Phase Change
The phase change from a solid to a liquid.
What is melting?
A property of matter that can be observed or measured without changing the substance's identity.
What is a physical property?
This state of matter has a definite shape and definite volume.
What is a solid?
A possible explanation for an observation that can be tested.
What is a hypothesis?
Matter made of only one type of atom.
What is an element?
The phase change from a gas to a liquid.
What is condensation?
Reactivity, radioactivity, and the ability of iron to rust are examples of this type of property.
What are chemical properties?
This state has neither a definite shape nor a definite volume and expands to fill its container.
What is a gas?
Information that is directly gathered using your five senses or scientific instruments.
What is an observation?
Water (H₂O) is made from hydrogen and oxygen chemically bonded together. What type of matter is water?
What is a compound?
The phase change in which a solid changes directly into a gas without becoming a liquid.
What is sublimation?
Density, color, melting point, and boiling point are all examples of this type of property.
What are physical properties?
This state has a definite volume but takes the shape of its container.
What is a liquid?
A scientific statement that describes a consistent pattern or relationship observed in nature.
What is a scientific law?
A sample contains iron filings and sulfur powder. The two substances can be physically separated using a magnet. What best describes this mixture?
What is heterogeneous?
A gas changes directly into a solid. What is this phase change called?
What is deposition?
Is "flammability" a physical property or a chemical property?
What is a chemical property?
In which state of matter are particles generally packed closest together and only vibrate around fixed positions?
What is a solid?
A student sees water droplets forming on the outside of a cold glass and says, "Water vapor from the air must have condensed." Is this an observation or an inference?
What is an inference?
Salt water contains salt and water that are physically combined. What type of matter is it?
What is a homogenous solution?
At this special point on a phase diagram, the solid, liquid, and gas phases can all exist simultaneously.
What is the triple point?
A student observes that a piece of metal is shiny, conducts electricity, and can be hammered into a thin sheet. Are these physical or chemical properties?
What are physical properties?
This law describes the relationship between pressure and volume
What is Boyle's Law?
A well-supported explanation of how or why a natural phenomenon occurs, supported by a large body of evidence.
What is a scientific theory?
a glass of milk contains water, sugars, and tiny suspended fat particles. what is this?
What is a colloid?