chem final

The big bang theory is an example of a scientific theory. This means that it is: 

• An educated guess on the origin of the universe 

• Speculation on the origin of the universe 

• A mathematical model or equation that predicts how things behave in the universe

• The best available explanation for the origin of the universe, based on experiments, 

  observations, and mathematical models

Tags

NGSS.HS-ESS1-2

You decide to burn a couch over the weekend in celebration of the local sports team, and reduce an old couch to ashes. Which of the following statements is true? 

• The total amount of matter in the universe decreased after you burned the couch 

• The total amount of matter in the universe increased after you burned the couch 

• The total amount of matter in the universe is the same before and after you burn the couch

• You are unable to make a prediction about the total amount of matter in the universe 

  without weighing the ashes of the burned couch 

Tags

NGSS.HS-PS1-7

When you roll a ball down a hill, the ball gains kinetic energy. Which of the following statements is true? 

• The total amount of energy in the universe decreased after you rolled the ball down the hill

• The total amount of energy in the universe increased after you rolled the ball down the hill

• The total amount of energy in the universe stays the same after you rolled the ball down the hill 

• You are unable to make a prediction about the total amount of energy in the universe 

  without measuring the speed of the ball before and after rolling down the hill 

Tags

NGSS.HS-PS3-2

Coulomb's law states that two electrically charged objects will feel an attractive or repulsive force between them proportional to the amount charge they have and the distance between them. Why is this considered a scientific law and not a theory?

• This equation describes what will happen in a particular situation, but doesn't explain how 

  or why it occurs 

• This equation explains why or how a phenomena occurs, but doesn't describe what will 

  happen in a particular situation 

• This equation has not yet been tested enough to make it a scientific theory

• This relationship is just a guess

Tags

NGSS.HS-PS2-4

Two similarly charged objects are placed next to each other so that they are touching. 

What will they tend to do?

• repel

• attract

• no change

Tags

NGSS.HS-PS2-4

Two opposite are placed next to each other so that they are touching. What will they tend to do?

• repel

• attract

• no change

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

As the distance between two charges increases, the force between them will 

• increase

• decrease

• stay the same

Tags

NGSS.HS-PS2-4

Two negatively charged objects approach each other. As the objects approach each other, the kinetic energy of the objects: 

• increase

• decrease

• stay the same

Tags

NGSS.MS-PS2-3

NGSS.MS-PS3-1

NGSS.MS-PS3-5

As the objects approach each other, the potential energy of the objects:

• increases

• decreases

• stays the same

Tags

NGSS.HS-PS2-4

As the objects approach each other, the total energy of the objects:

• increases

• decreases

• stays the same

Tags

NGSS.HS-PS3-5