Definitions.
The energy that an object has because it is moving
Kinetic Energy.
The relative size of things
Relative size refers to how large something appears compared to another object.
________ is the energy that an object has because it is moving.
Kinetic Energy.
To ________ means to provide evidence that goes against a claim.
Refute.
Why does a solid keep its shape according to the phase change science curriculum?
A solid keeps its shape because its atoms/molecules are tightly packed and strongly bound, resisting deformation.
A group of atoms joined together in a particular way
Molecules.
A pull between two molecules that is always the same for a substance
Cohesion.
________ is the way molecules in a substance move around relative to each other.
Molecular Motion.
________ is the relative size of things.
Scale.
What is a phase change, and how does it relate to the movement of molecules?
Phase change: matter changing state (solid, liquid, gas) due to temperature/pressure changes. It affects how molecules move; more energy allows more movement.
A measure of how hot or cold something is
Temperature.
A noticeably different form or state of the same substance
Phase Change and Change of State.
________ is a pull between two molecules that is always the same for a substance.
Molecular Attraction.
________ is a measure of how hot or cold something is.
Temperature.
What molecules have a stronger attraction nitrogen or water and explain with an example.
Water has stronger attraction than nitrogen due to hydrogen bonding. Water is liquid at room temperature (strong attraction), while nitrogen is a gas (weak attraction).
To provide evidence that goes against a claim
Refute.
A ________ is a group of atoms joined together in a particular way.
Molecule.
A truck was carrying a substance in a tank. The molecules of that substance were moving away from each other. The truck parked overnight in a place where energy transferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after energy was transferred out of them.
Gas molecules in the morning: moving rapidly, randomly, and far apart. Even after energy loss, they still had enough energy to stay dispersed as a gas.
The way molecules in a substance move around relative to each
Vibrating , rotating , and translucent.
________ refers to a noticeably different form or state of the same substance.
Allotrope.