U2.2 Science: Dissolving

Body wash, handsoap, and shampoo all dissolve in water

• True

• False

Tags

NGSS.MS-PS1-2

Which of these dissolves in water? Select all that apply:

• Sand

• Vegetable Oil

• Sugar

• Salt

• Soap

As a particle dissolves in water, its size tends to

• increase

• decrease

• stay the same

• cannot be determined

Check all that apply.

Dissolving can be increased by:

• reducing the amount of liquid

• increasing the amount of liquid

• stirring

• an increase in temperature

• a decrease in temperature

What would be the fastest to dissolve?

• 50ml sugar in hot tea

• 50ml sugar in iced tea

• 100ml sugar in hot tea

• 100ml sugar in iced tea

Tags

NGSS.MS-PS1-4

What would most likely dissolve the slowest?

• 50ml chocolate syrup in cold milk

• 50ml chocolate syrup in hot milk

• 100ml chocolate syrup in cold milk

• 100ml chocolate syrup in hot milk

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The Food Network had a competition as to who had the fastest stirring arm. They all had equal amounts of cocoa powder and equal amounts of milk. Who was the fastest?

• Bobby Flay: 6.74 seconds

• Giada de Laurentis: 6.4 seconds

• Rachel Ray: 7.9 seconds

• Guy Fieri: 17.52 seconds

MidKarlito wants to test the rate of dissolving on salt with different surface areas. He selects salts of different sizes: coarse Himalayan pink salt, kosher salt, and iodized table salt. Select all answer choices that would follow the proper experimental design for controls.

• A control group is needed with hot water with no salt added

• The same amount of each different salt needs to be added for each variable group

• The same amount of water is added at different temperatures.

• Different amount of water at the same temperature needs to be added.

• The same amount of water is added at the same temperature

The same amount of melting chocolate is added to the same amount of milk in the following manners and then timed:

Group 1: mechanical energy and no heat

Group 2: No mechanical energy and no heat

Group 3: mechanical energy and heat

Group 4: No mechanical energy and heat

The times written for the AVERAGE of three trials are listed below. Which selection correctly pulls the times you would estimate for each group?

• Group 1: 10.2 sec

  G2: 12.7

  G3: 14.1

  G4: 18.7

• Group 1: 18.7 sec

  G2: 14.1

  G3: 12.7

  G4: 10.2

• Group 1: 14.1 sec

  G2: 10.2

  G3: 18.7

  G4: 12.7

• Group 1: 14.1 s

  G2: 18.7

  G3: 10.2

  G4: 12.7

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4