I hope you’re all having a fantastic week so far!
A reminder about the upcoming science fair!
And we also have our annual book fair at the end of this month!
A few quick reminders:
· Tomorrow is a Day 3.
· Aftercare invoices for the month of October have come out and are due Friday, November 15th, 2019. Any questions can be directed to Ms. Chiappetta at echiappetta@stjudesacademy.com
· Curling permission forms and waiver forms were sent home last week and are due back Thursday, November 7th. This trip has no cost as it was already paid for in the athletic fees during registration.
Inquiry into Flight – Today, we began examining the four forces of flight. These are gravity, lift, thrust, and drag. These forces interact with our experiment from yesterday ‘Moving Faster (Thrust), Slower (Drag), Up (Lift), and Down (Gravity)’.
For a plane to fly, we must use thrust to gain speed, which will allow lift to be created. Students will complete an inquiry of their own tonight to examine this.
French – After this, we had French with Mme. Stella, which you can read about on her blog (https://stjudesfrench-stella.blogspot.com).
Inquiry into Language – Today, we continued looking at our OWA topic for term one which is fables and legends. Students were again put into pairs and given samples of fable/legend writing. Their goal was to read these, list the things done well and the areas of improvement, and to try and piece together what makes a good fable/legend. We are going to be putting all our ideas together tomorrow and continuing this inquiry.
Gym – After math, the students had gym with Mr. Orr, which you can read about on his blog (http://tysonorr.blogspot.com).
Inquiry into Math – During math, we took up the review from yesterday. A reminder that our test is tomorrow! Once again, if students are having trouble with any part of this unit, they NEED to come and seek assistance.
Lessons 3.1 & 3.2
To draw 2D representations of 3D shapes, we build the shapes and examine them from multiple perspectives (top, bottom, front, back, left, right).
To draw your 3D shapes, you first draw your vertical edges. Then, you draw all edges going diagonally to the right (upward). Then, you draw all your edges going diagonally to the left upward.
We also reviewed what makes a regular polyhedron. A regular polyhedron is one where all the faces are congruent, the same number of faces meet at each vertex, and the same number of edges meet at each vertex.
Lesson 3.3
Lesson 3.4
A variable is a letter (or symbol) that represents a quantity that can vary. For example, when we say ‘length times width’, the numbers aren’t always going to be the same. After this, we talked about area and perimeter. The perimeter of a shape is the measurement of the distance around that shape. The area is the space measure inside of a 2D shape. We measure perimeter in units as it is a linear measurement and area in units squared as it is a square measurement.
After this, we started to look at the ways we use variables in measurement formulas. We started by examining a square. A square is a shape with all four side measurements the same. We label this side with the variable ‘s’ for ‘side’. The perimeter is the distance around a shape. We write that P = s + s + s + s. Since this is repeated addition, we write P = 4 x s or P = 4s. For area, we write A = s x s or A = s2.
We use the same concept for rectangles, except rectangles use length (or base) and width (or height). For perimeter, we add all the sides together and write P = l + l + w + w, which can be written as P = 2l + 2w or P = 2(l + w). Note: You can use base and height in place of length and width. Either formula is correct. For area, we use A = l x w (or A = lw) or A = b x h (A = bh).
Let’s imagine we have a square with a side length of 6 cm.
P = 4s A = s2
P = 4(6) A = (6)2
P = 24 cm A = 36 cm2
Let’s imagine we have a rectangle with a length (base) of 5 cm and a width (height) of 4 cm.
P = 2(l + w) A = bh
P = 2(5 + 4) A = (5)(4)
P = 2(9) A = 20 cm2
P = 18 cm
Lesson 3.5
The surface area of an object is the total area of the surface of an object. This is a measurement of the area on the outside of a 3D object. When we are looking at surface area, we are using 3 different variables – length (how long is the object?), width (how wide is the object?), and height (how tall/high is the object?).
What happens when you unfold a 3D shape? You get a net (2D version). When we examined surface area last year, we learned that you can calculate the individual areas of each rectangle and then add them all together. This year, we looked more closely at our prism net. We identified all the measurements on our net.
We identified what numbers we would multiply in each rectangle to get the area. We took another step and identified what variables we needed to multiply to get each area. What we observes was that ‘lw’, ‘lh’, and ‘wh’ all occur twice in the prism.
Therefore, to calculate surface area, we add everything together…
SA = lw + lw + lh + lh + wh + wh
Since we are repeating addition in our formula, we multiply.
SA = 2lw + 2lh + 2wh
We can even go one step further and say that we are multiplying these measurements once each, adding them together, and then doubling them.
SA = 2(lw + lh + wh)
Let’s imagine we have a rectangular prism with a length of 5 cm, a width of 4 cm, and a height of 7 cm…
SA = 2(lw + lh + wh)
SA = 2 (5x4 + 5x7 + 4x7)
SA = 2(20 + 35 + 28)
SA = 2(83)
SA = 166 cm2
Lesson 3.6
Volume is defined as the amount of space occupied by an object. While we were looking at surface area, we talked about how surface area is the measurement of the area of each of the faces on the outside of the object. The volume is the measurement inside a 3D shape. Once again, you use 3 variables: length, width, and height.
Let’s imagine we have a rectangular prism with a length of 5 cm, a width of 4 cm, and a height of 7 cm…
A = lwh
A = (5)(4)(7)
A = (20)(7)
A = 140 cm3
Science Fair – At the end of the day, we worked on our cars for Science Fair. There are only 6 school days until the science fair! Students are encouraged to come earlier to school to work on their cars (I will be here for 7:30 each day). Students are also encouraged to use their recess times to complete their cars.
Homework:
- Study for math test tomorrow
- Complete 'The Four Forces of Flight' (due tomorrow)
We do our best to complete work in class. In the event this is not possible, it will go home for homework.
As always, please feel free to email me with any questions.
Mr. Conte
