States of Matter
What state of matter has particles that are tightly packed and vibrate in place?
What is a solid?
If a cube has a volume of 125 cm³ and a mass of 250 g, what is its density?
What is 2 g/cm³?
What happens to the energy of particles when a liquid becomes a gas?
What is the particles gain energy?
This type of bond forms when atoms share electrons.
What is a covalent bond?
Is melting ice an example of a physical or chemical change?
What is a physical change?
In which state of matter do particles move around freely and are spaced far apart?
What is a gas?
If two objects have the same volume but different masses, the object with the higher mass has a higher what?
What is density?
When thermal energy is removed from a gas, it usually undergoes this change.
What is condensation?
What is the smallest unit of an element that still retains the properties of that element?
What is an atom?
Which type of change involves the formation of a new substance?
What is a chemical change?
This is the process where a liquid turns into a gas without boiling.
What is evaporation?
Which two measurements are needed to calculate density?
What are mass and volume?
What happens to particle motion when a substance gains thermal energy?
What is particle motion increases?
The molecule ethane (C2H6) consists of what two types of atoms?
What are carbon and hydrogen?
True or False: Freezing juice into ice cubes is a chemical change.
What is false?
What is the term for a change from a solid directly to a gas?
What is sublimation?
True or False: Two objects with different volumes can have the same density.
What is true?
During which change of state do particles lose energy and move closer together?
What is freezing?
How does the molecular structure of polyethylene make it useful for plastic bags?
What is it is flexible because the molecules can slide past each other easily?
Burning wood is an example of what kind of change?
What is a chemical change?
When a gas cools down and becomes a liquid, this change of state is called?
What is condensation?
What happens to the density of an object if its mass increases while its volume stays the same?
What is the density increases?
Explain what happens to the particles in a substance when it melts.
What is the particles gain energy and move faster, allowing them to slide past each other?
What type of bond joins the hydrogen atoms to the carbon atoms in a molecule of ethane?
What is a chemical bond?
Identify one similarity between physical and chemical changes.
What is both involve changes in the state or properties of matter?