Mixtures and Solutions Review

Which is the best definition of a mixture? 

• Two same substances combined 

• Two or more substances you can separate 

• Two or more substances combined

What method could you use to separate a mixture of rocks and sand?

• Sink/float 

• magnetism

• sifting

A cook makes the following mixture for steak seasoning: 3 grams of salt, 2 grams of pepper, 1 gram of paprika, and 1 gram of garlic powder. How much steak seasoning has he made?

• 3 grams 

• 5 grams 

• 7 grams

Which statement is true about a mixture? 

• Substances are not chemically joined when combined and the atoms of the materials do not join together.

• Substances are not chemically joined when combined. 

• The atoms of the materials do not join together.

When two things join together chemically and atoms combine, what happens to the materials?

• Their properties change.

• Their properties stay the same.

• They join together.

Tags

NGSS.MS-PS1-2

Compare these mixtures. Which is a mixture you can separate entirely by hand?

• Ingredients in a cake 

• A mixture of coins

• Melted chocolate and marshmallows

 Why is cake not a mixture? 

• It consists of only one ingredient.

• All of the elements are the same.

• You cannot separate its ingredients.

Which mixture maintains the physical properties of its ingredients when mixed?

• Lemon juice and water

• Flour and paper clips

• Salt and water

Tags

NGSS.MS-PS1-2

The smallest particle of an element is-

• a molecule

• an atom 

• a mixture

Tags

NGSS.MS-PS1-1

Which of the following could help you separate a mixture of iron nails and sand?

• magnetism

• evaporation

• solubility

Tags

NGSS.MS-PS2-5