PS1.1 CFA

Which diagram represents a mixture?

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The atomic arrangements of two substances (A and B) are shown in the diagram. Which statement describes one of the substances correctly?

• Substance A is an element as atoms are not combined chemically.

• Substance A is a compound as two different types of atoms are present.

• Substance B is a mixture as the atoms can be separated by any physical process.

• Substance B is a compound as the atoms can be separated only by chemical processes.

Tags

NGSS.MS-PS1-1

The diagram represents the atomic arrangement of a substance. Which answer option best describes the substance?

• 1. It is made up of a single element. 2. The atoms can be separated by chemical processes.

• 1. It is made up of a single element. 2. The atoms can be separated by physical processes.

• 1. It is made up of two different elements. 2. The atoms can be separated by chemical processes.

• 1. It is made up of two different elements. 2. The atoms can be separated by physical processes.

Tags

NGSS.MS-PS1-1

The chart shows a list of formulas. Which statement is true about the substances in the list?

• They all contain hydrogen and oxygen.

• They all contain carbon and hydrogen.

• They all contain carbon.

• They all contain oxygen.

Tags

NGSS.MS-PS1-1

A teacher drew three figures on the board. Which option correctly classifies each figure as a compound, element, or mixture?

• Figure 1: element; Figure 2: compound; Figure 3: mixture

• Figure 1: element; Figure 2: mixture; Figure 3: compound

• Figure 1: compound; Figure 2: element; Figure 3: mixture

• Figure 1: compound; Figure 2: mixture; Figure 3: element

Tags

NGSS.MS-PS1-1

Which particle diagram can be classified as a mixture?

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The diagram shows the atomic arrangement of two substances formed by hydrogen (H) and oxygen (O) atoms. Which option correctly identifies the substances?

• substance 1: mixture; substance 2: mixture

• substance 1: compound; substance 2: mixture

• substance 1: mixture; substance 2: compound

• substance 1: compound; substance 2: compound

Tags

NGSS.MS-PS1-1

A teacher asks her students to classify the substances listed in the table shown as elements, compounds, or mixtures. A student claims that all of the substances are compounds. Which statement correctly describes the student’s claim?

• The student’s claim is correct because a substance that contains more than two of the same atom is a compound.

• The student’s claim is incorrect because a substance that contains more than one element is always a mixture.

• The student’s claim is incorrect because the atoms in the substances are physically combined to form a mixture.

• The student’s claim is correct because the atoms in the substances are chemically combined to form a compound.

Tags

NGSS.MS-PS1-1

Examine the images of an iron nail, a flower, a glass of water, and a shipping crate. What do these objects have in common?

• They are all made of cells.

• They are all made of atoms.

• They are all pure substances.

• They are all in the same state of matter.

Tags

NGSS.MS-PS1-1

A student makes a model to show how particles in water and ice are arranged. The student uses marbles to represent the smallest particles that make up water and ice. What does each marble represent in the model?

• atom

• compound

• element

• molecule

Tags

NGSS.MS-PS1-1