Predicting and Forming a Hypothesis

HYPOTHESIS

A guess

假说 hipótesis

가설 Hipoteza

Questions 1,2,3,4

Observation Inference Independent variable (control)

Dependent variable (no control)

Hypothesis

(guess)

#1

#2

#3

Question 1

Observation inference hypothesis (guess)

O2

Dead Fish No oxygen in the water

If oxygen level increases, fish population will increase

O2

O2

O2Independent variable? (control)

Dependent variable?(no control)

Hypothesis

IF oxygen level increases THEN fish population will increase.

O2

Question 2

IF the cola contains sugar, THEN it will sink

The regular cola sinks

The diet cola floats

VariablesObservation

Independent variable (control):How much SUGAR in the cola

Dependent variable:(no control)distance the cola goes up

Hypothesis

Question 3

Plastic bag

Pencil

VariablesObservation Hypothesis

Variables

Observation

Hypothesis

Inference

There is water in the plastic bag

The pencil is sharp

The pencil breaks the

bag and the water pours

out

A GUESSIf there are MORE holes in the bag,

then MORE water will pour out.

Independent variable (control):Number of holes in

the bagDependent variable (no

control):How much water

pours out

Plastic bag

Pencil

Definition (words/pictures) Example

1. Observation

2. Inference

3. Independent Variable

4. Dependent Variable

5. Hypothesis

6. Graph

7. Chart

8. Length

9. Width

10. Control