Lesson 1
Which example shows a chemical property?
A rock is gray.
A piece of glass is smooth.
Copper can react with substances and form a new substance.
A ball has a volume of 500mL.
Copper can react with substances and form a new substance.
What overall category describes a mixture that is not uniform in composition, where you can visually distinguish its different components or phases (like a salad or oil mixed with water)?
Heterogeneous mixture
Cutting a piece of paper, crushing a aluminum can, or breaking a pencil are examples of this type of change.
Physical Change
What are the main three states of matter?
Solid, Liquid. Gas
the ability of matter to dissolve in a liquid
solubility
A student puts sugar into water and stirs it. The sugar disappears into the water. What Property is being observed.
Solubility
Magnetism
Reflectivity
Corrosion
Solubility
You mix red drink powder into a pitcher of water until it turns completely see-through red. What type of mixture is this?
Solution
Melting a stick of butter in a microwave. Is what type of change?
physical change
In this state of matter, particles are packed tightly together in fixed positions and can only vibrate in place.
Solid
A characteristic of matter that can be observed and/or measured
Physical Property
Which is an example of a physical property?
A piece of wood burns
An apple rots
A metal spoon is shiny
Iron rusts
A metal spoon is shiny
What type of mixture features small particles dispersed throughout that do not settle out over time and scatter light via the Tyndall effect (like glue or slime)?
Colloid
True or False: Physical changes alter the shape, size, or state of a substance, but do NOT create a brand new substance.
True
In this state of matter, particles move quickly and freely in all directions, spreading out as far apart as possible to fill any container.
Gas
How energy such as electicity or heat can move through a material
Conductivity
Which list contains only physical properties?
color, texture, and volume
ability to rust, ability to burn, and ability to react
ability to burn, mass and corrosion
ability to react, solubility, and ability to rust
color, texture, and volume
What overall category describes any mixture that has a completely uniform composition and appearance throughout, down to the microscopic level (like air or brass)?
Homogeneous mixture
A change in matter where one or more new substances with completely different properties are created.
Chemical Change
In this state of matter, particles are close together but can slide or flow past one another smoothly.
Liquid
The way light reflects or bounces off of an obejct
reflectivity
Mia places a metal spoon and a wooden spoon in the sun. The metal spoon gets hot faster. Which property helps explain this?
Magnetism
Conductivity
Solubility
Reflectivity
Conductivity
Muddy water or oil-and-vinegar dressing. Is an example of what type of mixture?
Suspension
Copper statues (like the Statue of Liberty) turning from shiny brown to green over time is caused by this process.
a chemical change (tarnishing/patina formation with atmospheric gases)
Water droplets forming on the outside of a cold glass of lemonade on a hot summer day is caused by this process.
Condensation
the ability of a material to be attracted to a magnet, without needing to be a magnet itself
magnetism