JAMB CBT PRACTICE TEST

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BIOLOGY LESSON NOTE ON HUMAN KIDNEY

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Lesson Note on the Human Kidney Topic: The Human Kidney Duration: 40 minutes Specific Objectives: By the end of the lesson, students should be able to: Define the kidney and state its location in the human body. Identify and describe the structure and functions of the kidney. Explain the processes involved in urine formation (filtration, reabsorption, and secretion). Describe how the kidney contributes to homeostasis. Identify common kidney-related diseases and how to prevent them. Evaluate the importance of maintaining kidney health. Lesson Content: 1. Introduction to the Human Kidney The kidneys are vital organs in the human body responsible for filtering waste from the blood and regulating water and electrolyte balance. They are part of the excretory system and play a crucial role in homeostasis. Location: The kidneys are located in the abdominal cavity, on either side of the spine, just below the rib cage. Each kidney is bean-shaped and about the size of a fi...
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BASIC SCIENCE LESSON NOTE (JSS1 FIRST TERM)

 Week 10: Measurement in Science (Length, Mass, Time)

Topic:

Basic Science Lesson Note on Measurement in Science: Length, Mass, and Time

Class:

JSS1 (Junior Secondary School 1)

Specific Objectives:

By the end of the lesson, students should be able to:

  1. Define measurement in science.
  2. Explain the meaning of length, mass, and time.
  3. Identify instruments used for measuring length, mass, and time.
  4. State the standard units of measurement.
  5. Perform simple measurement activities in daily life.
  6. Appreciate the importance of measurement in science and everyday activities.

Lesson Content:

1. Meaning of Measurement in Science

Measurement in science is the process of determining the size, quantity, or amount of an object or substance using standard units.

It helps scientists to get accurate and reliable results during experiments.

2. Measurement of Length

Meaning of Length

Length is the distance between two points or the measurement of how long an object is.

Instruments for Measuring Length:

  • Ruler
  • Tape measure
  • Meter rule
  • Measuring tape

Standard Unit of Length:

  • Metre (m)
  • Centimetre (cm)
  • Kilometre (km)

Examples:

  • Length of a desk
  • Height of a student
  • Distance between two locations

3. Measurement of Mass

Meaning of Mass

Mass is the amount of matter contained in an object.

Instruments for Measuring Mass:

  • Beam balance
  • Electronic weighing scale
  • Spring balance

Standard Unit of Mass:

  • Kilogram (kg)
  • Gram (g)

Examples:

  • Mass of a bag of rice
  • Mass of a student
  • Mass of fruits

4. Measurement of Time

Meaning of Time

Time is the period during which an event occurs or the duration of an activity.

Instruments for Measuring Time:

  • Clock
  • Wristwatch
  • Stopwatch

Standard Unit of Time:

  • Seconds (s)
  • Minutes (min)
  • Hours (h)

Examples:

  • Time taken to run 100 metres
  • Duration of a lesson
  • Time taken to cook food

5. Importance of Measurement in Science

Measurement is important because it:

  • Gives accurate results
  • Helps in scientific experiments
  • Makes comparison possible
  • Helps in construction and engineering
  • Improves daily activities like cooking and traveling

6. Real-Life Application of Measurement

  • Builders measure land before construction
  • Tailors measure clothes using tape
  • Doctors measure body weight and temperature
  • Athletes use time measurement in sports

Conclusion:

Measurement of length, mass, and time is very important in science and daily life. It helps us to understand the world better and perform tasks accurately. Without measurement, science experiments and daily activities would be unreliable.

Evaluation (Objective Questions):

  1. Measurement in science is the process of finding
    A. Colors
    B. Size or quantity
    C. Sound only
    D. Shapes only
    Answer: B

  2. The instrument used for measuring length is
    A. Thermometer
    B. Ruler
    C. Stopwatch
    D. Scale
    Answer: B

  3. The SI unit of length is
    A. Kilogram
    B. Metre
    C. Second
    D. Gram
    Answer: B

  4. Mass is the amount of
    A. Space
    B. Matter in an object
    C. Time
    D. Speed
    Answer: B

  5. The instrument used to measure mass is
    A. Clock
    B. Beam balance
    C. Ruler
    D. Thermometer
    Answer: B

  6. The SI unit of mass is
    A. Metre
    B. Gram
    C. Kilogram
    D. Second
    Answer: C

  7. Time is measured in
    A. Metres
    B. Kilograms
    C. Seconds
    D. Litres
    Answer: C

  8. A stopwatch is used to measure
    A. Length
    B. Mass
    C. Time
    D. Volume
    Answer: C

  9. One importance of measurement is
    A. Confusion
    B. Accuracy
    C. Noise
    D. Fighting
    Answer: B

  10. Which of these is NOT a unit of time?
    A. Second
    B. Minute
    C. Hour
    D. Kilogram
    Answer: D

Essay Questions:

  1. Define measurement in science.
  2. Explain length and state its units.
  3. What is mass? Mention two instruments used to measure it.
  4. Define time and give three examples of its use.
  5. State five importance of measurement in science.
  6. Mention three instruments used for measuring time.

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