PBA #1 Test Review

What happens to gas in a balloon, when there is more energy in a room? (Hint: When the room is warmer.)

• The gas particles will spread apart and move faster.

• The gas particles will come closer together and slow down.

• The speed and spacing of the gas particles will not change.

Tags

NGSS.MS-PS1-4

What happens to the gas in a balloon, when you put a balloon in the freezer?

• The gas particles will spread apart and move faster.

• The gas particles will come closer together and slow down.

• The speed and spacing of the gas particles will not change.

Tags

NGSS.MS-PS1-4

What happened to the molecules of the ice cream in my hand when it started to melt?

• The solid particles will spread apart and move faster.

• The solid particles will come closer together and slow down.

• The speed and spacing of the solid particles will not change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the subscript for K?

3KCl₂

• 3

• 2

• 1

• 6

How many elements are in the formula?

3KCl₂

• 3

• 2

• 1

• 6

What is the coefficient for K?

3KCl₂

• 3

• 2

• 1

• 6

How many total atoms of K are there?

3KCl₂

• 3

• 2

• 1

• 6

What is the subscript for Cl?

3KCl₂

• 3

• 2

• 1

• 6

What is the coefficient for Cl?

3KCl₂

• 3

• 2

• 1

• 6

How many molecules are there?

3KCl₂

• 3

• 2

• 1

• 6