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Aug 19, 2014

Activity No. _____ Date: ______________ Activity Title: Prefixes in Units of Large and Small Measurements Learning Target: To decode the meaning of prefixes used in large and small measurements.

Prefix in SI Units exa peta tera giga mega kilo hecto deka deci centi milli micro nano pico femto atto

Symbol E P T G M K h da d c m n p f a

Meaning 1, 000,000, 000, 000, 000, 000 1, 000,000, 000, 000, 000 1, 000,000, 000, 000 1, 000,000, 000 1, 000,000 1, 000 100 10 1 0.1 0.01 0.001 0.000001 0.000000001 0.000000000001 0.000000000000001 0.000000000000000001

Exponential 1018 1015 1012 109 106 103 102 101 100 10-1 10-2 10-3 10-6 10-9 10-12 10-15 10-18

Exercises: 1. How many meters (m) are there in one megameter (Mm)?

2. How many picoseconds (ps) are there in one second (s)?

Activity No. _____ Activity Title: Scientific Notation Learning Targets: A. To write numbers using scientific notation. B. To explain why scientific notation is used.

Date: ______________

Consider the distance that light travels in one second. This is about 299800000 meters. For scientists and students, writing numbers in this way can be a waste of time, energy, ink, and paper. Therefore, for very large and very small numbers, we use what is now called as Scientific Notation. We take the example above. Since 299800000 = 2.998 x 100, 000, 000 We have the standard scientific notation, 299800000 = 2.998 x 108 . This is read as, Two point nine-nine-eight times ten to the power eight. We see that a number in scientific notation has two parts: the number with a decimal point after the first digit, and a power of ten. Exercise: Write the following numbers in scientific notation. a. 3450000 = ______________________ b. 70680000 = _____________________ For numbers less than one or very small numbers, the power or exponent of ten becomes Negative. Since, for example, 0. 050 = 5 = 5 100 102 We have the scientific notation, 0.050 = 5.0 x 10-2 Exercise: Write 0.00000036 in scientific notation. _____________________________.

Activity No. _____ Date: ______________ Activity Title: Branches of Physics Learning Targets: A. To define each branch of physics. B. To classify the branches into classical and modern physics using any graphic organizer EE: Everything is connected to everything else Physics is divided into two main branches, the classical and the modern physics. Classical physics refers to the traditional topics in physics that were recognized and developed before the beginning of the 29th century. Modern physics on the other hand, refers to concepts in physics that have surfaced since the beginning of the 20th century, concerning mostly with the behavior of matter and energy under extreme conditions ( The very large and the very small ) Exercises: Classify the branches of physics using a network tree. Then, give one example under each branch of physics. Examples: Dynamics - flight of birds in air Astrophysics what keep stars and other heavenly bodies suspended in the sky.

Activity No. _____ Date: ______________ Activity Title: Physicists and Their Contributions Learning Targets: A.To list the names of some physicists and their contributions to physics. To identify the impact of the contributions/ inventions of at least three physicists to society.

There are several man and woman who contributed in the field of physics. Some were listed/recognized while others were not. Our native, Badjao, is considered physicists in their simplest way of life. The building of the boat and its parts to make it sail fast even if theres air resistance is really an application of some physical laws and principles. Exercises: 1. List down the names of some physicists and their contributions. 2. Choose three physicists and identify the impact of their contributions /inventions to the society.

Activity No. _____ Date: ______________ Activity Title: Fundamental and Derived Quantities Learning Targets: A. To differentiate fundamental from derived quantities. B. To distinguish fundamental from derived quantities. EE : Everything Changes In physics, most of the time were dealing with numbers. Thus, measurement always plays an important role in physics. Quantities could either be fundamental or derived quantities. Exercises: 1. How are fundamental quantities different from derived quantities?

2. List down at least seven fundamental and derived quantities and give their units. Fundamental Quantities 1. 2. 3. 4. 5. 6. 7. Derived Quantities 1. 2. 3. 4. 5. 6. 7. Units

Units

3. Is knowledge on quantities important to our daily lives? Why?

Activity No. _____ Date: ______________ Activity Title: Metric System and Units Learning Targets: A. To answer the crossword puzzle on metric system and units. B. To identify the term/s described on measurements. People developed units of measurement based on body parts of the human body to facilitate communication. The use of standard units of measure can be traced back to ancient times. Ancient people used objects such as ropes, stones and sticks to measure other objects. They also created units based on body parts. However, body parts may vary from one person to another. Hence, people would give different measurements for the same length using the same unit. To eliminate such confusion, an International convention agreed to use standard units like meter. Thus, the metric system is used for a more convenient and accurate standard unit of measurement. Exercise: Answer the crossword puzzle.1 4 6 5 2 3

7

8

9

10 11 12

13

14

15 16 17

Across: 2.the amount of matter in an object. 6.quantity that is not derived 7.the stuff that everything is made of

Down: 1. The amount of space an object takes up 3. Quantity that has magnitude only 4. The resistance of an of an object to change its state of motion. 9.unit of electric current 5.quantity that has both magnitude and direction 11.prefix for a million 8.SI unit of temperature 13.unit to measure time 10.Mass over volume 15.unit to measure mass 12.standard unit of distance 16.everything is made up of matter and ___ 14.prefix for a hundredth 17.prefix for a thousand 15.prefix for 1000

Activity No. _____ Activity Title: Types and Parts of a Wave

Date: ______________

Learning Targets: A. Define waves operationally; identify the different types of waves. B. Draw and describe the different parts of a wave. EE: Nature is beautiful and we are stewards of Gods creation Exercises: Directions: Read your physics textbook on pp. 189-191. Answer the following questions.

1. What is a wave?

2. What are the two types of waves?

3. Give examples under each type of wave.

4. Differentiate pulse wave from periodic waves

5. Give the 3 classification of waves and describe each

6. Draw a wave and label its parts

7. Differentiate a crest from a trough

8. Give the difference between a wavelength and an amplitude

9. State the difference between amplitude and crest

10. What can you say about the waves that travel along a string and move in the air?

Activity No. _____ Date: ______________ Activity Title: Characteristics of Waves Learning Targets: A. To solve problems on characteristics of waves. B. To compute for frequency, speed and wavelength. * Characteristics of Waves * 1. Period (T) - time taken to make one complete revolution or vibration. T = time/ no. of revolution. Unit: s 2. frequency (f) - the number of vibrations per unit of time of any particle, usually measured as no. of vibrations per second. As with any SHM, the frequency is inversely related to the period, that is f = 1/T or f = no. of vib./ time or no. of cycles/time. Its unit is /s or hertz (Hz). 3. Amplitude (A) - the maximum displacement of any particle like the wave, measured from its equilibrium or undisturbed position; It is expressed in m or cm. 4. Wavelength ( ) - the distance between two successive crest or two successive trough. It is also the product of the wave velocity and the time. To compute for the , = v.t , where is the wavelength, v = velocity and t = time. 5. Wave velocity ( v )- the velocity with which any of the phase of the motion ( crest, trough or compression ). It is propagated through the medium. It is the ratio of the wavelength to the time. V= / t. It is

expressed in m or cm. Sample Problems: 1. Suppose a wave with a length of 1 m has a frequency of 3s, what is the speed of the wave? Given: = 1m f = 3 Hz or /s v =? v = / t = 1m/3s = 0.33 m/s 0.33 m/s 2. What is the wavelength of radio waves if it has a velocity of 2 m/s and a frequency of 3 Hz? Given: v = 2m/s, f = 3 Hz, = ? = v.f = 2 m/s ( 3/s ) = 6m 3. A certain wave makes 10 revolutions in 2 seconds. Find the period of the wave. Solution: T = ? T = time / no. of rev. or cycle = 2s / 10 rev. = O.2 s

or v = f, since f = 1/T = 1/3s, then v = 1m ( 1/3s ) =

Exercises:Directions: Solve the following problems. Encircle your final answer 1. If a wave has a frequency of 1.5 Hz and a velocity of 3 m/s, what is the wavelength of the

wave?

2. Find the frequency of a wave that has a velocity of 15m/s and a wavelength of 3m.

3. What is the period of the wave while Aaron is surfing if the wave propels him toward the beach with a speed of 5 m/s and a wave crest is 2.0 m apart?

4. A ripple tank produces 18 vibrations in 3 seconds. a.) What is its frequency?

5. Waves with frequency of 2 Hz are generated along a spring. The waves have a wavelength of 0.45m.a.) What is the speed of the wave along the spring? b.) What is the wavelength of the waves along the spring if their frequency is increased to 6 Hz? c.) If the frequency is decreased to 0.5 Hz, what is the wavelength?

6. Ocean waves are hitting a beach at a rate of 2 Hz. The

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