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Force/Motion Week 5
Question | Answer |
---|---|
Chemical | An element or compound |
Chemical Change | A chemical reaction; a process that changes substances into new substances |
Physical Reaction | A change in matter that does not affect its chemical composition |
Chemical Reaction | A chemical change; a process that changes substances into new substances |
Acid | Any substance with a pH less than 7; acids turn blue litmus paper red |
Atom | The smallest unit of an element that has the properties of that element |
Matter | Material that has mass and takes up some amount of space |
Compound | A chemical combination of two or more elements |
Molecule | Two or more atoms joined together |
Element | A pure substance that cannot be broken down into simpler substances by chemical reactions |