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The manufacturer of a particular brand of toothpaste claims that the brand contains "no chemicals." what does the company mean? (2)

- The company is using consumer fear of chemicals to imply that their product is safe - The "no chemicals" could refer to additives, preservatives, pesticides, or insecticides, which are all groups of chemicals that many consumers do not want present in their products.

"Which of the following would be considered a theory? 1) Helium balloons float because helium is less dense than air. 2) Hot air rises. 3) Gasoline has a very strong odor. 4) Glass is fragile.

1)

"Which statement would NOT be an example of ""quantification""? 1) The water in the swimming pool feels colder than it was yesterday. 2) The average high temperature this July was two degrees higher than last year's average high temperature. 3) The price of milk went up ten cents per gallon. 4)The newest model of that car gets five more miles per gallon than last year's model.

1)

Sort each of the words into the three categories: contains chemicals, chemical reaction, or neither. vitamin E, neutralization, protein, sunlight, marble, rainbow, combustion, photosynthesis, rusting, oranges, heat

1) Contains chemicals: oranges, marble, vitamin E, protein 2) chemical reaction: neutralization, combustion, photosynthesis, rusting 3) neither: heat, sunlight, rainbow

"Which of the following is an example of a scientific law? 1) All matter is composed of small, indestructible particles called atoms. 2) In a chemical reaction, matter is neither created nor destroyed. 3) Flammable objects contain phlogiston. 4) When a can of soda pop is opened, a fizzing sound is heard. 5) none of the above

2)

"What term best describes a brief statement that summarizes many past observations and predicts new ones? 1)experiment 2)theory 3)hypothesis 4)scientific law 5)none of the above

4)

"Which of the following is an example of an observation? 1) All matter is composed of small, indestructible particles called atoms. 2) In a chemical reaction, matter is neither created nor destroyed. 3) Flammable objects contain phlogiston. 4) When a can of soda pop is opened, a fizzing sound is heard. 5) none of the above

4)

"Which of the following is considered a hypothesis (as opposed to an observation)? 1) Fresh lava from a volcano is hot. 2) Spiders have eight legs. 3) The Washington Monument is 555 feet tall. 4) Birds can fly because they have hollow bones. 5) none of the above

4)

"Which of the statements below is NOT part of the scientific method? 1)refinement of a hypothesis as needed 2)testing of a hypothesis by experimentation 3)formation of a hypothesis 4)observation and measurement 5)All of the above steps are part of the scientific method.

5)

Where can you find chemicals?

In a chemical stockroom, In a builder's supply store,All around you and even inside of you

Which scientist is credited with the theory of the atom?

John Dalton

This statement is ____________________ Water expands when it freezes

an example of matter and molecules.

An example of the scientific method being used from this chapter is the discovery of what happens ____________, which required proving phlogiston theory as __________.

combustion reactions, incorrect

The following statements are true about water, but which one can be said about any substance? Water is a substance that ______.

is a chemical

The first step in acquiring scientific knowledge is often ______.

making observation

Rank the following phrases, which describe the scientific method, from starting point to finishing point.

making observations, planning experiments,performing experiments,using logic to come to a conclusion

"The key to success in chemistry is:

mathematical skills, practice, curiosity, commitment

The scientific method emphasizes _________________ as the way to understand the world.

observation and experimentation

Because matter is made up of molecules, the behavior of matter is dictated by _____________. If the molecules were _______, the matter would be different.

the behavior of its constituent molecules, different

"Chemisty is the science that studies ______________________.

the connections between the properties of matter and the particles that compose that matter.