waves travel at medium speed.
  2. S waves do moderate damage.
  3. S waves travel on a vertical plane.
  4. S waves travel in solids only.
Grade 9 Solvents, Solutes, and Solubility
Electrolytes are strong conductors of electricity in solution.
  1. True
  2. False
Grade 9 Cell Structure and Function
Where does glycolysis occur?
  1. mitochondria
  2. chloroplast
  3. chlorophyll
  4. cytoplasm
Grade 9 DNA, RNA, and Genetics
Proteins that block the passage of RNA polymerase are
  1. operons.
  2. activators.
  3. repressors.
  4. promoters.
Grade 9 DNA, RNA, and Genetics
What is the function of tRNA?
  1. to match up with mRNA, carrying an amino acid
  2. to copy the DNA that goes from the nucleus to the ribosome
  3. to serve as the site where a polypeptide chain is made from amino acids
  4. none of these
Grade 9 Protists and Fungi
A carpet or mat of entangled hair-like tubular structures (hyphae) is
  1. mycelium.
  2. protista.
  3. fungus.
  4. mold.
Grade 9 Solvents, Solutes, and Solubility
Oil and vinegar mixed for salad dressing is an example of solution.
  1. True
  2. False
Grade 9 Macromolecules
Starch and cellulose are examples of                 that are found in plants.
  1. amino acids
  2. monosaccharides
  3. polysaccharides
  4. proteins
Grade 9 Rocks
What rock is shown?
Rock - Metamorphic - Marble
  1. schist
  2. marble
  3. anthracite coal
  4. metaconglomerate
Grade 9 Geomorphology
Which term refers to the movement of weathered material down a slope under the influence of gravity?
  1. frost shattering
  2. mechanical weathering
  3. exfoliation
  4. mass wasting
  5. erosion
Grade 9 Periodic Table and Elements
Tin is a nonmetallic element.
  1. True
  2. False
Grade 9 DNA, RNA, and Genetics
Which event occurs directly after the DNA molecule is unzipped during the replication process?
  1. Mismatched nucleotide bases are identified and replaced.
  2. Free-floating nucleotides pair up with exposed bases.
  3. Identical double-stranded DNA molecules are formed.
  4. Enzymes break hydrogen bonds between base pairs.
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