Physical Science EOY Quiz

Choose all of the possible INCORRECT lab safety procedures for the picture below. Select three answers.

• missing safety goggles

• fumes into the face of a scientist

• horseplaying in the lab

• work area filled with flammable material

• no teacher in the lab

Solid iron melts at a temperature of 1,538 °C. Which statement correctly describes the changes that occur at the atomic level when a sample of iron reaches this temperature?

• A: The iron atoms start losing electrons

• B: Covalent chemical bonds between iron atoms break, releasing heat

• C: The iron atoms break apart and the atoms start moving much more rapidly

• D: The iron atoms get closer together

Tags

NGSS.MS-PS1-4

Which change in state represents an endothermic reaction?

• A: freezing

• B: vaporizing

• C: deposition

• D: condensing

Tags

NGSS.MS-PS1-4

Most matter ______ when heated.

• contracts

• condenses

• expands

• solidifies

Tags

NGSS.MS-PS1-4

Which of the following statements are true? Select the three correct answers.

• A fluorine atom has 18.998 electrons.

• A chlorine atom has 17 protons and 17 electrons.

• A chlorine atom has an atomic mass of 35.453 amu.

• A fluorine atom has an atomic mass of 9 amu.

• A bromine atom has 45 electrons

Tags

NGSS.MS-PS1-1

The diagram is an outline of the periodic table with four elements labeled. Which element is a nonmetal?

• 1

• 2

• 3

• 4

Aspartame is an artificial sweetener, its formula is C14H18N2O5. Which element in the formula has the fewest number of atoms?

• hydrogen

• carbon

• nitrogen

• oxygen

Tags

NGSS.MS-PS1-1

Identify the properties of covalent and ionic bonds.

Which of the four substances on this pH scale is a weak base?

• A) Calcium hydroxide

• B) Human blood

• C) Whole milk

• D) Lemon juice

Pick the right options in the dropdown below. Hydroxide ions are associated with bases just as ______ ions are associated with acids.

• hydroxide

• hydronium