PENGUKURAN || Materi IPA Kelas 7 SMP
Summary
TLDRThis educational video script delves into the fundamental concept of measurement as part of observation. It explains the importance of using standardized units for accurate communication of observations, such as making clothes or buying fruits. The script introduces the International System of Units (SI), highlighting the seven base quantities and their units. It further explains derived quantities and provides examples of converting between different units of length, mass, and time. The video also covers the use of conversion scales and various measuring tools, aiming to clarify the process of measurement and its significance in everyday life.
Takeaways
- 📏 Observing objects with the senses is important, but often insufficient, so measurement is necessary to communicate accurate results.
- 👗 Measurement helps in daily tasks like tailoring clothes or buying fruits, ensuring precision in activities like these.
- ⚖️ Measurement is comparing a quantity with a standard unit. For example, measuring the length of a table in hand spans compares the table's length to the hand span unit.
- 📐 There are two types of units: standard units (e.g., meters, kilograms) and non-standard units (e.g., hand spans, feet), where non-standard units may vary between individuals.
- 📏 Basic quantities include length, mass, and time, which are measured in meters, kilograms, and seconds, respectively.
- 📊 The international system of units (SI) defines seven fundamental quantities, including length (meter), mass (kilogram), time (second), and others like temperature (Kelvin) and electric current (ampere).
- 🔄 Unit conversions involve multiplying or dividing by 10, depending on whether you move up or down the unit scale (e.g., converting kilometers to meters).
- ⚙️ Derived quantities, like area, volume, speed, and force, are calculated using basic quantities through multiplication or division (e.g., area = length x width).
- 📏 Common conversion examples include: 4.5 kilometers equals 4500 meters, and 1 millimeter equals 0.1 centimeters.
- ⚙️ Tools for measuring include scales for mass, stopwatches for time, and rulers or measuring tapes for length.
Q & A
What is the importance of measurement in observation?
-Measurement is crucial in observation as it provides a precise description of an object's characteristics, ensuring that the results can be accurately communicated to others.
Why is it necessary to use standardized units in measurement?
-Standardized units in measurement are necessary to ensure consistency and mutual understanding among people, regardless of their location.
What is an example of a non-standard unit of measurement mentioned in the script?
-Hasta, Depa, and Jengkal are mentioned as examples of non-standard units of measurement.
How many fundamental units of measurement are recognized by the International System of Units (SI)?
-There are seven fundamental units of measurement recognized by the SI, which include meter, kilogram, second, kelvin, ampere, candela, and mole.
What is the SI unit for length?
-The SI unit for length is the meter (m).
How can you convert kilometers to meters according to the script?
-To convert kilometers to meters, you multiply the number of kilometers by 1000 (since every step down the length unit ladder multiplies by 10).
What is the SI unit for mass?
-The SI unit for mass is the kilogram (kg).
How is the conversion between different units of mass described in the script?
-The conversion between different units of mass involves multiplying or dividing by powers of 10 as you move up or down the mass unit ladder.
What is the SI unit for time?
-The SI unit for time is the second (s).
How many seconds are there in an hour according to the script?
-There are 3600 seconds in an hour.
What is the difference between base quantities and derived quantities in the context of measurements?
-Base quantities are the fundamental physical quantities with agreed-upon units, while derived quantities are those that are defined in terms of base quantities through mathematical relationships.
Outlines
📏 Introduction to Measurement
This paragraph introduces the concept of measurement as a vital part of observation to describe objects accurately. It discusses the necessity of measurement for communication and provides examples such as tailoring clothes and buying fruits, emphasizing the importance of accurate measurement. The paragraph explains that measurement involves comparing a quantity to a standard unit of the same kind. It also differentiates between standard units (agreed upon by all, like meters, kilograms, seconds) and non-standard units (locally used, like hasta, depa, or jengkal). The video script continues with an example of measuring the length of a table using jengkal as a unit, illustrating the process of measurement.
🕰 Units of Measurement and Conversion
The second paragraph delves into the units of measurement for length, mass, and time. It explains how to use a unit conversion ladder for length, moving from larger units like kilometers to smaller ones like millimeters, with each step involving multiplication or division by 10. Examples are given to demonstrate how to convert kilometers to meters and millimeters to centimeters. The paragraph also covers the standard units for mass (kilograms) and time (seconds), along with their conversion factors. It mentions tools for measuring these quantities, such as scales for mass and clocks for time. The script concludes with a brief introduction to derived units, which are units of measurement that are derived from the basic units through multiplication or division, and provides examples like area, volume, speed, and acceleration.
Mindmap
Keywords
💡Measurement
💡Observation
💡Units of Measurement
💡Standard Units
💡Derived Units
💡Base Quantities
💡Conversion of Units
💡Length
💡Mass
💡Time
💡Non-Standard Units
Highlights
Introduction to the importance of measurement in observation and description of objects.
Measurement is essential for accurate communication of object sizes to others.
Example of how tailors use measurement to create well-fitted clothes.
Example of measuring the quantity of fruits like Dukuh to determine their amount accurately.
Definition of measurement as comparing a measured quantity to a standard unit.
Explanation of the concept of measurement units and their significance.
Differentiation between standard units and non-standard units in measurement.
Introduction to the International System of Units (SI) and its seven base quantities.
Listing of the seven base quantities and their respective SI units.
Explanation of length as a base quantity and its unit, the meter.
Description of how to use unit conversion ladders for length measurements.
Example of converting kilometers to meters using the unit conversion ladder.
Example of converting millimeters to centimeters and the calculation involved.
Introduction to mass as a base quantity and its unit, the kilogram.
Explanation of the mass unit conversion ladder and its application.
Introduction to time as a base quantity and its unit, the second.
Description of time unit conversion and examples of converting hours to seconds.
Introduction to derived quantities and their relation to base quantities.
Examples of derived quantities such as area, volume, speed, and acceleration.
Conclusion of the discussion with a summary and closing remarks.
Transcripts
hai hai
Hai assalamualaikum hai semuanya di
video kali ini kita akan melanjutkan
pembahasan bab 1 yaitu pengukuran
sebagai bagian dari pengamatan
[Musik]
Hai pengamatan objek dengan menggunakan
indra merupakan kegiatan yang penting
untuk menghasilkan deskripsi suatu benda
akan tetapi seringkali pengamatan
seperti itu tidak cukup Kamu memerlukan
pengamatan ia memberikan hasil yang
pasti ketika dikomunikasikan kepada
orang lain contoh Pernahkah kamu pergi
ke penjahit untuk meminta dibuatkan baju
Bagaimana penjahit dapat membuatkan baju
dengan ukuran yang tepat atau Pernahkah
kamu melihat Orang berjual beli buah
misalnya buah Dukuh Bagaimana menentukan
banyaknya dukun secara akurat semua
peristiwa di atas terkait dengan
kegiatan pengukuran Apa yang dimaksud
dengan pengukuran
Hai untuk menjawab pertanyaan tersebut
lakukanlah kegiatan mengukur panjang
meja contoh Putri melakukan kegiatan
mengukur panjang meja belajar dengan
jengkal panjang meja 6 jengkal apa yang
putri bandingkan ya jawabannya adalah
panjang meja dengan jengkal panjang
merupakan besaran 6 merupakan nilai dan
jengkal merupakan satuan jadi Pengukuran
adalah membandingkan suatu besaran yang
diukur dengan besaran sejenis yang
dipakai sebagai satuan segala sesuatu
yang dapat diukur disebut dengan besaran
Hai contoh lain Hasil kegiatan
pengukuran dalam kehidupan sehari-hari
satu panjang meja 1 meter 2 masa beras 2
KG tiga waktu tempuh 10 menit empat
panjang lidi 5 jengkal kegunaan satuan
baku dalam pengukuran satuan baku
merupakan satuan yang disepakati bersama
untuk semua orang contoh m kg menit
Celcius Kelvin ampere dan lain-lain
satuan tak baku merupakan satuan yang
hanya dipakai setempat hasil pengukuran
satuan tak baku bisa berbeda antara satu
orang dan lainnya contoh Hasta Depa dan
jengkal
hai
[Musik]
Hai selanjutnya kita akan membahas
macam-macam besaran besaran terbagi
menjadi dua yaitu satu besaran pokok dua
besaran turunan besaran pokok adalah
besaran yang memiliki nilai satuan yang
sudah disepakati oleh para ahli fisika
besaran pokok sediri dari tujuh macam
yang sudah disahkan oleh sistem satuan
internasional atau SI berikut adalah
tujuh besaran pokok beserta satuannya
satu panjang satuannya m dua massa
satuannya kilogram tiga waktu satuannya
sekon 4 suhu satuannya Kelvin 5 kuat
arus satuannya ampere 6
Hai jumlah cat satuannya Mal dan yang
ketujuh intensitas cahaya satuannya
adalah candela ada tiga besaran pokok
yang akan kita pelajari satu panjang dua
masa dan 3 waktu dalam.ipa panjang
menyatakan jarak antara dua titik
panjang menggunakan satuan dasar yaitu m
untuk menghitung satuan panjang dapat
menggunakan tangga konversi satuan
panjang
Hai cara menggunakan tangga satuan
panjang dari tangga paling atas kepaling
bawah kilometer hektometer dekameter
meter desimeter centimeter dan mm
mengubah satuan ke bawah setiap turun
satu tangga dikali 10 mengubah satuan ke
atas setiap naik satu tangga dibagi 10
contoh soal 4,5 km sama dengan berapa
meter dilihat dari tangga satuan dari
satuan km ke m turun tiga tangga
sehingga dapat diperoleh 4,5 dikali 1152
= 4500 m
Hai contoh ke-21 mm berapa cm dilihat
dari tangga satuan dari mm ke cm naik
satu tangga sehingga diperoleh satu
dibagi 10 hasilnya 0,1 cm Berikut adalah
contoh dari alat ukur panjang yang kedua
adalah masa-masa adalah Jumlah materi
yang terkandung dalam suatu benda satuan
massa Dalam standar internasional adalah
kg misalnya masa tubuhmu 52 kg massa
sever kelinci 3 kg massa sekantong gula
1 kg
[Musik]
Hai konversi satuan massa tangga
konversi satuan massa dari tangga paling
atas kepaling bawah kilogram hektogram
Dika g g g c g CG dan MG setiap turun
satu tangga dikali 10 setiap naik satu
tangga dibagi 10 alat ukur massa disebut
dengan neraca dan yang ketiga adalah
waktu satuan waktu dalam standar
internasional adalah sekon konversi
satuan waktu satu jam = 60menit satu
menit = 60-second satu jam = 3600 sekon
1
Q = 24jam satu tahun sama dengan 365
hari satu abad sama dengan 100 tahun
berikut adalah alat ukur waktu selain
besaran pokok yaitu besaran turunan Apa
yang dimaksud dengan besaran turunan
besaran turunan adalah satuan besaran
yang merupakan turunan dari besaran
pokok contohnya lewat perkalian atau
Pembagian dua besaran pokok dan lainnya
[Musik]
berikut adalah besaran turunan dan
contohnya nomor satu luas rumus l = p *
l satuan M2 dua volume rumus
mendengar p * l * t satuan M3 tiga
kecepatan rumus V = S dibagi teh satuan
meter per sekon 4 percepatan rumus a = v
dibagi tes satuan meter per sekon
pangkat dua massa jenis resam adengan m
dibagi V satuan kg per M3 gaya rumus f =
m dikali a1aaa n atau kg meter per sekon
pangkat dua daya rumus p = w dibagi t
satuannya sama dengan luas atau kg m3
per sekon pangkat dua Cukup sekian
penjelasan kali ini semoga bisa
bermanfaat saya akhiri wabilahitaufik
walhidayah wassalamualaikum
warahmatullahi
hai hai
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