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Eighth Grade (Grade 8) Science Questions

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Grade 8 :: Biochemical Pathways by rebmidwife
What is the process where cells obtain energy from sugar molecules?
  1. biotic
  2. nitrogen cycle
  3. respiration
  4. food chains
Grade 8 :: Cell Structure and Function by Jackson_Dawg
Grade 8 :: Simple Machines by PrangeC
Grade 8 :: Simple Machines by PrangeC
An object being lifted or moved by a machine is a:
  1. fulcrum
  2. load
  3. work
  4. force
  5. friction
Grade 8 :: Circulatory and Immune Systems by Gary_Lanham
Grade 8 :: Acids and Bases by LBeth
Grade 8 :: Communities, Populations, and Ecosystems by Occulus
Grade 8 :: Forces and Motion by DrWho
Grade 8 :: Circulatory and Immune Systems by sullz9999999999
What do red blood cells not do?
  1. Carry oxygen.
  2. Carry food and nutrients.
  3. Take carbon dioxide or waste away.
  4. Fight germs.
Grade 8 :: Planetary Motion by LBeth

This question is a part of a group with common instructions. View group »

Which statement best describes tides experienced on Earth when the Sun, Moon, and Earth are positioned as shown in the diagram?
Spring Tide
  1. maximum high tides, minimum low tides
  2. maximum high tides, maximum low tides
  3. minimum high tides, maximum low tides
  4. minimum high tides, minimum low tides
Grade 8 :: Waves and Sound by Occulus
Which best describes electromagnetic energy?
  1. moves electrons
  2. travels through space as waves
  3. forms chemical bonds
  4. generates electrical energy
Grade 8 :: Properties of Matter by aefrith
Grade 8 :: Science by konaman
What statement can clearly explain the basic reason for the Earth's seasons:
  1. As the sun moves away from Earth the seasons will change
  2. As the Earth revolves around the sun, the seasons change
  3. As the Earth revolves around the sun, the Earth's tilt will result in either the northern or southern hemisphere getting more exposure from the direct rays of the sun
  4. none of these are true
Grade 8 :: Biotic and Abiotic by Occulus
Circle the letter of EACH choice that is a biotic factor in a prairie dog ecosystem.
  1. Grass and other plants that the prairie dog eats
  2. Hawks, ferrets, and other animals that hunt prairie dogs
  3. The soil that provides the prairie dog with a home.
  4. Worms, fungi, and bacteria that also live in the soil.
Grade 8 :: Acids and Bases by LBeth
The table shows the pH of four substances.
pH Values
SubstancepH
Blood7.3
Orange Juice4.0
Ammonia11.0
Milk6.5

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 :: Skin, Skeleton, and Muscles by Britt2108
The adult body is made up of how many bones?
  1. 350
  2. 206
  3. 296
  4. 256
  5. All the above
  6. None of the above
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