Mr. Murduck’s Homework/Practice 9/15 – 9/19
Monday – Science –Last week we discussed how the volume of the Great Lakes
was not only determined by the size of the lake, but also by the depth. This
makes sense because when we have two containers of equal diameter, the deeper
one will hold more liquid. Today we will begin by first discussing metric
measurement using graduated cylinders to measure the volume of a liquid. In
order to measure the volume properly you must learn how to look at the
meniscus of the container you are using. Make sure to pay attention in
class! Then to measure the volume of a solid we can drop an object into a
known amount of liquid and record how much liquid moves up or is displaced.
Companies need to know how much volume a container has. But they also need
to know how much room the objects take up that go in the container. Example:
A jar of pickles. Tomorrow you will be using graduated cylinders to measure
the volume of solid objects. Homework - Grade printouts were sent home
today! These need to be signed and returned to me by Friday of every week!
A small grade will be assigned to this task! These are used by me as a
communication tool home. Parents are encouraged to make notes to me if they
would like a telephone call regarding a question relating to student grades
or other issues. If a student fails to get grade printouts signed 2 weeks in
a row, in most cases I will make a telephone call home. Journal #6 - Reflect
on today’s discussion where I explained how to measure the volume of a liquid
or object using a graduated cylinder. (A) How do scientists make sure that
the data they collect and their measurements are accurate? (B) List the steps
that you are going to take as you determine the volume of different objects
during tomorrow’s lab. Optional – (C) Explain why we can only measure the
volume of objects that are heavier or denser than water.
Tuesday – Science - We will discuss last night’s homework while quickly
reviewing for today’s lab. Today we will measure the metric volume of solid
objects using the graduated cylinder. Each student will be responsible for
collecting data. Homework – Find 6 items at home that are measured by their
metric mass in grams (g), milligrams (mg), or kilograms (kg). List the item
and then write the metric mass of the item. Make sure not to use pounds or
ounces! Look for items like cereal, rice, sugar, etc. Remember to get you
grade printouts signed and returned to me by Friday!
Wednesday – Science – Today we will discuss yesterday’s lab. We will look at
last night's homework relating to the measurement of mass. Mass if different
than weight and is determined by the amount of matter that makes up an
object. Weight is determined by the gravitational pull being exerted on an
object. Mass is also determined by how compact the molecules of matter are.
This is called the density. Objects with molecules more compact than water
are denser than water and sink. I will introduce everyone to the triple-beam
balance and the electronic balance which measure the mass of objects. Some
round objects have to be placed in another object to record their mass. The
mass of the object they are placed in is subtracted from the total mass.
Homework – Journal #7 – You learned about the 3 states of matter in
elementary school. These are solids, liquids, and gases. (A) Considering
how compact the molecules are in each state of matter , why would solids tend
to be heavier than liquids? (B) Why would liquids tend to be heavier than
gases? Optional - (C) Given what we have discussed about the mass of
solids, liquids, and gases, explain what happens to allow a hot air balloon
to get it off of the ground. Swine Creek permission slips are due tomorrow!
Thursday – Science – Today we will discuss last night’s homework and
yesterday’s demonstration on how to use a triple-beam balance. Today we will
measure the mass/weight of objects on the triple-beam balance. We will then
compare our data from the triple-beam balance to what we record using an
electronic balance. Each student will be responsible for collecting data.
Homework – Grade printouts are due signed and returned by tomorrow! Read the
handout on density and be prepared to discuss it tomorrow in class. Note:
Reading assignments can always be followed with a pop quiz!
Friday – Science – Today we will discuss last night’s handout on density. We
will watch a short video on states of matter and density. Homework – Have a
safe and fun weekend!