The Scientific Method

• Scientific Method is a process of investigation where problems are identified and their explanations are tested by carrying out experiments.
• Observation : An unbiased, accurate report of an event.
• Hypothesis : An educated guess based on observations.
• Experiment : An experiment is designed to test a hypothesis.
• Data : Consists of measurements, observations/information gathered during an experiment.
• Replicate : A repeat of an experiment.
• Control : A comparison used to provide a standard against which the actual experiment can be judged.
• Theory : A hypothesis that has been supported by different experiments.
• Principle/Law : A theory that... (More)

EXPERIMENT QUESTIONS

1. (a) TEST FOR REDUCING SUGAR:

FOOD SOURCE: Glucose (monosaccharide)

CHEMICAL USED: Benedict’s solution (blue)

HEAT REQUIRED: Yes (thermostatically controlled water bath)

+ RESULT: Colour change BLUE to BRICK RED

- RESULT: No colour change (stays blue)

CONTROL: Water + Benedict’s (non-reducing sugar)

PURPOSE OF CONTROL: Acts as a comparison

1. (b) TEST FOR STARCH:

FOOD SOURCE: Potato/ Bread

CHEMICAL USED: Iodine (red/yellow), using a dropper due to small volume needed

HEAT REQUIRED: No

+ RESULT: Colour change RED/ YELLOW to BLUE/BLACK

- RESULT: No colour change (stays red/yellow)

CONTROL: Water and Iodine

1. (c) TEST FOR... (More)

There are 4 types of teeth.

1. Incisors- there are 8 incisors, 4 on the top and 4 on the bottom. They are sharp teeth at the front which cut food.
2. Canines- there are 4 canines, 2 on the top and 2 on the bottom. They are pointed teeth which tear the food.
3. Premolars- there are 8 premolars, 4 on the top and 4 on the bottom. They are large flat teeth which grind the food.
4. Molars- there are 12 molars, 6 on the top and 6 on the bottom. They are large flat teeth at the back of the mouth... (More)