Classification of Matter Test

Abigail is doing a science experiment and finds a white solid labeled CaCO₃ in the lab. CaCO₃ is an example of which type of matter?

• Homogeneous mixture

• Compound

• Heterogeneous mixture

• Heterogeneous mixture

Tags

NGSS.MS-PS1-1

Grace is sorting materials in her science class. She finds samples of hydrogen, gold, and iron. These are all examples of

• homogeneous mixtures

• heterogeneous mixtures

• elements

Scarlett mixes hydrogen and oxygen in a lab, and they chemically join to form a new type of matter. What is this type of matter called?

• compound

• colloid

• suspension

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

While helping Lily organize the kitchen, you notice that milk, paint, and mayonnaise all have a similar appearance. These are all examples of

• Compounds

• Heterogeneous mixtures

• Elements

Samuel is making a salad dressing by mixing oil and vinegar, and he also observes the process of rust forming on iron. He notices that both involve more than one substance, but in one case, the substances are just mixed, while in the other, they are chemically combined. Which of the following best describes this?

• Both are made of more than one substance, but only compounds have chemically combined components.

• Both are made of only one substance, but mixtures are chemically combined.

• Compounds and homogeneous mixtures are both elements.

• Homogeneous mixtures have chemically combined components, but compounds do not.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

A student is given two bottles, labeled A and B, that contain two different white solids. He adds 2 grams of substance A to test tube A and 2 grams of substance B to test tube B. He then adds 8 mL of a clear, colorless liquid to each tube and shakes both tubes until no white solid can be seen in either of them. He then adds 2 more grams of substance A to test tube A and 2 more grams of substance B to test tube B. After shaking both tubes for a while, he let them stand for a day. He then obtained the results shown in the picture below. Based on the results, which of the following statements is correct?

• In the clear, colorless liquid, solid A is more soluble than solid B.

• In the clear, colorless liquid, solid B is more soluble than solid A.

• In the clear, colorless liquid, solids A and B are both insoluble.

• Only 4 grams of solid B will dissolve in 8 mL of the liquid.

Tags

NGSS.MS-PS1-2

 Kamal stirred two spoonfuls of red clay into a cup of water. Initially, the clay appeared to be evenly mixed throughout the water. The image below shows how the cup appeared several minutes after Kamal stopped stirring.

Based on the diagram, which term most accurately describes the clay and water?

• Solution

• Colloid

• Suspension

• Emulsion

Benjamin is baking a cake and mixes baking soda (NaHCO₃) and vinegar (CH₃COOH). He notices a new substance forms as a result of a chemical reaction. What is a compound?

• A substance made from two or more elements that are chemically bonded

• A physical combination of two or more substances

• A homogeneous mixture of two or more substances

• A substance with a fixed composition

Tags

NGSS.MS-PS1-1

Anika mixes sand and salt together in a bowl. What best describes the result?

• A substance made from two or more elements that are chemically bonded

• A physical combination of two or more substances

• A homogeneous mixture of two or more substances

• A substance with a fixed composition

Priya mixes some salt into a glass of water and stirs until the salt disappears. What is this mixture called?

• A substance made from two or more elements that are chemically bonded

• A physical combination of two or more substances

• A homogeneous mixture of two or more substances

• A substance with a fixed composition