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Eighth Grade (Grade 8) Science Questions

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Grade 8 Waves and Sound
The frequency of a wave is measured in                       .
  1. Meters per second (m/s)
  2. Watts (W)
  3. Hertz (Hz)
  4. Joules (J)
Grade 8 Waves and Sound
                is an example of a mechanical wave.
  1. Radio waves
  2. X-rays
  3. Sound waves
  4. Light waves
Grade 8 Forces and Motion
Your car has a mass of 2,500 kg and a force of 5,000 N. How fast will it accelerate?
  1. 20ms2
  2. 2ms2
  3. 0.5ms2
  4. 120ms2
Grade 8 Periodic Table and Elements
The Lewis structure for the element copper is shown.
Electron-Dot Diagram - Carbon
  1. True
  2. False
Grade 8 Chemistry
A reaction between an acid and a base is called                .
  1. catalyzation
  2. nitrification
  3. neutralization
  4. polymerization
Grade 8 Cell Structure and Function
A gorilla is a type of organism that has more than one cell. Therefore, the gorilla is
  1. unicellular.
  2. tricellular.
  3. multicellular.
  4. single-celled.
Grade 8 Communities, Populations, and Ecosystems
A                 is a place where an organism lives.
  1. habitat
  2. prey
  3. predator
  4. decomposer
Grade 8 Botany
What happens last in the process of photosynthesis?
  1. The plant captures the Sun's energy.
  2. Water is taken up by the plant's roots.
  3. Oxygen exits the leaf.
  4. Carbon dioxide enters the leaf.
Grade 8 Minerals
The mineral galena tends to break into perfect cubes. Which mineral property does this describe?
  1. fracture
  2. cleavage
  3. crystal habit
  4. specific gravity
Grade 8 DNA, RNA, and Genetics
What is homozygous?
  1. having two identical alleles for a trait
  2. having two different alleles for a trait
Grade 8 Planetary Motion
During a solar eclipse, the shadow of                 falls on                .
  1. Earth; the Sun
  2. the Sun; Earth
  3. Earth; the Moon
  4. the Moon; Earth
Grade 8 Energy and Momentum
Which statement is true about the potential energy of the ball at E and F?
Potential Energy
  1. The potential energy at both E and F is 0 joules.
  2. The potential energy at both E and F is greater than 0 joules.
  3. The potential energy at F is 0 joules and at E is greater than 0 joules.
  4. The potential energy at E is 0 joules and at F is greater than 0 joules.
Grade 8 Magnetism and Electricity
In a circuit schematic, this symbol would represent a(n)                        .
Switch Open
  1. open switch
  2. closed switch
  3. fluorescent light bulb
  4. incandescent light bulb
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