Substances and Separation Make-up Quiz

Ben put 100 mL of water and 200 mL of oil in a beaker. Then he stirred the mixture. Which is the best way to separate the mixture back into oil and water?

• use a magnet to attract the oil

• pour the mixture through a sieve

• evaporate the water from the mixture

• let the oil float to the top, then decant it

Carla and Mike are using filter paper and a funnel to try to separate mixtures into their original parts.
       
Which mixture can be most easily separated using this method? 

• salt and sugar
• sand and salt
  
• water and sand
• water and sugar

Pam and Tarik are experimenting with a mixture of sugar and sand. They add water and stir thoroughly. How can they separate the sand from the mixture? 

• wait for the sand to float to the top of the water
• pour the mixture through filter paper in a funnel
• boil the mixture to evaporate the water
• use a magnet to separate the sand from the sugar

Martha has a big box with a mixture of paper clips. Some are metal and some are plastic. Which is the best property for Martha to use to separate the metal paper clips from the plastic paper clips? 

• mass
• shape
• magnetic attraction
• particle size

Four students made these different mixtures.

Cesar: sand and salt

Angelica: sand and rocks

Hank: salt and sugar

Laurie: salt and pepper

Whose mixture can most easily be separated by using the sieve shown above?

• Angelica's

• Cesar's

• Hank's

• Laurie's

When Darice and her dad finished building a dog house, the trash barrel was full of a mixture of sawdust, bent nails, wood shavings, and empty cardboard and plastic boxes.
       
Which property would be best for Darice to use to separate the bent nails from the mixture? 

• floatation
• magnetic attraction
• shape
• size

Four students used things they found at home to make different mixtures.
       
Which of the students’ mixtures can be separated into its original parts by using a magnet? 

• safety pins and sewing needles
• safety pins and metal paper clips
• wooden toothpicks and safety pins
• wooden toothpicks and plastic paper clips

Margit is looking for a way to separate the salt and other minerals from salt water. She tries pouring the mixture through some filter paper, but that does not work.

Which of these methods is best to separate the mixture?

• sieving

• flotation

• evaporation

• using a magnet

Students are experimenting with different ways to separate mixtures into their original parts. What method would work best to separate a mixture of white rice and table salt? 

• use a sifter and separate the parts by particle size
• pour the mixture into a bowl of water and use flotation
• pour the mixture onto black paper and separate the parts by color
• pour the mixture onto black paper and separate the parts by shape

Harriet and Sid mixed some sugar and water together. Which of the following is the best method of separating the sugar and water again?

• evaporation
• dissolving
• filtering
• flotation