PBOM Test Review

What is the formula to convert Kelvin to Celsius?

• °C = K - 273

• °C = K + 273

• °C = K × 273

• °C = K ÷ 273

The average kinetic energy of particles is called ________.

• Temperature

• Pressure

• Volume

• Density

Tags

NGSS.MS-PS1-4

If a substance does not have constant properties and composition, what type of matter is it?

• Mixture

• Pure substance

• Element

• Compound

A homogeneous mixture is one that is:

• Not uniform throughout

• Uniform throughout

• Can be simplified chemically

• A pure substance

Which of the following is an example of a physical change?

• Burning wood

• Melting ice

• Fireworks

• Burning steel wool

Which of the following is NOT an example of a chemical change?

• Burning a fire

• Fireworks

• Tearing paper

• Decomposition of hydrogen peroxide

Tags

NGSS.MS-PS1-2

Which of the following is NOT a sign of a chemical reaction?

• Gas produced

• Light

• Temperature change

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

Fill in the blank: Diatomic elements are pure substances that form molecules of two atoms of the same element bonded together. Examples include Br₂, I₂, N₂, Cl₂, H₂, O₂, and _____

• F₂

• C₂

• S₂

• P₂

Tags

NGSS.MS-PS1-1

Which two particle diagrams represent mixtures of diatomic elements? (Key: ○ = atom of one element, ● = atom of another element)

• A and B

• A and C

• B and C

• B and D

Tags

NGSS.MS-PS1-1

Place an X on the temperature axis, to represent the freezing point of this substance.

• At 0°C

• At 50°C

• At 100°C

• At 25°C

Tags

NGSS.MS-PS1-4