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Several samples of elements are placed on a lab table for students to observe. In his laboratory report, Jonathan records, “Sample 1 is a shiny wire.” Which element is most likely sample 1?
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
Why are fluorine (F), chlorine (Cl), and iodine (I) in the same group of the periodic table?
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
Which is most helpful in determining the relative ages of rock layers?
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
A(n) __ is a substance that reacts with another substance in a chemical reaction.
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
The law of conservation of mass means that
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
Evidence shows that early horse species were much smaller than the modernday horse. Which best explains the evolutionary changes in the horse?
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
Which statement is true?
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
A(n) __ is a substance that is produced during a chemical reaction.
atoms are not lost or destroyed in a chemical reaction.
They have similar reactions with other elements.
Evidence drawn from comparative anatomy helps form the basis for biological classification systems and the theory of evolutio
product
Copper (Cu)
Larger horses were better able to find and collect food.
index fossils
reactant
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