Physical Science (Grade 8) Midterm — Quick Check, Units 1–3
← Midterm Library / Science / Physical Science
Free printable Physical Science midterm (Grade 8): 10 multiple-choice questions covering Matter & Its Properties, Atoms & the Periodic Table, Chemical Reactions. Answer key included — customize it in the Midterm Maker.
Physical Science (Grade 8) Midterm — Quick Check, Units 1–3
Name: Date: Period:
Directions: Read each question carefully and choose the best answer.
Covers: Matter & Its Properties · Atoms & the Periodic Table · Chemical Reactions
Part 1: Multiple Choice
-
In which state of matter do particles move fastest and spread farthest apart?
- A. Gas
- B. Liquid
- C. Solid
- D. Frozen solid
-
A metal cube has a volume of 5 cm³ and a density of 4 g/cm³. What is its mass?
- A. 20 g
- B. 0.8 g
- C. 1.25 g
- D. 9 g
-
Water has a density of 1.0 g/cm³. Which block will float in water?
- A. A block with density 0.8 g/cm³
- B. A block with density 2.7 g/cm³
- C. A block with density 11.3 g/cm³
- D. A block with density 1.3 g/cm³
-
What are the vertical columns of the periodic table called?
- A. Periods
- B. Series
- C. Rows
- D. Groups
-
Which particle in the nucleus has a positive charge?
- A. Neutron
- B. Photon
- C. Proton
- D. Electron
-
Which element has atomic number 8?
- A. Neon
- B. Oxygen
- C. Nitrogen
- D. Carbon
-
How many hydrogen atoms are shown in 2H₂O?
- A. 2
- B. 6
- C. 4
- D. 3
-
In a sealed container, 12 g of substance A reacts completely with 8 g of substance B. What is the total mass of the products?
- A. 4 g
- B. 12 g
- C. 20 g
- D. 96 g
-
Which observation is the best evidence that a chemical reaction occurred?
- A. An ice cube melts
- B. Gas bubbles form when baking soda and vinegar mix
- C. Sugar dissolves in water
- D. A glass cup breaks
-
A reaction that releases heat to its surroundings is called what?
- A. Endothermic
- B. Exothermic
- C. Physical
- D. Neutral
Answer Key — Physical Science (Grade 8) Midterm — Quick Check, Units 1–3
- A — Gas Gas particles have the most energy and fill any container.
- A — 20 g Mass = density × volume = 4 × 5 = 20 g.
- A — A block with density 0.8 g/cm³ Objects less dense than water float.
- D — Groups Columns are groups (families); rows are periods.
- C — Proton Protons are positive; neutrons have no charge.
- B — Oxygen Oxygen has 8 protons.
- C — 4 Each H₂O has 2 hydrogen atoms; 2 × 2 = 4.
- C — 20 g Mass is conserved: 12 g + 8 g = 20 g.
- B — Gas bubbles form when baking soda and vinegar mix Formation of a new gas signals a new substance.
- B — Exothermic Exo- means 'out'; energy flows out as heat.