Experimental design
What is the variable we keep the same throughout the experiment?
control variable
What is length?
How long something is from end to end
What is the SI basic unit of length?
What tool(s) do we use to measure length?
What is the formula for density?
Mass divided by volume
Dependent variable
What is mass?
How much matter something has
What is the SI basic unit of mass?
Grams (g)
What tool(s) do we use to measure mass?
electric balance, triple beam balance
What are the two ways to measure volume of a solid?
Displacement and formula
What is the variable we change to see the effect of it?
What is Volume?
How much space something takes up
What is the SI basic unit of Volume?
Liters (L)
What tool(s) do we use to measure volume?
graduated cylinder, pipette, flask, beaker
What is displacement?
Placing an object in a known volume of water and seeing how the volume changes
A chef wonders if the temperature of water changes how quickly sugar crystals disappear when stirred. what is the independent variable?
temperature of water
What is density?
Amount of mass per unit of volume
What is the SI basic units of density?
g/mL or g/m3
What tool do we use to measure weight?
Scale
How are mass and weight different?
Mass is the same no matter where you go in the universe
Weight changes with gravity
Scientists are testing whether using red, blue, or green light in a greenhouse affects how tall bean plants get.
What is the independent variable and the dependent variable?
Independent: color
Dependent: how tall the plants get
What is weight?
The force of gravity on an object
What is the SI basic unit of temperature?
Kelvin
What tool do we use to measure temperature?
Thermometer
You have two rocks: Rock A has a mass of 45g and volume of 15 mL and Rock B has a mass of 60g and a volume of 30 mL. Which rock has a greater density?
Rock A