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Eighth Grade (Grade 8) Chemistry Questions

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Grade 8 Matter
What is a gas?
  1. It has a definite shape and volume.
  2. It has a definite shape, but no definite volume.
  3. It has no definite shape or volume.
  4. It has no definite shape, but a definite volume.
Grade 8 Periodic Table and Elements
Grade 8 Matter
Grade 8 Matter
Because of loosely packed molecules, a liquid                                 .
  1. resists flowing
  2. takes the shape of its container
  3. forms droplets
  4. none of the above
Grade 8 Matter
Grade 8 Acids and Bases
The table shows the pH of four substances.
pH Values
Orange Juice4.0

Which lists the substances from least to most acidic?
  1. ammonia, blood, milk, orange juice
  2. orange juice, milk, blood, ammonia
  3. ammonia, milk, blood, orange juice
  4. orange juice, blood, milk, ammonia
Grade 8 Atomic Structure
Atoms consist of which of the following?
  1. Protons
  2. Molecules
  3. Neutrons
  4. Electrons
Grade 8 Periodic Table and Elements
In the modern Periodic Table, elements are arranged
  1. according to atomic mass.
  2. according to atomic number.
  3. in alphabetical order.
  4. according to the number of neutrons in their nuclei.
Grade 8 Matter
Sublimation is a change from a
  1. solid to a liquid.
  2. gas to a liquid.
  3. solid to a gas.
  4. liquid to a solid.
Grade 8 Biochemical Pathways
In what process do cells obtain energy from sugar molecules?
  1. photosynthesis
  2. nitrogen cycle
  3. respiration
  4. food chains
Grade 8 Matter
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Matter
A liquid has a                     .
  1. constant temperature
  2. definite shape
  3. crystal structure
  4. definite volume
Grade 8 Periodic Table and Elements
Which best describes oxygen?
  1. Oxygen is a halogen.
  2. Oxygen is a nonmetal.
  3. Oxygen is a noble gas.
  4. Oxygen is a rare earth element.
Grade 8 Periodic Table and Elements
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