Scientific Inquiry
This is the name for the variable that the scientist purposefully changes in an experiment.
Independent Variable
Thermal energy always travels in this direction (from one temperature extreme to the other). What direction is this?
Hot to cold
When wax in a lava lamp gets warmer, what happens to the density, causing it to rise.
This is a substance made up entirely of only one type of atom.
Element
Ripping paper or melting ice are examples of this type of change, which does not create a new substance.
Physical change
If you are recording the color, smell, or taste of a substance, you are collecting this specific type of data.
Qualitative data
This method of heat transfer occurs through direct contact, such as a metal spoon getting hot in a bowl of soup.
Conduction
Molecules that are "spread apart" result in this type of density (High or Low?).
Low
This is a chemical substance made up of two or more different kinds of atoms bonded together
Compound
In a chemical equation, the substances located on the left side of the arrow are called this.
Reactants
These are the variables that must stay the same throughout an entire experiment to ensure a fair test.
Constant Variable
As the temperature of a substance increases, what happens to the kinetic energy of its molecules?
It increases
Explain why wax sinks when it reaches the top of a lava lamp.
It cools down
How many total atoms are found in one molecule of Water
3
List three specific signs (indicators) that a chemical reaction has taken place.
Heat, gas, light produced
Bubbling
Smell or color change
To measure the mass of an object in grams, a scientist would use this specific tool.
Balance
Describe the molecular arrangement of a gas compared to a solid
Gas molecules are spread far apart, while solid molecules are packed tightly together
What happens to the density of a substance as you increase its temperature?
It lowers
Identify the following as either an Element or a Compound: CO2CNH3
Compound
In the reaction between baking soda and vinegar, what happens to the original elements/compounds?
They change or rearrange to make something new
A student hypothesized that robins prefer large bird houses to small ones. He built four bird houses of different sizes to test his hypothesis. What was the independent variable in the student's study?
The size of the bird houses
Name the three types of thermal energy transfer.
Conduction, convection, radiation
How does a lava lamp work? Use these key terms in your explanation:
Heats or warms
Gets colder or cools
Less dense
More dense
Rising
Sinking
Wax heats at the bottom, the wax rises to the top as it becomes less dense, the wax then cools at the top as it becomes more dense, and then the wax sinks.
Is O2 a compound, element, or neither?
Neither, it is a molecule
How many hydrogen atoms are there in the reactants?
NaC2H3O2 + H2O
5