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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Biochemical Pathways
The process yeast carry out that causes bread dough to rise is                         .
  1. alcoholic fermentation
  2. cellular respiration
  3. lactic acid fermentation
  4. aerobic fermentation
Grade 9 Properties of Matter
A chemical change refers to                                                                               .
  1. a change in matter when matter independent changes form.
  2. a change in matter that does not change composition.
  3. a change in matter that leads to melting or evaporation.
  4. a change in matter that occurs when substances combine to form new substances.
Grade 9 Periodic Table and Elements
Grade 9 Atomic Structure
Why does an atom have no net electric charge?
  1. Its subatomic particles carry no electrical charge.
  2. The positively charged protons cancel out the negatively charged neutrons.
  3. The positively charged neutrons cancel out the negatively charged electrons.
  4. The positively charged protons cancel out the negatively charged electrons.
Grade 9 Atomic Structure
                is equal to the number of protons and the number of neutrons.
  1. Atomic number
  2. Ionic number
  3. Covalent number
  4. Atomic Mass
  5. Atoms
Grade 9 Periodic Table and Elements
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Atoms become positively charged when it                 .
  1. shares electrons
  2. loses electrons
  3. loses protons
  4. gains electrons
  5. gains protons
Grade 9 Atomic Structure
Grade 9 Periodic Table and Elements
Grade 9 Periodic Table and Elements
Vertical columns are called                .
  1. periods
  2. metals
  3. metalloids
  4. groups
  5. non-metals
Grade 9 Bonds and Mixing
A mixture of two or more uniformly dispersed substances.
  1. Solution
  2. Colloid
  3. suspension
  4. Solvent
  5. Solute
Grade 9 Atomic Structure
What are the three particles that make up an atom?
  1. protons, neutrons, and isotopes
  2. neutrons, isotopes, and electrons
  3. positives, negatives, and electrons
  4. protons, neutrons, and electrons
Grade 9 Acids and Bases
Grade 9 Matter
Grade 9 Atomic Structure
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