Assessment on Pure Substance

Hey there! Can you tell me what a pure substance is?

• A mixture of oil and water

• A substance with a changing chemical composition

• A mixture of various chemical elements

• A substance with a fixed chemical composition

Hey there! Can you help Ethan figure out which of the following is considered a pure substance?

• Air

• Oil and water mixture

• Nitrogen

• Saltwater

During a magical science experiment, Anika, Maya, Zoe, and their friends observed molecules arranging themselves in a three-dimensional pattern during which phase?

• Gas

• Liquid

• Plasma

• Solid

Hey there! Let's talk about what happens to the molecules in the liquid phase compared to the solid phase.

• They are at fixed positions

• They can dance around freely like Ava at a party

• They are far apart from each other

• They are arranged in a lattice pattern

Which phase of matter has molecules that move freely and collide with each other?

• Solid

• Liquid

• Gas

• Plasma

Hey there! Can you tell me what a compressed liquid is also known as?

• Saturated liquid

• Superheated vapor

• Saturated vapor

• Subcooled liquid

What temperature makes Luna and Evelyn's water dance at 1 atm pressure?

• 50°C

• 75°C

• 150°C

• 100°C

Hey there! Can you tell me what we call a liquid that is just about to turn into vapor?

• Compressed liquid

• Saturated vapor

• Superheated vapor

• Saturated liquid

Which state is the ultimate showdown between liquid and vapor?

• State Harper

• State Noah

• State Avery

• State 1

Hey there! Can you tell me, what do we call a vapor that is just about to turn into a liquid?

• Saturated vapor

• Superheated vapor

• Compressed liquid

• Saturated liquid