Properties of Matter
Characteristics that can be observed or measured without changing the substance.
What are physical properties?
The ability to sink or float in water
What is relative density?
A force that attracts certain metals.
Two or more substances combined physically.
What is a mixture?
The kind of change you can see or feel.
What is a physical change?
Two physical properties of matter.
What is color, mass, volume, texture, shape, magnetism, or conductivity?
If an object floats in water, is it more or less dense than water?
Less dense
Iron, steel, nickel, or cobalt.
What are magnetic metals?
A mixture in which one substance dissolves in another.
What is a solution?
An example of a physical change from solid to liquid.
Ice melting
State of matter that has a definite shape and a definite volume
If a rock sinks in water, what can you conclude about its density?
It is more dense than water.
A material that allows electricity or heat to pass through easily.
What is a conductor?
In salt water, what is the solute?
Salt
A complete path that allows electricity to flow.
Closed circuit
These two states take the shape of their container, but one has definite volume while the other does not.
What are liquids and solids?
A piece of wood and a marble are the same size. The marble sinks and the wood floats. Which has the greater density?
The marble
A material that does not easily allow electricity or heat to pass through.
What is an insulator?
In salt water, what is the solvent?
Water
A broken path that stops electricity from flowing.
Open circuit
How are solids, liquids, and gases alike and different?
All are forms of matter that have mass and take up space. Solids have definite shape and volume, liquids have definite volume but not shape, and gases have neither.
Oil floats on top of water. Explain why.
Oil is less dense than water, so it stays on top.
Why would a plastic handle be used on a metal frying pan?
Plastic is an insulator and protects your hand from heat.
Compare a mixture and a solution.
Both combine substances, but in a solution the solute dissolves completely and appears evenly mixed.
A battery, wires, and light bulb are connected, but the bulb does not light because one wire is disconnected. Is the circuit open or closed? Explain.
Open circuit because the pathway is broken and electricity cannot flow.