Physical & Chemical Changes
What is a physical change?
What is a change that alters the form or appearance of matter without turning it into a new substance?
What are two common physical changes you can observe in matter?
What are changes of state (melting/freezing/boiling) and changes of size/shape (cutting, folding, breaking)?
What is mass?
What is the amount of matter in an object?
What is the equation to calculate Density?
What is Density=Mass/Volume?
What is Matter?
What is anything that has mass and takes up space?
What is a chemical change?
What is a change that produces one or more new substances with different properties?
What are two common signs or evidence that a chemical change has taken place?
What are fizzing/gas production, color change, rust/tarnishing, light or temperature change?
What are volume and weight?
What is volume (the amount of space an object takes up) and weight (the measure of the force of gravity on an object)?
Object A has a mass of 86g and a volume of 86cm3. What is its density?
What is 1g/cm3?
Which of these are examples of matter and which are NOT matter?
A human being
Air inside a balloon
Sound from a speaker
Light
Pencil
Matter: A human being and air inside a balloon (they both have mass and take up volume)
NOT Matter: Sound from a speaker and light (they are forms of energy, not matter)
Is crushing an aluminum can a physical or chemical change, and why?
What is a physical change, because it only changes the object's shape/size and does not form a new substance?
What concept states that matter cannot be created or destroyed during physical or chemical changes?
What is the Law of Conservation of Mass?
What is the formula for finding the volume of a regular solid rectangular prism or cube?
What is Volume = Length × Width × Height (LxWxH)?
A sample of liquid has a mass of 24g and a volume of 8mL. What is its density?
What is 3g/mL?
What type of property is density?
What is a physical property?
Is iron rusting a physical or chemical change, and why?
What is a chemical change, because rust is a new substance formed when iron reacts with oxygen?
What is the main difference between an element, a compound, and a mixture?
What is: an element is a pure substance made of one type of atom, a compound is two or more elements chemically combined, and a mixture is matter physically combined?
What is the volume of a steel cube that has a length of 7 cm, width of 7 cm, and height of 7 cm?
What is 343 cm3?
A piece of wood has a mass of 150 g and a density of 0.6 g/cm3. What is its volume?
What is 250 cm3
Arrange these liquids in order from LEAST dense to MOST dense: Dish soap (1.03g/mL), Honey (1.36g/mL), Corn syrup (1.33g/mL), Corn oil (0.91g/mL), Water (1.00g/mL).
What are corn oil, Water, Dish soap, Corn syrup, and Honey?
When baking soda and vinegar mix and fizz, what type of change has occurred, and what is one piece of evidence?
What is a chemical change, and evidence includes gas formation (fizzing/bubbles)?
What is the difference between a heterogeneous mixture and a homogeneous mixture?
What is: a heterogeneous mixture has visibly different parts that are not evenly mixed, while a homogeneous mixture is uniformly mixed throughout?
What is the name of the method used to measure the volume of irregularly shaped objects (like rocks or keys), and how do you do it?
What is water displacement? (Measure initial water level in a graduated cylinder, drop in the object, measure the new water level, and subtract the two volumes).
A gold ring has a volume of 2.5 cm3 and a density of 19.3 g/cm3. What is its mass?
What is 48.25 g
How many different elements and how many total atoms are in one molecule of methanol (CH3ONa)?
What are 4 different elements (C, H, O, Na) and 6 total atoms (1 Carbon, 3 Hydrogen, 1 Oxygen, 1 Na(sodium))?