Chem in Community 2022-23 - Unit 1 Matter (Part 1)

Classifying Matter (Day 2)

100

Matter is

What is - Anything that has mass and volume ?

200

A compound is

What is - Two or more elements that have been chemically combined (ex. HCl or NaCl) ?

300

A heterogeneous mixture is

What is - mixture that is NOT uniform throughout ?

400

A homogeneous mixture is

What is - A mixture that is uniform throughout ?

500

An element and a compound are different because

What is - An element is a pure substance made of the same type of atom (ex: H), but a compound is a pure substance made of two or more different atoms chemically combined in a specific ratio (ex: H₂O) ?

Physical & Chemical Properties of Matter (Day 3)

100

The pH of a substance is this type of property

What is - a physical property ?

200

The flammability of a substance is this type of property

What is - a chemical property ?

300

A physical property is

What is - a property that can be observed without changing the chemical composition of the substance ?

400

A chemical property is

What is - observed during or after a chemical change has occurred ?

500

Sally wrote the wrong set of notes for her class. She ripped the paper, then burned it. The ability for the paper to be ripped is a ______ property, and the ability for the paper to burn is a _______ property.

What is - ripped = physical property, burn = chemical property ?

Density (Day 4)

100

There are two pieces of information you need to find the density of an object

What is - mass and volume ?

200

Objects with LESS density do this

What is - float ?

300

Objects with MORE density do this

What is - sink ?

400

The formula for density is this

What is - D = M / V ?

500

If the mass of a cube is 20g and the volume is 2cm³, the density of the cube is

What is - 10g/cm³ ?

Solubility (Day 6)

100

The substance that does the dissolving in the solution is called the

What is - the solvent ?

200

The substance that is dissolved in a solution is called the

What is - the solute ?

300

The dissolving rate of a solute can be increased in three ways. Those three ways are

What is - 1. decrease the particle size (crush it), 2. increase temperature (heat it), 3. increase motion of particles (stir it/shake it) ?

400

As temperature increases, solubility of a substance

What is - increases ?

500

Ms. Mitchell has to make tea for her tea party, but her friends will arrive in less than 20 minutes! In order to quickly dissolve the sugar (solute), Ms. Mitchell can do this to the tea (solvent)

What is - heat the tea ?