Mystery of Mixtures

Multiple Choice

Which of the following best explains why food coloring splits into different colors when added to a liquid?

• The food coloring contains different pigments that do not dissolve equally in the liquid.

• The temperature of the liquid causes the colors to separate.

• The shape of the container affects how the colors mix.

• The food coloring is heavier than the liquid.

Open Ended

Why do you think some foods, like salad dressings, separate into layers while others stay mixed?

Multiple Choice

Which of the following best describes a solution?

• A mixture where substances are chemically joined

• A mixture where one substance dissolves completely in another

• A solid material that sinks in a liquid

• A colored substance used to change the color of materials

Open Ended

How does the process of separating food coloring using paper chromatography reveal the hidden colors inside the mix?

Multiple Choice

Which of the following helps oil and vinegar stay blended in some salad dressings?

• Salt

• Sugar

• Emulsifiers like mustard

• Water

Open Ended

Explain how salad dressings can be smooth or chunky, and why some ingredients stay mixed while others separate.

Fill in the Blanks

Oil and water don't mix because water molecules stick together due to their differences. This concept is known as

Multiple Select

Which of the following are examples of mixtures that can separate over time?

• Juice with pulp

• Paint shaker

• Lava lamp

• Medicine

Open Ended

Explain how the behavior of oil and water in a mixture demonstrates the concept of mixtures and separation.

Multiple Choice

Which statement best explains why food coloring can be separated into different dyes using chromatography?

• Food coloring is a pure substance.

• Food coloring contains multiple dyes that travel at different rates.

• Food coloring is made only of water and sugar.

• Food coloring cannot be separated.

Fill in the Blanks

By the end of this lesson, you should be able to

why food coloring splits into different colors.

Open Ended

Reflecting on today's lesson, why do you think some foods, like salad dressings, separate into layers while others stay mixed?