Lab mixtures

The mixture in step 2 (flour, sugar, baking powder, and salt) is a ____ mixture.

• Homogeneous
• Heterogeneous

The mixture in step 3 (flour, baking powder, salt, and butter) is a ____ mixture. (you should still see pieces of butter)

• Homogeneous
• Heterogeneous

The mixture in step 4 (flour, baking powder, salt, butter, and milk) is a ____ mixture. (you should still see pieces of butter)

• Homogeneous
• Heterogeneous

After you add the milk, is this a physical or chemical change?

• Physical
• Chemical

Avery and Aria are mixing ingredients in a chemistry lab. They combine two or more elements chemically, resulting in a substance whose properties are completely different from those of the individual elements. This substance is known as ____.

• Compound

• Heterogeneous

• Homogeneous

• Solution

Pure substances ____.

• Are made of up of only one material
• Have definite and constant properties under certain conditions
• Are elements or compounds
• All of these are correct
• None of the above

An example of heterogeneous mixture is ____.

• Cola (flat)
• Tea
• Sodium Chloride
• Tossed Salad

Which of the following involves a chemical change?

• Combining baking soda and vinegar
• Combining salt and water
• Sweetening iced tea
• Tossing salad

What is an example of a reversible physical change?

• Change in color
• Chopping
• State change
• Rusting

An example of an element in modern chemisty is___.

• Air
• Iron
• Water
• Fire