Density
What property tells how much matter is packed into a certain amount of space?
Density
What are the three common states of matter?
Solid, liquid, and gas.
What happens to a solid when it is heated enough to become a liquid?
It melts.
What is mass?
The amount of matter in an object.
What is a material that is attracted to a magnet called?
A magnetic material.
An object has a density greater than water. Will it sink or float?
How are the particles in a solid arranged?
They are packed closely together and vibrate in place.
What happens to liquid water when it is cooled enough?
It freezes and becomes a solid.
A student measures an ice cube and finds that it has a mass of 7 grams. What will happen to its mass when it melts?
Its mass will remain 7 grams.
Name one material that is commonly attracted to magnets.
Iron or steel.
An object has a density less than water. Will it sink or float?
It will float
How are the particles in a liquid different from the particles in a solid?
Liquid particles are close together but can move past one another.
What change of state happens when a gas cools and becomes a liquid?
Condensation.
What is volume?
The amount of space an object or substance takes up.
Would a plastic bead be attracted to a magnet?
No.
A cork floats in water, while a grape sinks. Which has greater density: the cork or the grape?
The grape
What happens to the particles in a substance when it is heated?
The particles move faster.
An ice cream cone is left outside on a hot summer afternoon. What will most likely happen to the ice cream?
It will melt.
A student pours 50 mL of water into a container. What does the 50 mL measure?
The volume of the water.
Which two do NOT belong in a collection of magnetic objects: a paper clip, plastic beads, iron shavings, steel ball bearings, or an aluminum can?
Plastic beads and the aluminum can.
Object A sinks in water. Object B floats in water. Which object has the lesser density?
Object B
An ice cube changes from a solid into liquid water. Did the particles disappear?
No. The particles are still there; their movement and arrangement changed.
Liquid wax drips down a candle while the candle is burning. After the flame is put out, the wax becomes solid again. What caused this change?
The wax cooled, causing it to change from a liquid to a solid.
An ice cube has a mass of 7 grams. It melts into liquid water. What happens to the amount of matter, and what happens to its state?
The amount of matter stays the same, but the state changes from solid to liquid.
A student tests three objects with a magnet. Object 1 is attracted to the magnet. Objects 2 and 3 are not attracted. Which object could be a steel paper clip?
Object 1.