Matter is anything that takes up space and mass. All matter exists in one of three main physical states: solid, liquid or gas. In a solid, particles are packed tightly together so they can only vibrate in place, keeping a definite shape and volume. Solids also cannot be easily compressed. Particles in a liquid flow freely past each other and have a definite volume but change shape based on their container. Liquids can be poured easily. Gas particles move very rapidly and spread out, changing both shape and volume to fit their container. Adding or removing heat energy causes physical changes between the states of matter.
What is the main idea of the passage?
Matter exists as solids, liquids and gasesHeat causes changes between states of matterParticles vibrate in place in solidsLiquids can easily be pouredWhat makes up all matter?
AtomsEnergySpace and massContainersHow are solid particles arranged compared to liquids?
More spread outPacked tightly togetherThe same arrangementDiagonallyWhat allows liquids to change shape?
Low energyEasily compressingParticles vibratingTheir container