Matter Matters
What are the three states of matter?
Solid, liquid, gas
Which tool would you use to measure the mass of an object?
A balance or scale
What kind of materials are attracted to magnets?
iron, nickel, and cobalt
What is a mixture?
A combination of two or more substances that keep their properties
What is a conductor?
A material that allows electricity or heat to pass through.
What property of matter describes how much space it takes up?
Volume
What happens to an object's mass when it is cut into pieces?
The total mass stays the same; only the size changes.
Is wood magnetic? How do you know?
No, because it does not contain magnetic metals.
What is the solvent in saltwater?
Water—it dissolves the salt.
Name one common conductor.
Copper, aluminum, or silver.
What happens when a liquid turns into a gas?
Evaporation
Does a larger object always have more mass than a smaller object?
No, because mass depends on the material, not just size
What is solubility?
The ability of a substance to dissolve in another substance.
Is lemonade a mixture or a solution?
Solution—because everything is evenly mixed.
What is an insulator?
A material that does not let heat or electricity pass through easily.
Is air considered matter? Why or why not?
Yes, because it has mass and takes up space
If an object is very heavy but small, does it have high or low density?
High density!
Which dissolves faster in water: whole sugar cubes or crushed sugar? Why?
Crushed sugar, because smaller pieces dissolve faster.
What is one way to separate a mixture of sand and iron filings?
Use a magnet to pull out the iron.
Name one common insulator.
Rubber, wood, or plastic.
What is the term for a substance that keeps its shape regardless of its container, and how is it different from a liquid?
A solid—solids have a fixed shape and volume, while liquids take the shape of their container but keep the same volume.
Why do some objects float in water while others sink?
Objects with lower density than water float; those with higher density sink.
Why does stirring a solution help something dissolve faster?
It moves the particles around, helping them mix with the water.
What is the difference between a solute and a solvent?
A solute is the liquid that does the dissolving and the solvent is the substance that dissolves in the liquid.
Why do electricians wear rubber gloves?
Rubber is an insulator and protects them from electric shocks