Do Now/Test Review 9-19

The science teacher accidentally combined metal shavings with sand, what method can be used to separate the mixture?

• 
• 
• 
• 

True or False: You can use your hands or tweezers to separate salt from water.

• True

• False

When we combined the gravel and water together, it formed a _________.

• mixture
• solution

James wants to seperate the salt from the water in his glass of salt water. What seperation method should James use?

• Magnets

• Evaporation

• Filter

• Using his hands

A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating? (5.5A)

• Solubility

• Relative density

• Conductivity

• Mass

Which of these is the best conductor of electricity? (5.5A)

• Glass rod

• Cotton string

• Plastic tubing

• Copper penny

A student reads the label on the bottle of salad dressing shown here. Why would the student shake the salad dressing well before using it? (5.5A)

• Vinegar and oil have different densities.

• Vinegar and oil easily form a solution.

• Vinegar and oil both contain water.

• Vinegar and oil are both liquids.

The table lists some properties of four different samples of matter. Which two samples could be glass and saltwater? (5.5A)

• Samples 1 and 2

• Samples 3 and 4

• Samples 1 and 3

• Samples 2 and 3

Which of these is not soluble in water?

• Oil

• Salt

• Honey

• Sugar

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

• 500 grams, because the cheese does not gain or lose mass just because it was melted
• 499 grams, because some of the cheese evaporates as it melts
• 502 grams, because the cheese absorbs heat as it melts