Measuring
What units do you measure temperature in?
Degrees C
What is an independent variable?
One you change
What is the independent and dependent variable:
If we increase the height of the ramp, the toy car will increase in speed
Independent - height of the ramp
Dependent - speed of the toy car
What is the best way to separate sand from water?
Filtration
RANDOM RIDDLE:
If you throw a black rock in the Red Sea, what does it become?
wet
What is a controlled experiment?
an experiment in which one variable is changed and all other variables are kept the same
What is the independent and dependent variable:
If you increase the temperature on the water, the salt will dissolve faster
Independent - Temperature of the water (degrees C)
Dependent - How fast the salt dissolves (seconds)
What would we use to separate salt and water?
Evaporation OR distillation
What units do you measure volume in?
L, ml
What is a dependent variable?
the variable that you measure
What is the independent and dependent variable:
If a plant receives more sunlight, it will grow taller
Independent - How much sunlight a plant gets
Dependent - how tall the plant grows (cm)
How could we separate rubber ducks from water?
Flotation
What units do you measure mass in?
mg, g, kg
RANDOM RIDDLE:
What is the quickest way to double your money?
What is the independent and dependent variable:
If more baking soda is added to vinegar, then the reaction will produce more gas
Independent - the amount of baking soda (g)
Dependent - how much gas is produced (ml)
How could we separate pasta from water?
Sieve OR decantation
What units do you measure time in?
milliseconds, seconds, minutes, hours
What does doing multiple trials in an investigation help with?
makes the results more trustworthy and reliable
What is the independent and dependent variable:
Students who eat breakfast in the morning perform better on tests than students who don't.
Independent - Whether students eat breakfast or not
Dependent - the student scores on test
How could we separate copper sulfate from water, but collect both the copper sulfate and water?
Distillation