# Ulangan 7b-IPA Dan Objek Pengamatannya

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KERJAKAN DENGAN PENUH KEJUJURAN..JANGAN LUPA PRINT OUT SERTIFIKATNYA ATAU PRINT SCREEN..OKAY

• 1.

### OBJEK PENGAMATAN IPA TERDAPAT DI....

• A.

BUMI

• B.

TANAH

• C.

UDARA

• D.

BUMI DAN ANTARIKSA

D. BUMI DAN ANTARIKSA
Explanation
The correct answer is "BUMI DAN ANTARIKSA". This answer is correct because the question is asking about the objects of observation in science (IPA). The objects of observation can be found on both the Earth and in space (antariksa). Therefore, the correct answer includes both "BUMI" (Earth) and "ANTARIKSA" (space).

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• 2.

### Dalam IPA, proses pengamatannya tidak terlepas dari proses PENGUKURAN. APa yang dimaksud dengan Pengukuran....

• A.

Mengukur menggunakan alat

• B.

Membandingkan suatu besaran dengan satuan yang lain

• C.

Membandingkan suatu besaran dengan besaran yang lain yang digunakan sebagai satuan

• D.

Membandingkan satuan dengan satuan standar

C. Membandingkan suatu besaran dengan besaran yang lain yang digunakan sebagai satuan
Explanation
The correct answer is "Membandingkan suatu besaran dengan besaran yang lain yang digunakan sebagai satuan." This means that measurement in science involves comparing one quantity with another quantity that is used as a unit of measurement.

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• 3.

### Panjang meja ARMI  lima kali pensil UMI.  Yang merupakan satuan adalah....

• A.

Pensil

• B.

Umi

• C.

Lima kali

• D.

ARMI

A. Pensil
Explanation
The correct answer is "pensil" because the question states that "Panjang meja ARMI is five times the length of pensil UMI." This indicates that the length of pensil UMI is being compared to the length of the table ARMI, making "pensil" the unit of measurement being referred to in the question.

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• 4.

### Dalam sistem internasional (SI), satuan dari waktu  adalah....

• A.

Jam

• B.

Menit

• C.

Detik

• D.

Milidetik

C. Detik
Explanation
The correct answer is "detik" because in the International System of Units (SI), time is measured in seconds. This is the base unit for time and is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.

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• 5.

### Di dalam IPA, FISIKA mempelajari tentang....

• A.

Penyusun dan perubahan Zat

• B.

Sistem kehidupan mulai dari ukuran renik (kecil) sampai dengan lingkungan yang luas

• C.

Asal mula bumi, perkembangan dan keadaan saat ini, bintang, planet dan berbagai benda langit lainnya

• D.

Aspek mendasar alam, seperti energi, gaya, gerak, panas dan berbagai gejala fisik lainnya

D. Aspek mendasar alam, seperti energi, gaya, gerak, panas dan berbagai gejala fisik lainnya
Explanation
FISIKA dalam IPA mempelajari aspek mendasar alam seperti energi, gaya, gerak, panas, dan berbagai gejala fisik lainnya. Ini berarti bahwa FISIKA memfokuskan pada pemahaman tentang bagaimana energi berinteraksi dengan materi dan bagaimana materi bergerak dan berperilaku dalam berbagai situasi. FISIKA juga membahas tentang gaya yang mempengaruhi gerakan dan perubahan materi, serta bagaimana panas dipindahkan dan berperilaku dalam sistem fisik. Selain itu, FISIKA juga mempelajari berbagai gejala fisik seperti suara, cahaya, dan listrik.

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• 6.

### Tinggi Aurella adalah 145 cm, jika tinggi Aurella dinyatakan dalam satuan SI, maka tingginya adalah....

• A.

4.5 meter

• B.

14.5 meter

• C.

1.45 meter

• D.

0.145 meter

C. 1.45 meter
Explanation
The correct answer is 1.45 meter. This is because the given height of Aurella is 145 cm. To convert cm to meter, we divide the value by 100. Therefore, 145 cm is equal to 1.45 meter.

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• 7.

### Alat yang digunakan untuk mengukur massa jenis zat cair  adalah....

• A.

Neraca

• B.

Neraca pegas

• C.

Hidrometer

• D.

Termometer

A. Neraca
Explanation
A neraca is a balance scale that is commonly used to measure the mass of an object. In the context of measuring the density of a liquid, a neraca can be used to measure the mass of a known volume of the liquid. By dividing the mass by the volume, the density, or mass per unit volume, of the liquid can be calculated. Therefore, a neraca is a suitable tool for measuring the density of a liquid, which is the mass per unit volume of the liquid.

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• 8.

### waktu yang terbaca oleh stopwatch di atas adalah....

• A.

1 menit 8 detik

• B.

8 menit 1 detik

• C.

8 detik

• D.

5.3 detik

C. 8 detik
Explanation
The correct answer is 8 detik. This is because the question asks for the time read by the stopwatch, and the only option that represents a time is 8 detik. The other options are either a combination of minutes and seconds or just seconds, but the question does not mention any minutes. Therefore, the correct answer is 8 detik.

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• 9.

### Berdasarkan jenis satuannya, besaran dapat dikelompokkan menjadi....

• A.

Besaran pokok dan besaran inti

• B.

Besaran Pokok dan besaran primer

• C.

Besaran standar dan nonstandar

• D.

Besaran Pokok dan Besaran Turunan

D. Besaran Pokok dan Besaran Turunan
Explanation
Besaran dapat dikelompokkan menjadi besaran pokok dan besaran turunan berdasarkan jenis satuannya. Besaran pokok adalah besaran dasar yang tidak dapat dinyatakan dalam satuan-satuan lainnya, sedangkan besaran turunan adalah besaran yang dapat dinyatakan dalam satuan-satuan pokok melalui rumus atau persamaan matematis.

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• 10.

### Untuk mengukur Volume benda tak beraturan, kita dapat menggunakan....

• A.

Gelas aqua

• B.

Gelas ukur

• C.

Gelas berpancuran

• D.

Gelas ukur dan gelas berpancuran

D. Gelas ukur dan gelas berpancuran
Explanation
The correct answer is "gelas ukur dan gelas berpancuran." To measure the volume of an irregular object, we can use a measuring cup and a displacement cup. A measuring cup is used to measure the volume of liquids, while a displacement cup is used to measure the volume of irregular solids by measuring the amount of liquid displaced when the object is submerged in the cup. Using both types of cups allows for accurate measurement of the volume of irregular objects.

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• 11.

### Yang merupakan kelompok besaran turunan  adalah...

• A.

Panjang, massa dan kecepatan

• B.

Panjang, massa dan berat

• C.

Panjang, massa dan waktu

• D.

Luas, kecepatan dan volume

D. Luas, kecepatan dan volume
Explanation
The correct answer is luas, kecepatan, dan volume. These are considered derived quantities because they are calculated or derived from the basic quantities of length, mass, and time. Area (luas) is derived from length, velocity (kecepatan) is derived from length and time, and volume is derived from length cubed.

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• 12.

### Massa suatu benda cenderung tetap, sedangkan beratnya cenderung berubah. Yang menyebabkan berat suatu benda cenderung berubah adalah....

• A.

Gaya berat

• B.

Gaya newton

• C.

Gaya gravitasi

• D.

Gaya pegas

C. Gaya gravitasi
Explanation
The weight of an object tends to change because it is influenced by the force of gravity. The force of gravity is the force that attracts objects towards each other. Therefore, the correct answer is "gaya gravitasi" (gravitational force).

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• 13.

### Ika diketahui massa air dalam gelas  adalah 200 gram, sedangkan massa jenis air adalah , maka volume air dalam gelas tersebut adalah....

• A.

150 cm3

• B.

170 cm3

• C.

190 cm3

• D.

200 cm3

D. 200 cm3
Explanation
The given question is asking for the volume of water in the glass. The mass of the water is given as 200 grams, and the density of water is not provided. However, the answer is given as 200 cm3. Since the density of water is commonly known to be 1 g/cm3, we can assume that the density of water is 1 g/cm3 in this scenario. Therefore, the volume of water in the glass is equal to its mass, which is 200 cm3.

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• 14.

### Panjang sisi sisi kubus logam adalah 2 cm. Jika massa kubus tersebut adalah 24 gram, maka massa jenis kubus logam tersebut adalah....

• A.

1 gram/cm3

• B.

2 gram/cm3

• C.

3 gram/cm3

• D.

4 gram/cm3

C. 3 gram/cm3
Explanation
The density of an object is calculated by dividing its mass by its volume. In this case, the mass of the cube is given as 24 grams and the length of one side of the cube is given as 2 cm. Since the cube is a regular shape, its volume can be calculated by multiplying the length of one side by itself twice (2 x 2 x 2 = 8 cm3). To find the density, we divide the mass (24 grams) by the volume (8 cm3), which gives us a density of 3 gram/cm3.

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• 15.

### Jika volume segelas air adalah 250 ml, maka massa air  dalam gelas tersebut adalah....(massa jenis air 1 )

• A.

200 gram

• B.

220 gram

• C.

240 gram

• D.

250 gram

D. 250 gram
Explanation
The given question asks for the mass of water in a glass if the volume is 250 ml and the density of water is 1 g/ml. The density of water is the mass per unit volume. Since the volume is given as 250 ml, the mass of water in the glass would be 250 grams.

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• 16.

### Haya melarutkan 5 gram gula ke dalam 500 ml air, maka konsentrasi larutan gula yang terbentuk adalah....

• A.

5 gram/L

• B.

7 gram/L

• C.

10 gram/L

• D.

12 gram/L

C. 10 gram/L
Explanation
The concentration of a solution is calculated by dividing the mass of the solute (in this case, 5 grams of sugar) by the volume of the solution (in this case, 500 ml of water). So, the concentration of the sugar solution is 5 grams / 500 ml = 0.01 grams/ml. To convert this to grams per liter (g/L), we multiply by 1000 to get 10 grams/L. Therefore, the correct answer is 10 gram/L.

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• 17.

### Rehan  menanam kecambah dalam pot. Pada awal pengukuran, tinggi kecambah dari permukaan tanah adalah 2 cm. jika laju pertumbuhan kecambah adalah 2 cm/hari, maka setelah 5 hari, tinggi kecambah adalah....

• A.

10 cm

• B.

11 cm

• C.

12 cm

• D.

13 cm

C. 12 cm
Explanation
The initial height of the seedling is 2 cm. The growth rate of the seedling is 2 cm per day. Therefore, after 5 days, the seedling would have grown by 2 cm per day for 5 days, resulting in a total growth of 10 cm. Adding this growth to the initial height of 2 cm gives a final height of 12 cm.

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• 18.

### alat ukur tersebut di atas dinamakan dengan....

• A.

Micrometer screw

• B.

Jangkasorong

• C.

Rollmeter

• D.

Mistar