January 27, 2016
Scientific Notation
1) Students will write numbers in scientific notation.
2) Students will write numbers in standard form.
Lesson objectives
Teachers' notes
January 27, 2016
Teacher: Melissa Spears
Subject: PreAlgebra
Topic: Scientific Notation
Grade(s): 6 - 8
Cross-curricular link(s): Hubble Telescope
Lesson notes:
Type text here
Lesson objectives
Teachers' notes
January 27, 2016
Make a guess and write it down
on a piece of paper.
Pull
Hint
How far do you think the planet
Pluto is from the sun?
Ea
93,0
fro
January 27, 2016
Touch
to
reveal
Want to change
your guess???
Write this number down 15
times on your paper.
ClickKidding!
to reveal
Just
Pull
Answer
Pluto is about 39 times as far
from the Sun as Earth is.
Pl
3,64
miles
January 27, 2016
Pull
- Scientists study these big
numbers all the time.
- They don't like writing big
numbers either!
- So, they use ...
Click to Notation
reveal
Scientific
The 8 million
dollar mistake
Ima
it
ma
January 27, 2016
(Write this down!!!)
Scientific Notation - a shorter way to write a
big number
a x 10
a is a number
between 1 and 10
n
n tells how many
places you moved
the decimal
January 27, 2016
(write everything on this page down)
Write each number using scientific notation.
3,647,000,000
right now, the
decimal is here
Move the decimal to form a number
between 1 and 10
3,647,000,000
*move 9 places to the left
*forms the number
1 and 10
3.647 which is between
9
Click
to
reveal
3.647 x 10
January 27, 2016
Write using scientific notation.
56,000,000,000,000
13
Click
5.6to xreveal
10answer
January 27, 2016
Write using scientific notation.
2,305,000,000,000
12
Click
to
reveal
answer
2.305 x 10
January 27, 2016
Scientists also use scientific notation for
really, really, small numbers.
*Still need to move the decimal to form a
number between 1 and 10
(Write the rest of this page down)
Write in scientific notation.
.00000173
.00000173
6 places to the right
-6
Click
1.73tox reveal
10
*Exponent is negative when decimal moves
to the right, or original number is smaller
January 27, 2016
Write in scientific notation.
.000000502
-7
Click
to
reveal
5.02 x 10
January 27, 2016
Can you work backwards???
Write in standard form.
3.78 x 10
6
positive exponent will make
number get bigger
000
3.78 0slide
Click to reveal
3,780,000
move decimal
right 6 places
January 27, 2016
Write in standard form.
1.0654 x 10
-7
number will get smaller
since exponent is negative
0 0 0 0 1.0654
0 0Slide
Click to reveal
.00000010654
move 7 places
to the left
January 27, 2016
Test Practice
Complete the following problems in your book and turn them in before leaving today:
pg. 494 Set D 1-­‐31 odd