1. Going Deeper into Scientific Inquiry

2. There are two types of observations:
Qualitative observations use your senses to observe the results. (Sight, smell, touch, taste and hear.)
Quantitative observations are made with instruments such as rulers, balances, graduated cylinders, beakers, and thermometers. These results are measurable.

3. Which is which- 1. quantitative or 2. qualitative
1. It is light green in color. ________ (1 or 2)
2. It taste sour. ______ (1 or 2)
3. One leaf is 9 cm long. ____ (1 or 2)
4. It makes a loud pop sound. ____ (1 or 2)
5. The mass of the computer is 1 1/2 kg. ____ (1 or 2)
6. It smells sweet. ____ (1 or 2)
7. The temperature of the room increases by 8 degrees C. ____ (1 or 2)
8. It gets darker over a period of time. ____ (1 or 2)
9. The flower clusters in 3 blooms. ____ (1 or 2)
10. Feels very rough. ____ (1 or 2)

4. There are three types of variables in ANY experiment!!!
The manipulated (independent ) variable is the factor intentionally changed by the scientist.
Ex-
Increase heat
Increase water

5. 2. The responding variable is the factor that is affected by the change planned by the scientist.
What is the manipulated and responding variables?
Temperature increases with added heat.
Plant grows faster with added water.
Different gasoline makes car go faster.

6. 3. The controlled variable is the group of factors that is NOT changed.
Nothing else should be changed,
so the scientist KNOWS his or her
change (manipulated variable) is what caused
the plant to get bigger
the frog to jump higher
the car to go faster
If more than one variable is changed, the results of the experiment are not considered valid (reliable, real, truthful).

7. Time to practice:
An experiment was performed to see if the amount of coffee grounds could affect the taste of the coffee. The same kind of coffee, same coffee maker, same amount of water and type of water were used. The coffee perked for the same amount of time and the same electrical outlet was used!
What is the manipulated variable?
What is the responding variable?
What is the controlled variable?