1. Starter Question Write the following numbers in scientific notationkm
Write the following number in ordinary notation
5.78x104g
4.23x10-2s
Convert the following
752nm to cm
56.4kg to μg

2. Express the following quantities in scientific notation
300.8kg km cm
3.008x102kg
x10-2km
x108cm

3. Convert the following as indicated.
155mg to g
584µs to s
24g to pg
0.155g
5.84x10-4s
2.4x1013pg

4. How many minutes are there in 5 days?

5. A car is travelling at 118km/h. what is its speed in Mm/h

6. Write the answers in scientific notationg km
5.832x10-3
5.8x10-4

7. Significant Figures
The significant figures of a number are those digits that carry meaning, contributing to its precision.
The exceptions are;
Leading and trailing zeros eg
both these numbers have 2 sig. figs.
Spurious digits introduced by calculations
E.g x0.35=

8. Significant Figures
How many significant figures are in each of the following? 12
1098
2001
2.001x103
1.01x10-5
1000

9. Graphs There are 3 types of graph you need to know about Pie Charts
This is used to show numerical portion
Bar charts
This is often used to show how a quantity varies with factors; location or colour. It is used for discontinous data

10. Line graph
This is used to show continuous data such as how the temperature of a system changes over time

11. Now get into groups of two or three.
You will need to make sure that at least one person in each group has a cell phone or device that can go on the internet.
If not use one of the classroom computers
Either a) go to the app store and download the socrative app
b) Type socrative.com/student into the address bar.
The room number is

12. Exit ticket Write the number of sig. figs. for each problem 5.6857
19900