physical science state review

A solid dissolved in water can be separated from the water by _____.

• flotation
• evaporation
• sifting
• magnetic attraction

Which of the following can be separated using the equipment in the picture?

• a solution of sugar and water
• a mixture of oil and water
• a mixture of popcorn kernels and water
• a mixture of popcorn kernels and gravel

In a box, there is a mixture of iron filings and sand.  Which is the easiest way to separate the iron filings from the sand?

• sifting
• filtration
• evaporation
• magnetic attraction

A solution is made using 150 mL of water and 10 g of table salt.  Which of the following statements is true?

• The solvent is the table salt, and the solute is the water.
• The solute is the table salt, and the solvent is the water.
• Solvents are always liquids; therefore, water is the solvent.
• Solutes are always solids; therefore, salt is the solute.

When a solution evaporates from a container, _____ may remain at the bottom or sides.

• solvent
• chemical
• solute
• saturation

In a solution, the substance being dissolved is called the _____.

• solute
• solvent
• precipitate
• element

When one solution has more solute than another solution, it is said to be more _____.

• diluted
• concentrated
• dissolved
• non-saturated

In which temperature would sugar dissolve slowest?

• boiling water
• hot water
• room temperature water
• ice water

Tags

NGSS.MS-PS1-4

Which of the following would dissolve fastest?

• sugar cubes in cold water
• sugar crystals in cold water
• sugar cubes in hot water
• sugar crystals in hot water

Fifty grams of salt is added to 200 mL of water.  Which of the following methods would make the salt dissolve faster?

• Place the mixture in the refrigerator.
• Place the mixture in a dark place.
• Stir the mixture.
• Allow the mixture to sit undisturbed.