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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?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
Which would least likely have an impact on global climate changes?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
Which statement best explains how periods on the periodic table are organized?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
What could help a scientists determine the approximate age of newly discovered dinosaur bones?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
What happens to the molecules of an ice cube that is placed in a heated pan?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
Which will most likely result if there is increased upwelling in a coastal area?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
Which best describes how ice cores are important to the study of geologic history?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
Which is the best example of a pure substance?
more aquatic life
producing energy using hydroelectric plants
gases were released into the atmosphere
They contain evidence showing changes in the atmospheric composition over time
the index fossils living in the area of the bones
gold
increasing atomic number from left to right
The molecules will begin to move faster
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