Introduction to Biology

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Chapter 1 – Introduction to Biology
List of PEKA experiments:
Conducting an experiment to study the fitness level of students Making bread using yeast in the absence and the presence of sugar Number| Activity 1.1 (Experiment)|
Pg.| 1|
Title| Conducting an experiment to study the fitness level of students| Aim / Objective of the Study| To study the fitness level of students / To determine cardiovascular fitness by measuring a person’s pulse rate before and after a given period of vigorous exercise| Problem Statement| How does the fitness level of students affect the time taken for pulse rate to return to normal?| Hypothesis| The fitter the student, the shorter the recovery time| Variables| Manipulated variable: Students with different fitness levelsResponding variable: Time taken for pulse rate to return to normal (recovery time)Fixed variable: Gender and size of students, number of steps per minute, time for exercise| Material| -|

Apparatus| A bench of 30 cm in heightStopwatch|
Technique used| (The step test) Measure and record the time taken for the student’s pulse rate to return to normal|

BIOLOGY FORM 4 PRACTICAL EXPERIMENT 1 PAGE ( 1,2 3)
1.PROBLEM STATEMENT
How Is the fitness of students being determined.
2.HYPOTHESIS
The student who is the fittest has short time.
3.VARIABLES
MANIPULATED=TYPE OF STUDENTS
RESPONDING=NUMBER OF BEATS.
FIXED=TIME TAKEN
4.APPARATUS-IS THE STOOL NOT BENCH..
5TECHNIQUE
MEASURE AND RECORD USING STOPWATCH.
6.PROCEDURE AS STATED.
ONLY NUMBER ONE MUST CHANGE
COUNT AND RECORD THE PULSE RATE AT ONE MINUTE.
7.TABLE
JUST DRAW AND VEGNESH WILL POST THE TABLE BY MONDAY WHICH IS RESULT BCOZ HE IS HOLDING THE RESULTS PAPER. 8.DISCUSSION
VEGNESH PLEZ POST ANSWERS ALL THIS OK BCOZ U ARE THE ONE WHO KNOWS WELL ABOT THE ANSWERS

PLEASE DO THIS AND FOR VEGNESH PORTION ASK HIM TO PUT THE ANSWERS...
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