scientific method
This is the first step of the scientific method, where you identify what you want to learn or solve.
What is asking a question or stating a problem?
This is the smallest unit of matter that retains the properties of an element.
What is an atom?
The vertical columns on the periodic table are called ______, and the elements in them often have similar properties.
What are groups or families?
When a chemical reaction releases heat, it is called ______. When it absorbs heat, it is called ______.
What is exothermic; endothermic?
what is Ms. Jacksons first name?
Hollye
This is a possible explanation for an observation that can be tested through experiments.
What is a hypothesis?
When two or more atoms chemically bond together, they form a ______.
What is a molecule?
Elements on the left side of the periodic table that are shiny, good conductors, and malleable are called ______.
What are metals?
n the molecule H₂O, how many hydrogen atoms and how many oxygen atoms are there?
2 hydrogen atoms and 1 oxygen atom.
what is the nickname for my son?
my lil Jew ( Jensen Everette Wood)
In an experiment testing how temperature affects the rate of dissolving, temperature is the ______ variable, and the dissolving rate is the ______ variable.
Independent variable; dependent variable
The center of an atom, which contains protons and neutrons, is called the ______.
What is the nucleus?
The number of valence electrons determines how an atom will do what with other atoms?
What is bond or react?
In the compound C₆H₁₂O₆ (glucose), how many total atoms are in one molecule?
24 total atoms (6 carbon + 12 hydrogen + 6 oxygen).
on average how many shark attacks do we get in the USA per year? ( ill take the closest possible answer within 2)
in 2024, there were 28 unprovoked shark attacks in the U.S
In an experiment, this group is used for comparison and does not receive the independent variable.
What is the control group?
Question: A student observes that aluminum is shiny, can be bent into sheets, and reacts with acid to produce bubbles. Which of these are physical properties and which are chemical properties?
Physical properties: Shiny appearance, can be bent into sheets
Chemical property: Reacts with acid to produce bubbles
xygen has six valence electrons. Based on this, how many more electrons does it need to have a full outer shell
It needs 2 more electrons to fill its outer shell.
The equation below is not balanced:
H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
how tall is coach wood in inches?
77 inches ( 6 foot 5 inches)
A student wants to test how the amount of salt added to water affects how fast the water freezes. She makes several cups of water with different amounts of salt and records how long each takes to freeze. Identify the independent variable and the dependent variable in this experiment.
Independent variable: Amount of salt added to the water
Dependent variable: Time it takes the water to freeze
n a chemical reaction, 10 grams of hydrogen react with 80 grams of oxygen to form water. According to the Law of Conservation of Matter, how much water should be produced, and why?
90 grams of water, because matter cannot be created or destroyed — the total mass of the reactants equals the total mass of the products.
what are the names of the 4 families of elements we covered
1 alkili metals
2. alaline earth metals
3 halogens
4 noble gases
Balance the following chemical equation:
Fe + O₂ → Fe₂O₃
4Fe + 3O₂ → 2Fe₂O₃
when is the last day of the school semester
December 19th