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Eighth Grade (Grade 8) Science Questions

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Grade 8 :: Acids and Bases by LBeth
Grade 8 :: Forces and Motion by DrWho
Grade 8 :: Simple Machines by PrangeC
Grade 8 :: Circulatory and Immune Systems by sullz9999999999
What do red blood cells not do?
  1. Find germs.
  2. Eat foreign things in your body.
  3. Kill infections.
  4. Carry nutrients.
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 :: Properties of Matter by Kimmy_sutton
Grade 8 :: Properties of Matter by aefrith
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 :: 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 :: Properties of Matter by aefrith
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 :: Food Chains and Webs by sharrik
Which best describes the purpose of a food chain?
  1. shows what organisms eat which foods
  2. shows the importance of the sun's energy
  3. predator/prey relationships between organisms
  4. shows transfer of energy between trophic levels
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