Grade 8 NC EOG Science questions with
answers
Which is the best example of a pure substance?
A. peanuts
B. milk
C. gold
D. air - ** VERIFIED ANSWERS **✔✔gold
Which statement best explains how periods on the periodic table are organized?
A. increasing atomic number from left to right
B. increasing number of neutrons from left to right
C. decreasing number of electrons from left to right
D. decreasing atomic mass number from left to right - ** VERIFIED ANSWERS **✔✔increasing
atomic number from left to right
An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the
ice is heated?
A. The molecules will begin to move slower.
B. The molecules will begin to move faster.
C. The molecules will being to increase in density.
D. The molecules will begin to condense in the air. - ** VERIFIED ANSWERS **✔✔The molecules
will being to move faster.
Which best explains why the total mass of the product(s) would be less than the total weight of the
reactant(s) after a chemical reaction?
A. A physical change occurred.
B. Atoms involved in the reaction lost mass.
, C. Precipitates were created in the new solution.
D. Gases were released to the atmosphere. - ** VERIFIED ANSWERS **✔✔Gases were released to
the atmosphere.
Which would least likely have an impact on global climate changes?
A. producing energy using hydroelectric plants
B. producing energy using coal
C. producing energy using oil
D. producing energy using natural gas - ** VERIFIED ANSWERS **✔✔producing energy using
hydroelectric plants
Which is an example of a renewable energy resource?
A. biomass
B. Coal
C. gas
D. oil - ** VERIFIED ANSWERS **✔✔biomass
Which will most likely result if there is increased upwelling in a coastal area?
A. more aquatic life
B. less nutrients in water
C. higher water temperatures.
D. fewer nitrates - ** VERIFIED ANSWERS **✔✔more aquatic life
Upwelling is a process in which deep, cold water rises toward the surface. Surface waters are
displaced and replaced by cold, nutrient-rich water that "wells up" from below.
Which best determines the health of a lake used as a source of freshwater?
A. its depth and width
B. its temperature and pH
answers
Which is the best example of a pure substance?
A. peanuts
B. milk
C. gold
D. air - ** VERIFIED ANSWERS **✔✔gold
Which statement best explains how periods on the periodic table are organized?
A. increasing atomic number from left to right
B. increasing number of neutrons from left to right
C. decreasing number of electrons from left to right
D. decreasing atomic mass number from left to right - ** VERIFIED ANSWERS **✔✔increasing
atomic number from left to right
An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the
ice is heated?
A. The molecules will begin to move slower.
B. The molecules will begin to move faster.
C. The molecules will being to increase in density.
D. The molecules will begin to condense in the air. - ** VERIFIED ANSWERS **✔✔The molecules
will being to move faster.
Which best explains why the total mass of the product(s) would be less than the total weight of the
reactant(s) after a chemical reaction?
A. A physical change occurred.
B. Atoms involved in the reaction lost mass.
, C. Precipitates were created in the new solution.
D. Gases were released to the atmosphere. - ** VERIFIED ANSWERS **✔✔Gases were released to
the atmosphere.
Which would least likely have an impact on global climate changes?
A. producing energy using hydroelectric plants
B. producing energy using coal
C. producing energy using oil
D. producing energy using natural gas - ** VERIFIED ANSWERS **✔✔producing energy using
hydroelectric plants
Which is an example of a renewable energy resource?
A. biomass
B. Coal
C. gas
D. oil - ** VERIFIED ANSWERS **✔✔biomass
Which will most likely result if there is increased upwelling in a coastal area?
A. more aquatic life
B. less nutrients in water
C. higher water temperatures.
D. fewer nitrates - ** VERIFIED ANSWERS **✔✔more aquatic life
Upwelling is a process in which deep, cold water rises toward the surface. Surface waters are
displaced and replaced by cold, nutrient-rich water that "wells up" from below.
Which best determines the health of a lake used as a source of freshwater?
A. its depth and width
B. its temperature and pH
