Bio122 Lab 1.docx
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CHM131 AS1201A PREPARED BY
NUR FATIHAH MAISARAH BINTI SALTO @ SUHARTO (2019502607)
EXPERIMENT NO. TITLE LAB PARTNERS’ NAMES
2 MEASUREMENT
1. LEVANA DEMELZA ANAK DOMINGO (2019562149) 2. NORAZISAH BINTI SAHARUDDIN (2019948951) 3. NURUL ASMIEDA BT HELMI
(2019130117) LECTURER’S NAME
MDM HANITA
DATE PERFORMED
22 MARCH 2019
DATE SUBMITTED
26 MARCH 2019
CHM131 AS1201A PREPARED BY
NUR FATIHAH MAISARAH BINTI SALTO @ SUHARTO (2019502607)
EXPERIMENT NO. TITLE LAB PARTNERS’ NAMES
1 THE SCIENTIFIC METHOD
4. LEVANA DEMELZA ANAK DOMINGO (2019562149) 5. NORAZISAH BINTI SAHARUDDIN (2019948951) 6. NURUL ASMIEDA BT HELMI
(2019130117) LECTURER’S NAME
MDM HANITA
DATE PERFORMED
22 MARCH 2019
DATE SUBMITTED
26 MARCH 2019
EXPERIMENT 1 : THE SCIENTIFIC METHOD
POST-LAB QUESTIONS
1. Describe how you carried out the experiments for Observation 1 and 2. Observation 1: Set a stopwatch before the experiment started. A lab partner started to held their breath then started the stopwatch. Stopped the stopwatch when they cannot held their breath. Recorded the observation. Repeated the experiment by exercising before starting the experiment.
2. Explain the following terms. a) Independent variables
A variable that is systematically changed in an experiment
b) Dependent variables
A variable which is the effect of out come that is measured in an experiment.
c) Controlled variables
A variable that are kept constant or controlled at set levels
3. Are the hypotheses for Experiment 1 and 2 accepted? If not, state the reason(s).
The hypotheses for Observation 1 is accepted.
EXPERIMENT 2: MEASUREMENT
POST-LAB QUESTIONS
LENGTH 1. According to Table 2.1, a) 1µm = 0.001 mm and 1nm = 0.001 µm b) Therefore, 1 mm = 1000 µm = 1000000 nm
2. Based on Table 2.1, complete the following conversions. a) 1.5 mm
=
1500
µm
b) 1000 nm
=
1
µm
c) O.25 mm
=
250
µm
d) 1500 µm
=
1.5
mm
e) 55 nm
=
0.055
µm
f)
=
75000
nm
75 µm
3. Based on your understanding, complete the following conversions. a) 1.5 cm = 15 mm = 15000 µm b) 5000 nm = 5 µm = 0.005 mm = 0.0005 cm
4. How many centimetres equivalent to one meter?
There are 1000 cm equivalent to 1 m.
5. How many millimetres equivalent to one metre?
There are 10000 millimetres equivalent to 1 m.
6. What does the prefix milli mean?
Prefix milli means one-thousandth (1/1,000 or 10-3).
TEMPERATURE 1. Fill in the blanks. a) Water freezes at either 34 ℉ or 0 ̊ ℃. b) Water boils at either 212 ℉ or 100 ℃.
2. 70 ̊F is equivalent to 21.1 degree Celcius ( ̊ C).
3. Record the surrounding temperatures inside the lab. a) Room temperature
=
31.0 ℃
=
81.1 ℉
b) Tap water
=
24.0 ℃
=
75.2 ℉
c) Hot water
=
77.0 ℃
=
170.6 ℉
d) Iced water
=
2.0 ℃
=
35.6 ℉
WEIGHT 1. 1 g equals to 1000 mg. Therefore,
2g
=
2000mg
0.2 g
=
200 mg
2 mg
=
0.0002 g
The weight of a the wooden block is 40.0 g 200 mg.
VOLUME 1. Complete the following equation. 1L = 1000 ml 2. Measure the wooden block (used in the weighing experiment) along its edges with a ruler to get its length, width and depth. Length
= 4.4 cm
Width
=
4.6 cm
Depth
=
2.9 cm
Therefore, the volume (space occupied by the wooden block) is 58.7 cm³.
If we assume 1 cubic centimetre (cm³) equals to 1 ml. Therefore the wooden block has a volume of 58.7 ml.
3. By using a ruler, briefly explain how you estimate the total volume of the test tube? What is the total volume of the test tube?
Measure the length of the test tube from top to bottom using a ruler. Measure the diameter of the test tube and divide the result. The total volume of test tube then be calculates using the formula for the volume of cylinder and the formula of hemisphere.
Length
= 14 cm
Diameter
= 2.3 cm
Radius
= 1.2 cm
Height of cylinder
= 14 - 1 = 13 cm
Volume of cylinder
= π r 2h 22 = (1.2) 2 (13) 7
= 49.02 cm³
Height of hemisphere
= 1 cm
Volume of hemisphere
1 4 = π r 3 2 3
= 3.62 cm³
The total volume of test tube = 49.02 + 3.62 = 52.64 cm³
4. Determine how many drops of water from a dropper equivalent to 1 ml. Estimate the volume for one drop of water.
1 ml = 30 drops of water 1 drop of water = 0.03 ml
5. Fill a 50 ml graduated cylinder to about 20 ml mark with water. Based on your understanding, briefly explain how to calculate the average volume for one marble.
Insert 5 marbles into the graduated cylinder. Record the reading. Minus the total volume of water with 5 marbles to the initial reading of water to get the volume of 5 marbles. Then, divide it t 5 to get the average volume of one marble.
6. What is the average volume for one marble used in this experiment?
Volume of water filled with 5 marbles = 31 ml
Volume of 5 marbles = 31 ml - 20 ml = 11 ml Average volume of 1 marble =
11 ml = 2.2 ml 5
NUR FATIHAH MAISARAH BINTI SALTO @ SUHARTO (2019502607)
EXPERIMENT NO. TITLE LAB PARTNERS’ NAMES
2 MEASUREMENT
1. LEVANA DEMELZA ANAK DOMINGO (2019562149) 2. NORAZISAH BINTI SAHARUDDIN (2019948951) 3. NURUL ASMIEDA BT HELMI
(2019130117) LECTURER’S NAME
MDM HANITA
DATE PERFORMED
22 MARCH 2019
DATE SUBMITTED
26 MARCH 2019
CHM131 AS1201A PREPARED BY
NUR FATIHAH MAISARAH BINTI SALTO @ SUHARTO (2019502607)
EXPERIMENT NO. TITLE LAB PARTNERS’ NAMES
1 THE SCIENTIFIC METHOD
4. LEVANA DEMELZA ANAK DOMINGO (2019562149) 5. NORAZISAH BINTI SAHARUDDIN (2019948951) 6. NURUL ASMIEDA BT HELMI
(2019130117) LECTURER’S NAME
MDM HANITA
DATE PERFORMED
22 MARCH 2019
DATE SUBMITTED
26 MARCH 2019
EXPERIMENT 1 : THE SCIENTIFIC METHOD
POST-LAB QUESTIONS
1. Describe how you carried out the experiments for Observation 1 and 2. Observation 1: Set a stopwatch before the experiment started. A lab partner started to held their breath then started the stopwatch. Stopped the stopwatch when they cannot held their breath. Recorded the observation. Repeated the experiment by exercising before starting the experiment.
2. Explain the following terms. a) Independent variables
A variable that is systematically changed in an experiment
b) Dependent variables
A variable which is the effect of out come that is measured in an experiment.
c) Controlled variables
A variable that are kept constant or controlled at set levels
3. Are the hypotheses for Experiment 1 and 2 accepted? If not, state the reason(s).
The hypotheses for Observation 1 is accepted.
EXPERIMENT 2: MEASUREMENT
POST-LAB QUESTIONS
LENGTH 1. According to Table 2.1, a) 1µm = 0.001 mm and 1nm = 0.001 µm b) Therefore, 1 mm = 1000 µm = 1000000 nm
2. Based on Table 2.1, complete the following conversions. a) 1.5 mm
=
1500
µm
b) 1000 nm
=
1
µm
c) O.25 mm
=
250
µm
d) 1500 µm
=
1.5
mm
e) 55 nm
=
0.055
µm
f)
=
75000
nm
75 µm
3. Based on your understanding, complete the following conversions. a) 1.5 cm = 15 mm = 15000 µm b) 5000 nm = 5 µm = 0.005 mm = 0.0005 cm
4. How many centimetres equivalent to one meter?
There are 1000 cm equivalent to 1 m.
5. How many millimetres equivalent to one metre?
There are 10000 millimetres equivalent to 1 m.
6. What does the prefix milli mean?
Prefix milli means one-thousandth (1/1,000 or 10-3).
TEMPERATURE 1. Fill in the blanks. a) Water freezes at either 34 ℉ or 0 ̊ ℃. b) Water boils at either 212 ℉ or 100 ℃.
2. 70 ̊F is equivalent to 21.1 degree Celcius ( ̊ C).
3. Record the surrounding temperatures inside the lab. a) Room temperature
=
31.0 ℃
=
81.1 ℉
b) Tap water
=
24.0 ℃
=
75.2 ℉
c) Hot water
=
77.0 ℃
=
170.6 ℉
d) Iced water
=
2.0 ℃
=
35.6 ℉
WEIGHT 1. 1 g equals to 1000 mg. Therefore,
2g
=
2000mg
0.2 g
=
200 mg
2 mg
=
0.0002 g
The weight of a the wooden block is 40.0 g 200 mg.
VOLUME 1. Complete the following equation. 1L = 1000 ml 2. Measure the wooden block (used in the weighing experiment) along its edges with a ruler to get its length, width and depth. Length
= 4.4 cm
Width
=
4.6 cm
Depth
=
2.9 cm
Therefore, the volume (space occupied by the wooden block) is 58.7 cm³.
If we assume 1 cubic centimetre (cm³) equals to 1 ml. Therefore the wooden block has a volume of 58.7 ml.
3. By using a ruler, briefly explain how you estimate the total volume of the test tube? What is the total volume of the test tube?
Measure the length of the test tube from top to bottom using a ruler. Measure the diameter of the test tube and divide the result. The total volume of test tube then be calculates using the formula for the volume of cylinder and the formula of hemisphere.
Length
= 14 cm
Diameter
= 2.3 cm
Radius
= 1.2 cm
Height of cylinder
= 14 - 1 = 13 cm
Volume of cylinder
= π r 2h 22 = (1.2) 2 (13) 7
= 49.02 cm³
Height of hemisphere
= 1 cm
Volume of hemisphere
1 4 = π r 3 2 3
= 3.62 cm³
The total volume of test tube = 49.02 + 3.62 = 52.64 cm³
4. Determine how many drops of water from a dropper equivalent to 1 ml. Estimate the volume for one drop of water.
1 ml = 30 drops of water 1 drop of water = 0.03 ml
5. Fill a 50 ml graduated cylinder to about 20 ml mark with water. Based on your understanding, briefly explain how to calculate the average volume for one marble.
Insert 5 marbles into the graduated cylinder. Record the reading. Minus the total volume of water with 5 marbles to the initial reading of water to get the volume of 5 marbles. Then, divide it t 5 to get the average volume of one marble.
6. What is the average volume for one marble used in this experiment?
Volume of water filled with 5 marbles = 31 ml
Volume of 5 marbles = 31 ml - 20 ml = 11 ml Average volume of 1 marble =
11 ml = 2.2 ml 5
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