When water boils what states of matter are changing?
liquid turns to a gas
100
What -tion word happens when a liquid changes into a gas?
evaporation
100
When an object changes from a solid to a liquid, changing state, what stays the SAME?
the object's mass
100
Which one of these is NOT a physical change: breaking, cutting, crumpling, burning, or folding.
burning
100
Give an example of a chemical change.
burning fuel or cooking
200
What do we call the flow of heat?
thermal energy
200
What are two processes that can change a liquid to a gas? Only one of these is a -tion word. The other is not.
evaporation and boiling
200
What is happening to the particles of a liquid when they slow down and move closer together?
it is cooling or it is changing state into a solid
200
Name three properties that can change when a substance undergoes a physical change.
texture, shape, size
200
List three things that can change in an object when it goes through a chemical change.
texture, smell, the object itself can change, the properties of the object can change
300
An insulator won't transfer what?
heat
300
What -tion word must have two objects touching in order for heat to be transfered from one thing to another.
conduction
300
Describe an object that would have fast moving particles.
something that is a gas or something that has had heat applied to it (fire, sun, hot chocolate)
300
How are physical changes like chemical changes?
They both change a substance.
300
How are chemical changes different from physical changes?
Chemical changes start with one type of matter and ends with another. Physical changes start and end with the same type of matter.
400
Why is rust considered a chemical change?
When something rusts is changes from iron into rust. I cannot get the iron back.
400
Explain a way that energy travels by radiation.
when the sun's rays hit the Earth that's radiation
400
Explain to me why the full water bottle with the tightly attached cap I put in the freezer burst by the next day.
water expands when it freezes when the liquid turns into a solid
400
Explain why folding and bending rocks layers are a physical change.
the rocks layers are still rocks, they don't change into something else
400
How is baking cookies or baking bread an example of a chemical change? Be specific...how does the change happen? What properties change?
Heat from the oven changes the batter into bread or cookies changing the taste, texture, and color.
500
I want to keep my coffee warm when I have bus duty out in the cold. What type of material should I keep my coffee in and why?
something metal because thermal energy travels better through metal. Metal is a good conductor.
500
When you boil water to make mac and cheese heat is transferred through the water by what -tion word?
convection
500
There has been no rain for three weeks and the sun has been shining brightly for just about every day. How would this affect the water level in the large pond I have in my backyard? Be specific!
The sun's rays evaporate the water from the pond causing the water level to go down.
500
List all 5 of the things to look for to decide if a physical change has taken place.
size, shape, texture, state, position
500
List all 6 of the things to look for to decide if a chemical change has taken place.
a change in color, a change in scent, a change in temperature, if you see bubbling, if you hear fizzing, if it gives off light