Unit 1 - Nature of Matter

Science is much different than philosophy because ___.

• • philosophy forms conclusions, but science does not

• • science starts with a conclusion, then forms arguments to support it

• • only science attempts to understand how nature works

• • science uses experiments to test ideas, philosophy does not

The philosopher ___ believed that matter was made of the four classical elements (fire, earth, water, and air) while ___ believed that matter was made of tiny particles.

• Democritus | Aristotle

• Aristotle | Democritus

• Brown | Priestly

• Priestly | Brown

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. His experimental results are shown to the left.

The statement "Robert Boyle did not believe that water was one of the basic elements" is an example of a __.

• conclusion

• independent variable

• hypothesis

• constant

Tags

NGSS.HS-PS2-5

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. His experimental results are shown to the left.

What was the DEPENDENT VARIABLE in this experiment?

• the electricity

• the water

• the test tubes

• the gas produced in each test tube

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. These are his experimental results:

What was Boyle's SAMPLE SIZE?

• 6

• 3

• 1

• 2

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. These are his experimental results:

Boyle decided to add up each of the volumes of gas produced in test tube 1 for all the trials. Following the rules of addition, what is the total volume?

• 19.0mL

• 19mL

• 19.2mL

• 19.21mL

Tags

NGSS.HS-PS1-7

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. These are his experimental results:

How many significant figures are in the three measurements taken in test tube #2?

• 1

• 2

• 3

• 4

Robert Boyle did not believe that water was one of the basic elements that all substance was made of. To test this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected that gas that came out. He repeated the experiment a total of three times, each time using the same amount of water and the same level of electric current. These are his experimental results:

We now know the two gases released in this experiment are hydrogen and oxygen. Water has a formula of H₂O, and the decomposition of water is written like this: 2H₂O → 2H₂ + O₂. Given this, which test tube contains which gas?

• Both test tube contain a mix of both gases

• Test tube #1 - Oxygen; Test tube #2 - Hydrogen

• Test tube #1 - Hydrogen;

  Test tube #2 - Oxygen

• There is no way to tell by looking at the volumes in each test tube

Tags

NGSS.HS-PS1-2

The separation of water into hydrogen and oxygen gas is an example of a __.

• physical property

• physical change

• chemical property

• chemical change

Tags

NGSS.HS-PS1-2

Hydrogen and oxygen gas are only composed of one type of particle, so they are classified as __.

• ions

• elements

• phlogiston

• compounds

Tags

NGSS.MS-PS1-1