Unit 5 Quiz 2

What is the boiling point of water?

• 80 degrees Celsius
• 27 degrees Celsius
• 90 degrees Celsius
• 100 degrees Celsius

When water boils, what is inside the bubbles?

• Air
• Oxygen gas
• Water Vapor
• Hydrogen gas

What phase of matter is illustrated in "C"

• solid
• liquid
• gas
• melting

Why does the graph have two flat lines at "b" and "d"?

• Those are times when we took the water off the hot plate
• Those are phase changes where temperature doesn't change while adding heat
• The line is flat because the water is all in the solid or gas phase
• The line is flat because temperature increases the most at those locations

What is the phase change of a solid to a gas?

• sublimation
• depostion
• vaporization
• condensation

What happens to particle movement/speed when energy is added to a phase?

• Particles slow down
• Particles go faster
• Particles don't move
• Particles stay the same speed

How are solids different from liquids?

• particles in solids are moving freely around each other.
• particles in solids have no motion.
• particles in solids are vibrating in place.
• particles in solids have more motion than in liquids

When a substance changes from a solid to a liquid it is called

• Evaporation
• Condensation
• Freezing
• Melting

What is happening when my water bottle in the freezer goes from a liquid state to a solid state?

• melting
• evaporating
• freezing
• cutting

My glass of ice water is sitting in the sun and has droplets of water on the outside of the glass. What is happening?

• condensation
• evaporation
• melting
• freezing