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Eighth Grade (Grade 8) Science Questions

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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 :: Acids and Bases by LBeth
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 :: Forces and Motion by DrWho
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 :: Cell Structure and Function by Jackson_Dawg
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
Orange Juice4.0

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 :: Biomes by Occulus
Ponds and lakes represent what type of biome?
  1. flowing-water
  2. wetlands
  3. standing-water
  4. intertidal zones
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
Grade 8 :: Cell Structure and Function by LBeth
Which best identifies the images in order: A, B, C, D?
Eukaryotic DNA Without Text Labels
  1. cell, chromosome, nucleus, DNA
  2. DNA, nucleus, chromosome, cell
  3. cell, nucleus, chromosome, DNA
  4. DNA, chromosome, nucleus, cell
Grade 8 :: Historical Geology by thiels
Grade 8 :: Biochemical Pathways by rebmidwife
The process where cells obtain energy from sugar molecules is called:
  1. biotic
  2. nitrogen cycle
  3. respiration
  4. food chains
Grade 8 :: Forces and Motion by jlovering
Grade 8 :: Historical Geology by thiels
Which of the following is not true for the second mass extinction?
  1. half of all animal and plant life died
  2. dinosaurs became extinct
  3. the primordial ooze occurred
  4. the sun was blocked and much plant life died, resulting in many animals dying
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