Physical Science Final Exam Review

How do electrons move in a metallic bond?

• freely around all of the atoms

• around only the heaviest atoms

• around only atoms with small diameters

• tightly around the atom with the most bonds

Which type of chemical bond is formed by the electrostatic force between a positive ion and a negative ion?

• cooperative

• covalent

• ionic

• metallic

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NGSS.HS-PS1-3

NGSS.HS-PS2-4

The reactivity of an element can often be determined by examining the element's

• valence electrons.

• atomic mass.

• solubility.

• isotopes.

Which of the following statements about electromagnetic and mechanical waves is true?

• Electromagnetic waves must travel through a medium, but mechanical waves do not require a medium.

• Electromagnetic waves travel mostly through matter, and mechanical waves travel mostly through a vacuum.

• Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium.

• Mechanical waves sometimes travel through a vacuum, and electromagnetic waves sometimes travel through matter.

What is the compound that would result from mixing lithium with the polyatomic known as hydroxide (OH)?

• LiOH

• Li₃(OH)₂

• OHLi

• LiH

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NGSS.MS-PS1-1

Iron and oxygen react to form iron(III) oxide which is also called rust. What is the chemical formula for iron(III) oxide?

• Fe₂O

• Fe₂O₃

• Fe₃O₂

• FeO₃

Tags

NGSS.MS-PS1-1

Sam wants to grow blueberries. He researched and found that these plants like a soil pH of between 4.0 and 6.0. According to his research, what is the pH of the most acidic soil that blueberries can stand?

• 4.0

• 4.5

• 5.5

• 6.0

A student checked the pH of various food ingredients and marked them on a pH chart, as shown. Which statement is true?

• Milk is more acidic than lemon juice and apple juice.

• Baking soda is more acidic than milk and maple syrup.

• Apple juice is more acidic than lemon juice but less acidic than milk.

• Maple syrup is more acidic than milk but less acidic than apple juice.

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NGSS.MS-PS1-2

Mica is investigating the speed of waves. She hypothesizes that waves travel at different speeds depending on the media. She sets up an experiment where she

sends two different waves through air, water, and glass. She keeps the temperature of each medium constant and measures the speed of the waves as they travel through each medium. The data table shows her results. Mica draws and labels the waves she is studying. Which pair of diagrams is the most similar to what Mica drew?

• 
• 
• 
• 

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

A student is investigating how vinegar and baking soda interact. He pours 50 mL of vinegar into a beaker and adds a liquid pH indicator. Next, he adds baking soda and many bubbles form. Which BEST explains why the color changes in the investigation?

• Vinegar is a base and baking soda is an acid. When baking soda is added to vinegar, the hydrogen ions in the baking soda make the solution acidic.

• Vinegar is an acid and baking soda is a base. When baking soda is added to vinegar, the hydrogen ions in the baking soda make the solution acidic.

• Vinegar is an acid and baking soda is a base. When baking soda is added to vinegar, the hydrogen ions bond with hydroxide ions and the solution neutralizes.

• Vinegar is a base and baking soda is an acid. When baking soda is added to vinegar, the hydrogen ions bond with hydroxide ions and the solution neutralizes.

Tags

NGSS.MS-PS1-2