Unit 3(End of Unit) Review

Which of these is true of all soutions?

• They all include water.

• They are all liquids or gases.

• The substances are permanently combined.

• The parts are evenly mixed.

Which method can be used to separate a solution, such as salt water?

• 
• 
• 
• 

John has to dissolve sugar crystals in water. What would be the best thing to do to help the crystals dissolve quickly?

• use the largest sugar crystals

• crush the sugar crystals

• heat the sugar crystals

• cool the water in the tank

Tags

NGSS.MS-PS1-4

Which will increase the rate at which salt dissolves the most?

• no stirring

• slow stirring

• medium stirring

• fast stirring

What term is used to identify a mixture that has the same composition throughout?

• solution

• liquid

• element

• compound

Which term or phrase best describes what happens when food rots?

• physical change

• conservation of mass

• chemical change

• formation of a compound

Tags

NGSS.MS-PS1-2

A cup hold 100 grams of liquid water and 150 grams of ice. What is a reasonable mass for ice in the cup after the water melts?

• 225 grams

• 250 grams

• 260 grams

• 150 grams

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which of these statements is true?

• When matter changes state, the space between particles in the matter stays the same.

• When matter changes state, its boiling point might also change.

• When matter changes state, its mass remains the same.

• When matter changes state, its mass changes.

Tags

NGSS.MS-PS1-4

When matter changes its shape, its mass will.....

• increase

• decrease

• stay the same

Tags

NGSS.MS-PS1-5

The pot contains a mixture.

The method shown in the picture can be used to separate what type of mixture?

• a solution, such as salt water

• a mixture of particles with different densities

• a mixture of particles of different sizes, such as seashells and sand

• a mixture of steel, which is magnetic, and aluminum, which is not magnetic