Three examples of physical change are ________.

• boiling water, a nail rusting, a melting candle

• melting ice, mowing the lawn, carving a statue

• a pond freezing, breaking glass, a burning candle

• applying lipstick, making lemonade, baking bread

The number of protons and neutrons in the nucleus of one atom of the element.

• atomic mass

• atomic number

• neutron number

• valence electrons

a horizontal row (left to right) in the periodic table

• group

• period

• family

• orbital

The image shows a model of a substance. How is the substance classified?

• mixture

• element

• compound

• atom

Tags

NGSS.MS-PS1-1

A student reads three statements from a science book.

1. 1. The atoms or molecules in a solid state are closely packed and are fixed at their positions.

2. 2. The particles in a liquid state slide past one another and have spaces between them,

3. 3. The particles in a gaseous state move randomly in all directions and are the farthest apart.

The student uses the information to make a particle model representing the molecules of water in the three states: ice, water, and water vapor. Which model is correct?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

Examine the portion of the periodic table that contains neon, an unreactive gas in Group 18. Which element would have similar properties to neon, and why?

• Ar; elements in the same family of the periodic table share the same characteristics.

• Fl; elements in the same period of the periodic table share the same characteristics.

• Fr; elements on opposite corners of the periodic table share the same characteristics.

• Li; elements on opposite sides of the periodic table share the same characteristics.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

It describes how likely an element is to form bonds with another element

• elasticity

• combustibility

• flamibility

• reactivity

Tags

NGSS.HS-PS1-2

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

A student heats a beaker of water and constructs a graph based on the recorded observations.

What can be concluded from the portion of the graph where the temperature remains constant?

• The water in the beaker is boiling.

• The water in the beaker is melting.

• The water in the beaker is freezing.

• The water in the beaker is condensing.

Tags

NGSS.MS-PS1-4

A student examines a periodic table with two elements (X and Y) labeled. How can X and Y be classified?

• Both X and Y are metals.

• Both X and Y are metalloids.

• X is a nonmetal, and Y is a metal.

• X is a metal, and Y is a nonmetal.