Physical and Chemical Changes
A change that affects one or more physical properties of a substance without changing its chemical composition.
What is a physical change?
Speed is the distance traveled per unit of time.
What is speed?
Conduction, convection, and radiation.
What are the three methods of heat transfer?
A homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).
What is a solution?
Count the atoms that are in the molecule H2O?
What is 3?
Rust forming on iron.
what is an example of a chemical change.
Speed= Distance/Time
What is the formula used to calculate speed.
Heat transfer through direct contact between materials.
What is conduction?
The solute is the substance that is dissolved, while the solvent is the substance that does the dissolving.
What is the difference between a solute and a solvent?
In the chemical formula C6H12O6, how many carbon atoms are present
What is 6?
Indicators include color change, gas production, temperature change, or the formation of a precipitate.
What is a chemical change?
A car is traveling 30 miles in 25 minutes. And a truck is traveling 40 miles in 22 minutes. Who is traveling faster?
What is the truck?
Heat transfer through the movement of fluids (liquids and gases) caused by temperature differences.
What is convection?
The amount of solute in a given volume of solvent or solution.
What is concentration?
Name element has the chemical symbol Cl
What is Chlorine?
The arrangement of the molecules changes, but their chemical structure remains the same.
What is a physical change?
A horse runs 400 meters in 2 minutes. Solve for speed.
What is 200 meter/minute?
Heat transfer through electromagnetic waves, such as sunlight.
What is radiation?
By adding more solvent to decrease the concentration of the solute.
What is dilution?
Count the amount of oxygen atoms in the formula 4Fe2O3
What is 12?
Mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
What is the law of conservation of mass?
A book resting on a table will remain there until someone picks it up.
What is an example of Newton's first law?
The sun heats up the earth.
What is radiation?
A solution where no more solute can dissolve at a given temperature, like saltwater with excess salt.
What is an example of a saturated solution?
Count how many hydrogen atoms are present in the formula 3Ca(OH)2.
What is 6?