Out of inquiries, theories, variables and hypotheses; this one is the factor that is controlled so that researchers can draw logical conclusions from an experiment.
What are variables
100
Tool used to measure the mass of an object.
What is a balance.
100
This group is the most reactive metals found on the periodic table.
What is Group 1, Alkali Metals
100
The chemical reactivity of metals tends to do this from left to right across the periodic table.
What is decrease
100
This is the very small center of an atom.
What is the nucleus
200
This is a possible explanation for a set of observations or answer to a scientific question.
What is a hypothesis
200
This is being measured when using a graduated cylinder.
What is volume?
200
This is the state that most nonmetals are found at room temperature.
What is a gas
200
This group of elements have some properties of metals and some of nonmetals.
What are the metalloids
200
When material can be pulled out, or drawn, into a long wire, it is said to be this
What is ductle
300
Scientists develop these to study things that are too large or small; too far away; or too dangerous to study.
What is a model
300
The basic unit of length in the metric system.
What is the meter.
300
The atomic number of an element is based on this.
What is the # of protons
300
This is the name of the row of an elements
What is a period
300
Fluorine, chlorine, bromine and iodine are part of this family in the periodic table.
What are the Halogens
400
Theis type of observation deals with a number or an amount
What is a quantitative observation
400
This metric measurement unit would likely be used to measure an insect.
What is a millimeter
400
From the element's location in the periodic table, you can predict this
What is characteristics/properties/reactivity
400
This element has 4 energy shells and 2 valence electrons.
What is Calcium (Ca)
400
Ernest Rutherford discovered this using the gold foil experiment.
What is the proton
500
These 2 things should be done when a scientific investigation produces contradicting data to existing conclusions of previously proven experiments.
What is check data for errors and repeat experiment
500
This is the density of a wooden block with a mass of .27 grams and a volume of .1cm 3 (cubed).
What is 2.7g/cm3 (cubed)
500
This property is displayed by elements that easily transmit electricity or heat.
What is conductivity
500
This element is non-reactive and has 3 energy shells.
What is Argon (Ar)
500
Elements in a row have properties that in a _____________