States of Matter
State of matter that has a definite shape and does not take the shape of its container.
What is a solid?
Anything that has mass and takes up space.
What is matter?
A mixture in which one substance dissolves evenly in another.
What is a solution?
Heat is considered energy. True or false?
True
Which of the following materials would be attracted to a magnet: wood, steel, plastic, or rubber?
What is steel?
State of matter that takes the shape of its container but might not fill it.
What is a liquid?
The amount of "stuff" in an object.
What is mass?
The ability of one substance to dissolve in another.
What is solubility?
What happens to particles when matter is heated?
Particles gain energy and move faster.
Which pair below are BOTH good electrical conductors?
Styrofoam & rubber ball
craft stick & washer
penny & gold ring
plastic spoon & tin foil
What is a penny and gold ring?
State of matter that has no definite shape and fills a closed container completely
What is a gas?
The physical property that describes how easily a material can be scratched, bent, or dented.
What is hardness?
When we combined salt and water and left droplets on a piece of paper, the next day we found the salt left on the paper. What happened to the water?
What is evaporated?
At what temperature does water freeze and melt in degrees Fahrenheit?
32∘F
Name two good electrical conductors.
Possible answers: copper, gold, silver, iron, steel, aluminum
Name the change of state when a liquid becomes a gas.
What is evaporation?
The term that describes the ability of a material to attract certain metals like iron.
Is melting an ice cube a physical or a chemical change?
Physical change
Explain condensation in one sentence.
Condensation is the change of state from a gas to a liquid.
Which common kitchen tool is a good thermal and electrical conductor:
copper penny, wooden spoon, iron frying pan, or aluminum foil?
Explain briefly.
Iron frying pan (metal conducts heat well). Copper penny and aluminum foil are also metals—copper is especially a good conductor; wooden spoon is an insulator.
Describe, in one sentence, why a balloon filled with air becomes smaller when put in a very cold place.
Cooling removes energy from the gas particles, they move more slowly and take up less space, so the balloon shrinks.
Give two physical properties you could use to identify an unknown material and explain briefly how you would test one of them.
Answer: Examples: color/shape, hardness, magnetism, solubility, reflectivity. (Then explain one test, e.g., magnetism: use a magnet to see if the object is attracted.)
Name the principle that states the total amount of matter stays the same during changes of state, and give a classroom example.
What is Conservation of matter?
Hannah boils water for pasta and the water level goes down. Which process explains this and why did the water level fall?
Evaporation/boiling — some liquid water turned into water vapor (a gas) and left the pot, so the water level decreased.
List two materials that are good electrical insulators and explain one everyday use for an insulator.
Plastic and rubber (also wood and glass).
Example use: plastic coating around electrical wires prevents shocks and keeps electricity contained.