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Eighth Grade (Grade 8) Bonds and Mixing Questions

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Grade 8 Bonds and Mixing
Salad dressing is a heterogeneous mixture.
  1. True
  2. False
Grade 8 Bonds and Mixing
Substances in a mixture keep their own properties.
  1. True
  2. False
Grade 8 Bonds and Mixing
Which sub-atomic particle is most important in determining chemical bonding?
  1. Protons
  2. Neutrons
  3. Electrons
  4. Ions
Grade 8 Bonds and Mixing
Which of the following statements explains why oxygen is classified as a pure substance and air is classified as a mixture?
  1. Oxygen is more reactive than air.
  2. Oxygen has a higher density than air.
  3. Oxygen undergoes phase changes, whereas air is always a gas.
  4. Oxygen contains only one substance, but air contains several substances.
Grade 8 Bonds and Mixing
Which is not an appearance of a solution?
  1. Clear
  2. Transparent
  3. Heterogeneous
  4. Homogeneous
Grade 8 Bonds and Mixing
Which of the following is a mixture?
  1. copper
  2. diamond
  3. sand (silicon dioxide)
  4. seawater
Grade 8 Bonds and Mixing
Which of the following would be considered heterogenous matter?
  1. Aluminum
  2. Pizza
  3. Sugar
  4. Salt Water
Grade 8 Bonds and Mixing
What is often called the universal solvent?
  1. sodium chloride
  2. oxygen
  3. sodium
  4. water
Grade 8 Bonds and Mixing
A chemical bond is
  1. a group of atoms joined together.
  2. the basic particle of matter.
  3. the force that holds two atoms together.
  4. a substance formed from the chemical combination of two or more atoms.
Grade 8 Bonds and Mixing
Explain how metallic bonds form.
Grade 8 Bonds and Mixing
Gelatin is an example of a colloid.
  1. True
  2. False
Grade 8 Bonds and Mixing
Muddy water is an example of a suspension.
  1. True
  2. False
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