1. Unit 3: K-2 Grade

2. What is a Combination Lock?
You can only open a
combination lock by
turning the dial in a
secret combination of
numbers that is hard to
guess.

3. Why do we use locks?
 Peopleuse locks to
keep their belongings
safe and protected

4. We lock….

5. SO…
WHAT IS A PASSWORD?

6. PASSWOR
D:
A secret word or
phrase that some
websites require you to
type in if you want to
visit them.

7. PASSWORDS…
are similar to the combinations for a lock.
are secret combinations of letters and numbers
that only you know.
keep other people from seeing your private
information on the Internet

9. Widescreen Test Pattern (16:9)
Aspect Ratio
Test
(Should appear
circular)
4x3
16x9