Pure Substances and Mixtures

Which of these common substances is a homogeneous mixture?

• table salt
• pure water
• whole milk
• maple syrup

A magnet is hovering above a pile of particles of iron and sulphur. The magnet attracts the iron, separating it from the mixture.  Based on the information, which statement is true?

• The parts of a mixture keep their own properties.
• The elements in a compound keep their own properties.
• The properties of a mixture are different from the properties of its parts. 
• The properties of a compound are different from the properties of its elements. 

Tags

NGSS.MS-PS1-2

What type of substance is always made up of a single type of atom?

• mixture
• element
• molecule
• compound

Which of the following is a way in which elements and compounds are similar?

• Elements and compounds are both pure substances.
• Elements and compounds are both listed on the periodic table.
• Elements and 

Gina is preparing a poster to show examples of different types of mixtures. Which of the following sets of examples is correct?

• heterogenous colloid: gelatin dessert with fruit chunks; homogenous solution: salt water
• heterogeneous solution: salt water; homogeneous solution: brass
• heterogeneous colloid: fog; homogeneous suspension: oil-and-vinegar salad dressing
• homogeneous solution: colored water; homogeneous suspension: sandy water