Physical Properties
& Changes
Chemical Properties
& Changes
The Periodic Table
Density
The Scientific Method
100
When a physical change occurs, no new _________ is formed.
What is compound or substance?
100
A chemical change is different from a physical change because in a chemical change a new __________ is formed.
What is substance or compound?
100
The periodic table is a chart that displays all __________ currently known to man.
What is elements?
100
The formula for calculating density is _______ / ________.
What is mass / volume?
100
The scientific method is a series of steps used to carry out a scientific ___________.
What is experiment or investigation?
200
What are two reasons we know that melting ice cream is only a physical change?
What is because melting the ice cream does not form new compounds, and by simply reducing the temperature the ice cream will return to its solid state?
200
Chemical properties are only observable and measurable when a _________ ________ occurs.
What is chemical change?
200
The atomic number of an element is equal to the number of __________________.
What is protons in the nucleus?
200
The units used to measure the density of a solid are ________ and to measure a liquid are ________.
What are g/cm3 and g/mL?
200
The very first step in the scientific method is to state a scientific __________. Which will then be followed up by researching the topic.
What is question?
300
Physical properties that do not change if the size of the sample changes are called ___________ properties. Luster, ductility, melting/boiling point, temperature, and density are all examples.
What are intensive?
300
What are 4 evidences of a chemical change occurring?
What are changes in color, odor, temperature, form, or the formation of light, heat, sound, gas, bubbles, or a precipitate.
300
Elements that share the same periods have the same number of energy levels for their electrons. What is the maximum number of energy levels an atom can have?
What is 7?
300
The definition for density is the mass per unit volume of a substance or object. Explain what is meant by the mass per unit volume.
Answer to be determined by judge!
300
The steps of the scientific method include:
What is state the question, research, hypothesize, design and test the experiment, collect data/analyze data, and conclusion.
400
Density is an __________ property because when you change the size of the sample the mass and volume are changed proportionally.
What is intensive?
400
The columns in the periodic table are called families. All the elements in a family share the same number of electrons in their outermost shell. Which group of elements is not included in these families?
What is the transition metals?
400
The columns on the periodic table are called groups. All of the elements in each group share the same number of ___________ in their outermost energy level.
What is electrons?
400
Density is an intensive physical property. However, if the __________ or __________ changes without changing the mass then the density can change.
What is temperature or volume?
400
One way of analyzing data is to create charts, tables, and graphs. When graphing data the independent variable goes on the ____ axis and the dependent variable goes on the ___ axis.
What is the x and y?
500
What are two extensive physical properties shared by all matter?
What are mass, length, or volume?
500
In a chemical change, the total number of _________ in the reactants is the same as in the products. However, the atoms may be rearranged to form new ___________.
What are atoms and compounds/substances?
500
Elements are also placed in to groups based on similar characteristics and chemical properties. Name 4 of these groups.
What are alkali, alkaline, transition elements, other metals, metalloids, nonmetals, halogens, noble gases, and the lanthanoid/actinoid series (rare earth elements).
500
A piece of wood measuring 5cm x 6cm x 2cm has a mass of 120 g. Would this piece of wood float or sink in water?
What is the wood would sink because it would have a density greater than .99 g/cm3?
500
Prior to starting the experiment, you should list procedures and identify the independent, dependent, and controlled variables. Define the different variables.
Controlled- variables that are kept constant so have no effect Independent- variable being manipulated by experimenter Dependent- variable that is affected by the independent
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