Define “matter”
Anything that has mass and occupies space.
True or false: “Energy” is a form of matter.
FALSE
Energy is not matter; it is the capacity to do work.
What are the three states of “matter”?
Solid, liquid, and gas.
Define “solid”.
A state of matter with a definite shape and volume.
Define “liquid”.
A state of matter with a definite volume but no definite shape.
Define “gas”.
A state of matter that has neither a definite shape nor volume.
What is “density”?
How much stuff is packed into a certain volume of space.
Fill in the blank: “Melting” is the process of a solid becoming ______.
A liquid
What is “evaporation”?
The process by which a liquid turns into a gas.
Define “sublimation”.
The transition of a substance from solid to gas without becoming liquid.
True or false: “Condensation” is the process of gas turning into a solid.
FALSE
Condensation is gas turning into a liquid.
What is “mass”?
The amount of matter in an object, typically measured in grams or kilograms.
Fill in the blank: “Atoms” are the basic building blocks of ______.
Matter
What is “physical change”?
A change that affects one or more physical properties of a substance.
Define “chemical change”.
A transformation where one or more substances are altered into new substances with different properties through a chemical reaction.
True or false: Atoms are the smallest units of matter.
TRUE
Atoms combine to form molecules, which make up all substances.
Fill in the blank: Solids have a definite _______ and volume.
shape
True or false: Gases have a fixed volume.
FALSE
Gases expand to fill their container and do not have a fixed volume.
