States Of Matter
What state of matter is water?
Liquid
What is it called when a solid changes in to a liquid?
Melting
What is a reversible change?
Something that can change back
What tool do we use to measure temperature?
Thermometer.
What state of matter is a rock?
Solid
What is it called when a liquid turns into a solid?
Freezing.
What is a irreversible change?
Something that cannot change back
Name one type of fossil fuel.
Petrol, oil, coal, (natural) gas, etc
What state of matter is carbon dioxide?
Gas
What is it called when a liquid turns into a gas? (this happens in the water cycle)
Evaporation
Name 2 objects that have reversible changes.
Answers may be different.
Name two types of renewable energy.
Solar, tidal, hydro, wind, geothermal, etc
What state of matter is jelly?
Solid
At what temperature does water boil and turn into a gas?
100 Degrees Celsius
Name 3 object that have irreversible changes.
Answers may be different.
Molecules (things everything is made out of) constantly move. What happens to these molecules when something heats up?
They move faster and spread out
There are actually a fourth state of matter. Solids, liquids, gasses and _______.
Plasma
What is it called when a gas turns in to a liquid? (this happens in the water cycle)
Condensation
Reversible and irreversible changes go by a different, more complicated names. What are they?
Physical and Chemical Changes.
What does the word conduction mean?
Refers to materials that let heat travel through them easily, like metals. The opposite is insulators that stop heat. This is why cooking tools have rubber/plastic handles so you don't burn your hand.