BM 2 - Cumulative REVIEW CTG 1&3

Students perform four experiments in which they combine different substances into a beaker. Their observations are shown in the table below. Which experiment most likely represents a chemical reaction?

• Experiment 1

• Experiment 2

• Experiment 3

• Experiment 4

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Students perform four investigations. Their observations are shown in the table below. In which investigation was a physical change observed?

• Investigation 1

• Investigation 2

• Investigation 3

• Investigation 4

Tags

NGSS.MS-PS1-2

Ammonium carbonate is a colorless crystalline solid represented by the chemical formula (NH₄)₂CO₃. How many atoms of each element are represented in this chemical formula?

• 4 nitrogen atoms, 4 hydrogen atoms, 3 carbon atoms, and 2 oxygen atoms

• 2 nitrogen atoms, 4 hydrogen atoms, 3 carbon atoms, and 3 oxygen atoms

• 2 nitrogen atoms, 8 hydrogen atoms, 2 carbon atoms, and 3 oxygen atoms

• 2 nitrogen atoms, 8 hydrogen atoms, 1 carbon atom, and 3 oxygen atoms

Tags

NGSS.MS-PS1-1

Copper is commonly used to make cookware, like pots and pans, because it has a superior ability to conduct heat. A model of the periodic table is shown. Which other elements are most likely to conduct heat? Select THREE correct answers.

• I

• III

• II

• IV

• V

Tags

NGSS.MS-PS3-3

Which chemical equation does NOT represent the law of conservation of mass?

• C₂H₆ + O₂ → CO₂ + H₂O

• HCl + NH₃ → NH₄Cl

• Ca + Cl₂ → CaCl₂

• 2Fe + 3Cl₂ → 2FeCl₃

Tags

NGSS.MS-PS1-5

A chemical equation for the reaction between hydrochloric acid, HCl, and sodium hydroxide, NaOH is shown. The masses of some of the reactants and products are given in grams.

• 34.46 g

• 40.43 g

• 60.01 g

• 23.98 g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which statement supports the answer to Part A?

• In a chemical reaction, the mass of the reactants is greater than the mass of the products.

• In a chemical reaction, the mass of the reactants is less than the mass of the products.

• In a chemical reaction, the mass of the reactants is equal to the mass of the products.

• In a chemical reaction, the mass of the products decreases and then increases.

Tags

NGSS.MS-PS1-5

Students in a science class create models of four substances. The characteristics of each substance are listed in the table below. Which substances are accurately represented in the table?

• 2H₂O and C

• C and H₂

• 2H₂O and H₂

• 2H₂O and NH₃

Tags

NGSS.MS-PS1-1

In 1991, Mount Pinatubo erupted, which led to an approximate half-degree drop in Earth’s global surface temperature for two years. Which statement best describes the reason for the decrease in Earth’s surface temperature?

• The gases and particles from the volcanic eruption temporarily blocked sunlight.

• The volcanic eruption caused ice sheets to expand and reflect more sunlight.

• The gases and particles from the volcanic eruption absorbed a large amount of heat.

• The volcanic eruption resulted in the formation of clouds that reflected heat back into space.

Tags

NGSS.MS-ESS2-5

Which student correctly described the influence of human activities on Earth's climate?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.MS-ESS3-4