Properties of Matter
What tool would you use to measure the mass of an object?
A balance or digital scale
An object sinks in water. Is the object more or less dense than water?
More dense
What is a mixture?
Two or more substances combined together.
What does thermal conductivity describe?
How well a material allows heat energy to move through it.
Which state of matter keeps its own shape?
Solid
A rock has a mass of 75 grams. You add a 25-gram rock to it. What is the total mass?
100 grams
An object floats in water. Is the object more or less dense than water?
Less dense
When sand and gravel are mixed together, do the sand and gravel keep their physical properties?
Yes
Look at these thermal conductivity values:
Which metal has the highest thermal conductivity?
Metal B
Which state of matter takes the shape of its container?
Liquid
You run your hand over a material and notice that it feels rough. What physical property are you investigating?
Texture
A piece of cork floats in water while a metal bolt sinks. Which object is more dense than water?
The metal bolt
A student mixes paper clips and sand. Which tool could be used to separate the paper clips if they are magnetic?
A magnet
A scientist wants to know if a screw is magnetic. What should the scientist do?
Test the screw with a magnet.
Which state of matter spreads out to fill the available space?
Gas
Name three physical properties that you could investigate when given an unknown substance.
Mass, Volume, Texture, Physical State, etc
A scientist places three objects in water.
Which object is definitely more dense than water?
Object A
You have a mixture of sand and water. Name one method that could be used to separate them.
Pouring off the water, evaporating the water, or passing the mixture through a sieve.
Which would be a better material for carrying electrical energy through a wire: copper or rubber?
Copper
Name all the items that are solids:
Apple, pencil, and rock
A container and its contents have a mass of 180 g. A student adds 40 g of another substance. What should the new mass be?
220 g
A student says, "Two objects both float, so they must have exactly the same density." Is the student's statement supported by the evidence? Explain.
No. Both objects are less dense than water, but floating alone does not show that they have exactly the same density.
A student mixes two substances together. After mixing, each substance still has its original physical properties. What does this evidence suggest?
The substances formed a mixture.
Why is rubber placed around many electrical wires?
Rubber is an insulator. It helps prevent electrical energy from flowing outside the wire.
A mystery substance is placed into a container. It keeps the same shape and does not take the shape of the container. What state of matter is it most likely?
Solid