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Why are fluorine (F), chlorine (Cl), and iodine (I) in the same group of the periodic table?
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
Skeletal structures are common between 2 animals of different species. These structures probably exist because both species...
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
Which method of obtaining energy has the most negative impact on the hydrosphere?
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
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?
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
In a chemical reaction, the mass of the products always __ the mass of the reactants.
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
Which is most helpful in determining the relative ages of rock layers?
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
Evidence shows that early horse species were much smaller than the modernday horse. Which best explains the evolutionary changes in the horse?
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
The law of conservation of mass means that
They have similar reactions with other elements.
index fossils
building dams
atoms are not lost or destroyed in a chemical reaction.
equals
share a common ancestor
Copper (Cu)
Larger horses were better able to find and collect food.
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