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Eighth Grade (Grade 8) Science Questions

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Grade 8 Respiration, Digestion, and Excretion
Carbohydrate digestion starts in the
  1. small intestine.
  2. esophagus.
  3. stomach.
  4. mouth.
Grade 8 Scientific Method
A factor that can change in an experiment is a
  1. conclusion.
  2. variable.
  3. hypothesis.
  4. theory.
Grade 8 Forces and Motion
This is friction where an object moves through liquid or gas.
  1. Static
  2. Fluid
  3. Sliding
  4. Rolling
Grade 8 Properties of Matter
Lisa discovered that water is different from most other liquids because of its
  1. color.
  2. wetness.
  3. surface tension.
  4. flow rate.
Grade 8 Waves and Sound
Gamma Rays are related to X-rays.
  1. True
  2. False
Grade 8 Skin, Skeleton, and Muscles
The skin, or                   , is composed of several types of tissues.
  1. serous membrane
  2. mucous membrane
  3. cutaneous membrane
  4. synovial membrane
Grade 8 Cell Structure and Function
Humans are composed of                 cells.
  1. plant
  2. eukaryotic
  3. bacterial
  4. prokaryotic
  5. archaeal
Grade 8 Light and Optics
Which of the following is NOT part of the electromagnetic spectrum?
  1. Radio waves
  2. X-rays
  3. Ultrasonic waves
  4. Microwaves
Grade 8 Periodic Table and Elements
This is a metallic element that reacts violently with water.
  1. copper
  2. iron
  3. silver
  4. sodium
Grade 8 DNA, RNA, and Genetics
What describes a segment of DNA that determines a specific trait in a person, such as attached earlobes?
  1. a gene
  2. a phenotype
  3. a chromosome
  4. a characteristic
Grade 8 Circulatory and Immune Systems
The heart, veins, arteries, capillaries, and blood are parts of the                 system.
  1. lymphatic
  2. cardiovascular
  3. respiratory
  4. circulatory
Grade 8 Forces and Motion
The force of gravity acting on an object is called what?
  1. weight
  2. force
  3. gravity
  4. mechanical system
Grade 8 Properties of Matter
What is the density of a substance that has a mass of 20 g and volume of 10 mL?
  1. 0.5 g/mL
  2. 2.0 g/mL
  3. 10 g/mL
  4. 200 g/mL
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