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A plastic ruler feels warmer than a metal ruler because:
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
What happened when we combined the vinegar and baking soda in the baggie?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
Which of the following is an example of a chemical change?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
Hydrogen and oxygen react to form water. At an atomic level, how do we know that a chemical reaction has occurred?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
In a chemical reaction, which of the following statements are true?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
A student mixed two substances together and concluded that a chemical reaction had taken place. What process would the student observe to conclude that a chemical reaction had occured?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
What happens to the properties of sodium and chlorine when they react to form sodium chloride (naCl) common table sallt?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
A hot object and a cool object. Which of the following statements about the relationship between temperature and thermal energy in this case is correct?
A substance bubbles and produces an odor.
The properties of both sodium and chlorine change.
The arrangement of the atoms in the reactant is different than in the product.
The hydrogen and oxygen atoms regroup into a new molecule.
The substance chemically reacted and released energy.
Energy flows from the object with the highest temperature to the object with the lowest temperature.
color change
The metal ruler conducts thermal energy away from your hand faster.
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