1. Which statement best describes a pure substance?
2. What is matter defined as in physical science?
3. What happens during a change of state such as melting or boiling?
States of matter — examples?
Solid, liquid, gas, plasma.
States of matter
Solid, liquid, gas, plasma.
Atomic nucleus — contains?
Protons and neutrons.
Physical properties
Measurable characteristics without changing composition.
Pure substances
Made of only one substance type.
Atomic nucleus
Central, dense, contains protons and neutrons.
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