Science Skills
What is the step in the Scientific Method where you use your senses to gather facts.
What is an Observation?
A push or pull exerted on an object.
What is a force?
Element vs. compound: Give one clear difference between them.
What is elements have one type of atom; compounds have bonded different atoms?
What are substances you start with vs. end with in a reaction. (2 piece answer)
What are reactants and products?
In a solution like sugar water, this is the substance that gets dissolved, and this is the liquid that does the dissolving. (Give the answer to both)
What is the solute and the solvent?
A step in the Scientific Method that is a testable prediction you can investigate.
What is a hypothesis?
The resistance of an object to a change in its state of motion.
What is Inertia?
Atomic number vs. Mass number: What do each count?
What is Atomic number counts protons; and Mass number counts protons and neutrons?
Balance: Fe + O2 → Fe2O3
What is 4Fe + 3O2 → 2Fe2O3?
True or False: “Stirring longer raises the maximum amount that can dissolve at room temperature.” Explain.
What is false. Stirring speeds dissolving but doesn’t change the maximum; temperature sets the max.
The information is collected during an experiment.
What is data?
DAILY DOUBLE 600 if Correct
State Newton's Three Laws of Motion
Newton's First Law: An object at rest stays at rest, and an object in motion stays in motion unless a net force acts on it.
Newton’s Second Law: An object at rest stays at rest, and an object in motion stays in motion unless a net force acts on it.
Newton’s Third Law: For every action, there is an equal and opposite reaction.
Signs of this change can include a new smell, a permanent color change, or the release of heat and light.
What is a Chemical Change?
Identify the reaction type: AgNO3 + NaCl → AgCl + NaNO3.
What is double replacement?
Match each word to its meaning: unsaturated, saturated, supersaturated.
A. At the max amount that can dissolve.
B. More than the max; extra comes out.
C. Can still dissolve more.
What is
unsaturated → C
saturated → A
supersaturated → B
The claim you make after analyzing your results.
What is a conclusion?
If you double the net force on the same mass, this happens to acceleration.
What is it doubles? (a = F/m)
Which has greater density: 50g in 5cm³ or 50g in 10 cm³. Make sure you remember how you calculate.
What is 10 g/cm³ vs 5 g/cm³; the 5 cm³ sample is denser.
Why can’t you change subscripts to balance, and what should you change instead? (2 Part question)
What is subscripts change the substance; change coefficients only?
If a solution is supersaturated, what might you see?
What is crystals forming or gas bubbling out.
What is the structured 6-step process scientists use.
What is the Scientific Method
The quantity of motion an object has, dependent on mass and velocity.
What is momentum?
Give an example that could trick you to think it could be a physical or chemical change.
What is dissolving salt or sugar? (The salt or sugar doesn't go away)
DAILY DOUBLE (You pick the point value)
Balance the combustion: C3H8 + O2 → CO2 + H2O
What is C3H8 + 5O2 → 3CO2 + 4H2O
At room temp, max is about 36g salt per 100mL. Your mix has 40g per 100mL. Classify the solution and predict what you’ll see after it sits. (2 part answer)
What is supersaturated; undissolved salt appears or crystals form until it returns to the max.