Category 1 STAAR

Which two atoms are of elements in the same group in the periodic table?

• Atom 1 and Atom 2

• Atom 1 and Atom 4

• Atom 2 and Atom 3

• Atom 3 and Atom 4

Tags

NGSS.MS-PS1-1

The model of the periodic table below shows the locations of four elements.

A student is asked to identify an element that is a pale-yellow brittle solid and does not conduct electricity. At which location in this periodic table would the element most likely be found?

• 1

• 2

• 3

• 4

Some students conducted a laboratory investigation to learn more about the physical properties of different elements. They observed four samples and recorded their observations in the table below.

Based on these observations, which sample is most likely a nonmetal?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

The table lists some compounds found in foods and their formulas. Based on this information, which of these statements is NOT true?

• A molecule of sorbitol contains three more oxygen atoms than a molecule of glutamine does.

• A molecules of lactose contains twice as many atoms as a molecule of fructose does.

• A molecule of fructose contains four more atoms than a molecule of glutamine does.

• A molecules of lactose contains twice as many carbon atoms as a molecule of sorbitol does.

Tags

NGSS.MS-PS1-1

Which substances have the same number of carbon atoms?

• Substances 1 and 2

• Substances 2, 3, and 4

• Substances 2 and 3 only

• Substances 1 and 3

Tags

NGSS.MS-PS1-1

The equation below represents a chemical reaction that occurs in living cells. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy How many atoms are represented in the reactants of this equation?

• 6

• 12

• 24

• 36

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A chemical reaction in which calcium carbonate, CaCO₃, is decomposed results in the production of two simpler compounds.

What mass of calcium carbonate, to the nearest hundredth of a gram, is decomposed in this reaction?

• 49.97

• 28.00

• 21.97

• 6.03

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes.

• Oxygen is present.

• A new substance is produced.

• Coal is made up of more than one element.

Tags

NGSS.MS-PS1-2

For an investigation a student poured a blue solution of CuSO₄ into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes. The student inferred that a chemical reaction occurred. What evidence supports this inference?

• A dark solid formed on the zinc metal.

• The zinc metal remained silver-colored and shiny.

• The CuSO₄ solution turned blue when the zinc metal was added.

• None of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A manufacturer selected a metal to use in producing a lightweight button for clothing. A metal that has a density of 2.71 g/cm³ was selected.

Which of the metals was selected?

• Metal 1

• Metal 2

• Metal 3

• Metal 4

Tags

NGSS.MS-PS1-2