Properties of Matter Flashcards
Particle Theory
- All matter is made up of particles.
- Different substances are made of different particles.
- Particles are in constant random motion.
- Particles move faster when heat increases.
- Particles attract each-other.
What is a pure substance?
A substance made up of one type of particle.
What is a mixture?
A substance made up of two or more different particles.
What is a mechanical mixture?
A substance where you can distinguish different types of matter. ex: granola bars.
What is a solution?
A uniform mixture of two or ore substances. ex: clear apple juice.
What is an alloy?
A solution of two or more metals.
What are physical properties?
A feature of a substance that can be determined without changing the composition of the substance.
Qualitative vs Quantitative
Qualitative: Does not have numerical data, and cannot be measured (colour, texture, odour)
Quantitative: Has numerical data, and can be measured (height, weight, mass, density)
What is physical change?
A change in which the composition of a substance remains the same and no new substances are produced. Ex. folding paper
What are chemical properties?
A feature of a substance that is determined when the composition is changed and one or more new substances have been produced.
What is chemical change?
A change in the starting substance(s) and the production of one or more new substances.
How can you tell if a chemical change has occured?
-Colour change
-Odour produced
-Gas produced
-A new solid is seen (often powder called precipitates)
-A change in temperature
-Light produced
What are characteristic physical properties?
A physical property that is unique to the substance such as density, melting/freezing/boiling point.
