1. SCIENCE 8 TOPIC 3

2. What is an Event?

3. An event is a change or series of changes that are observed to take place.

4. An event can take the form of a change in a substance’s properties.

5. An event can take the form of a change in a complete system.

6. What are the two ways an event can be described?

7. First is a change that occurs over time in which the rate is important.
FAST
SLOW

8. Second is a change that occurs over space.

9. Be ready to give examples of events that occur at slow rates and at fast rates.

10. Can you tell the difference between independent and dependent variables?

11. FOUND ON THE “y” AXIS AND IS CHANGED BY OTHER FACTORS
FOUND ON THE “x” AXIS AND IS NOT CHANGED BY OTHER FACTORS

12. Some examples of independent and dependent variables:

13. What should the range of a variable be when drawing a graph?

14. How precise should you be when drawing a graph?

15. What is extrapolation of data?

16. Sunspots

17. What are direct and indirect (a.k.a. inverse) relationships?

18. Direct relationships are when variables change in the same manner.

19. Indirect relationships are when variables change in a different manner.

20. What is the difference between cyclic and random changes?

21. Which is cyclic…which is random?

22. What is the relationship between energy, events, and interfaces?

23. Energy is needed for an event to occur.

24. An event can only take place at an interface.

25. An interface can be well-defined (lake surface) or poorly defined (foggy area) .

26. What is environmental dynamic equilibrium?

27. Events take place on the earth all the time
Events take place on the earth all the time. Some hurt the earth (like oil spills) and some help the earth (rain cleaning out the air). The earth has the ability over time to keep itself balanced in order to sustain life.