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Ninth Grade (Grade 9) Science Questions

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Grade 9 :: Molecules and Compounds by LBeth
[math]NH_4^+[/math]
  1. cyanide
  2. hydroxide
  3. hydronium
  4. ammonium
Grade 9 :: Molecules and Compounds by LBeth
[math]O_2^(2-[/math]
  1. oxalate
  2. peroxide
  3. hydroxide
  4. hydronium
Grade 9 :: Geomorphology by outom964
The breaking down of rocks on the earth's surface s                      .
  1. weathering
  2. chemical weathering
  3. erosion
  4. mechanical weathering
Grade 9 :: Geomorphology by outom964
Water freezing in the cracks of rocks is an example of                      .
  1. deposition
  2. mechanical weathering
  3. chemical weathering
  4. erosion
Grade 9 :: Molecules and Compounds by LBeth
[math]HCO_3^-[/math]
  1. chlorite
  2. chlorate
  3. hydrogen sulfate
  4. hydrogen carbonate
Grade 9 :: Molecules and Compounds by LBeth
[math]C_2O_4^(2-[/math]
  1. oxalate
  2. peroxide
  3. hydroxide
  4. carbonate
Grade 9 :: Molecules and Compounds by LBeth
[math]PO_4^(3-[/math]
  1. acetate
  2. phosphate
  3. perchlorate
  4. phosphonium
Grade 9 :: Energy and Work by der1228
Which form of energy does a plant store when light is transformed during photosynthesis?
  1. chemical energy
  2. thermal energy
  3. mechanical energy
  4. electrical energy
Grade 9 :: Evolution by PMISIAS
How can temporal isolation lead to speciation?
  1. If two populations do not like each other, this may lead to the formation of a separate species
  2. If two populations reproduce in different ways, this may lead them to become separate species
  3. If two populations are separated by a geographic barrier, this will cause them to reproduce with other members of their own species which may them to become separate species
  4. If two populations reproduce at different times, they are unlikely to reproduce with each other which may cause them to become separate species
Grade 9 :: Molecules and Compounds by LBeth
[math]S_2O_3^(2-[/math]
  1. sulfite
  2. sulfate
  3. thiosulfate
  4. hydrogen sulfate
Grade 9 :: Molecules and Compounds by LBeth
[math]ClO_4^-[/math]
  1. chlorite
  2. chlorate
  3. perchlorate
  4. hypochlorite
Grade 9 :: Molecules and Compounds by LBeth
[math]H_3O^+[/math]
  1. peroxide
  2. hydroxide
  3. hydronium
  4. ammonium
Grade 9 :: Molecules and Compounds by LBeth
[math]C_2H_3O_2^-[/math]
  1. acetate
  2. oxalate
  3. hydroxide
  4. carbonate
Grade 9 :: Molecules and Compounds by LBeth
[math]NO_2^-[/math]
  1. nitrite
  2. nitrate
  3. cyanide
  4. ammonium
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