I.
Scientific
Inquiry and Data
A. Hypothesis – what is it?
B. What are variables in an experiment?
C. What is a manipulated/independent
variable?
D. What is a controlled experiment?
E. Why is it important that an experiment be controlled?
F. What is the responding variable in an
experiment?
G. What are Qualitative and Quantitative
Data?
H. Why is data important when writing
conclusions?
II.
Measurement
A. Metric Unit of Length is a meter
B. Weight is a measure of force (your weight
is a force on the Earth). The
units are pounds and Newtons.
C. Weight is determined by mass and gravity.
D. Mass is the amount of matter in an
object. Mass is measured in grams
on a balance.
E. Volume is the amount of space something
takes up.
F. Volume of a regular object (length x width
x height) cm3
G. Volume of an irregular object (water
displacement) milliliters
H. Read a graduated cylinder at the bottom of
the meniscus (curvature)
III.
Density
and Buoyancy
A. Density is the amount of mass in a given
space.
B. Density = mass ÷ volume
C. Units are g/ml or g/cm3
D. Lots of stuff in a space means high
density
E. Density is a physical property. It doesn’t matter how much of a
substance you have, density stays the same.
F. When you layer liquids and objects. The denser objects go to the bottom.
G. The density of water is 1.0 g/ml. Anything denser than 1 g/ml will
sink. Anything less dense will
float.
H. Buoyancy is the ability to float. All fluids exert an UPWARD force called
a buoyant force.
I. Buoyant force acts opposite to gravity and
weight.
J. Archimedes’ Principle: Buoyant force acting on an object is
equal to the weight of the object if the object floats. If an object floats, it is displacing
its weight in water.
