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Physical Science (Grade 8) Midterm — Units 1–2

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Science Grade 8 20 multiple choice + 1 written

Free printable Physical Science midterm (Grade 8): 20 multiple-choice questions plus 1 written response covering Matter & Its Properties, Atoms & the Periodic Table. Answer key included — customize it in the Midterm Maker.

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Physical Science (Grade 8) Midterm — Units 1–2
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Directions: Read each question carefully and choose the best answer. Answer the written response in complete sentences.

Covers: Matter & Its Properties · Atoms & the Periodic Table

Part 1: Multiple Choice

  1. Which of these is a mixture?
    1. A. Pure water
    2. B. Oxygen gas
    3. C. Table salt
    4. D. Salt water
  2. A rock has a mass of 60 g and a volume of 20 cm³. What is its density?
    1. A. 0.33 g/cm³
    2. B. 3 g/cm³
    3. C. 80 g/cm³
    4. D. 1200 g/cm³
  3. In which state of matter do particles move fastest and spread farthest apart?
    1. A. Gas
    2. B. Liquid
    3. C. Solid
    4. D. Frozen solid
  4. Which of these is a chemical property?
    1. A. Boiling point
    2. B. Flammability
    3. C. Color
    4. D. Density
  5. Dry ice changing directly from a solid to a gas is called what?
    1. A. Sublimation
    2. B. Condensation
    3. C. Melting
    4. D. Evaporation
  6. Which of these is a physical change?
    1. A. Ice melting
    2. B. Iron rusting
    3. C. Wood burning
    4. D. A cake baking
  7. A metal cube has a volume of 5 cm³ and a density of 4 g/cm³. What is its mass?
    1. A. 20 g
    2. B. 0.8 g
    3. C. 1.25 g
    4. D. 9 g
  8. Water has a density of 1.0 g/cm³. Which block will float in water?
    1. A. A block with density 0.8 g/cm³
    2. B. A block with density 2.7 g/cm³
    3. C. A block with density 11.3 g/cm³
    4. D. A block with density 1.3 g/cm³
  9. At sea level, at what temperature does pure water boil?
    1. A. 0°C
    2. B. 100°C
    3. C. 32°C
    4. D. 212°C
  10. Which state of matter has a definite volume but no definite shape?
    1. A. Gas
    2. B. Solid
    3. C. Liquid
    4. D. Plasma
  11. Elements in the same group react in similar ways because they have the same number of what?
    1. A. Neutrons
    2. B. Protons
    3. C. Total electrons
    4. D. Valence electrons
  12. What element does the symbol Na represent?
    1. A. Nitrogen
    2. B. Nickel
    3. C. Sodium
    4. D. Neon
  13. An atom has 6 protons and 6 neutrons. What is its mass number?
    1. A. 12
    2. B. 6
    3. C. 36
    4. D. 18
  14. Which particle in the nucleus has a positive charge?
    1. A. Neutron
    2. B. Photon
    3. C. Proton
    4. D. Electron
  15. Which group of elements is known for being very unreactive?
    1. A. Halogens
    2. B. Alkali metals
    3. C. Noble gases
    4. D. Alkaline earth metals
  16. A sodium atom has atomic number 11 and mass number 23. How many neutrons does it have?
    1. A. 12
    2. B. 11
    3. C. 23
    4. D. 34
  17. Which particle in an atom has no electric charge?
    1. A. Neutron
    2. B. Proton
    3. C. Electron
    4. D. Ion
  18. An element's atomic number equals the number of which particle?
    1. A. Electron shells
    2. B. Neutrons
    3. C. Isotopes
    4. D. Protons
  19. What are the vertical columns of the periodic table called?
    1. A. Periods
    2. B. Series
    3. C. Rows
    4. D. Groups
  20. Which element has atomic number 8?
    1. A. Neon
    2. B. Oxygen
    3. C. Nitrogen
    4. D. Carbon

Part 2: Written Response

  1. Describe the structure of an atom and explain how the periodic table is organized. Use oxygen as an example.

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