1.
- Salah satu jenis batuan beku yang digunakan untuk campuran semen adalah …
Correct Answer
A. Apung
Explanation
Apung adalah salah satu jenis batuan beku yang digunakan sebagai campuran semen. Batuan ini memiliki tekstur ringan dan pori-pori yang banyak, sehingga cocok digunakan untuk mengurangi berat beton. Selain itu, apung juga memiliki daya tahan yang baik terhadap tekanan dan panas, sehingga dapat digunakan dalam konstruksi bangunan.
2.
Struktur bumi terbagi menjadi 5 bagian, yaitu
Correct Answer(s)
A. Inti bumi dalam
B. Inti bumi luar
D. Mantel bumi
G. Kerak bumi
J. Atmosfer
Explanation
The correct answer includes the five main layers of the Earth's structure: the inner core, outer core, mantle, crust, and atmosphere. These layers are arranged in order from the center of the Earth outward. The inner core is the solid, innermost layer, followed by the liquid outer core. The mantle is a thick layer of semi-solid rock, and the crust is the thin, outermost layer that we live on. The atmosphere is the layer of gases that surrounds the Earth.
3.
Atmosfer tersusun dari beberapa lapisan, salah satunya adalah ...
Correct Answer(s)
Troposfer
Stratosfer
Mesosfer
Termosfer
Ekosfer
Explanation
The correct answer is all of the above. The atmosphere is composed of several layers, including the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has its own unique characteristics and plays a role in the Earth's climate and weather patterns.
4.
Lapisan matahari tersusun dari 6 lapisan yaitu ….Lapisan inti matahari, zona radiasi, zona konveksi, fotosfer, kromosfer dan korona
Correct Answer
A. True
Explanation
The given statement is true. The sun's layers are composed of the core, radiative zone, convective zone, photosphere, chromosphere, and corona. These layers make up the structure of the sun and play different roles in its energy production and emission of light and heat.
5.
- Dua samudera terluas di bumi adalah …
Correct Answer
D. Pasifik dan Hindia
Explanation
The correct answer is Pasifik dan Hindia. The question asks for the two largest oceans on Earth, and the Pacific and Indian oceans are the correct answer. The Atlantic and Arctic oceans are not the largest in terms of size.
6.
Bukan fingsi atmosfer bumi adalah ...
Correct Answer
D. Memperindah bentuk bumi
7.
Kandungan oksigen dalam bumi ialah ...
Correct Answer
C. 20 %
Explanation
The correct answer is 20%. This is because the Earth's atmosphere is composed of approximately 20% oxygen. Oxygen is essential for the survival of many organisms, including humans, as it is required for respiration.
8.
Ketebalan atmosfer diperkirakan sebesar ...
Correct Answer
A. 650 km
Explanation
The estimated thickness of the atmosphere is 650 km.
9.
Lapisan paling dalam di bumi ialah ...
Correct Answer
Kerak bumi
Explanation
The correct answer is "Kerak bumi." The question asks for the innermost layer of the earth, and the answer "Kerak bumi" refers to the Earth's crust, which is the outermost layer of the Earth. This suggests that the question is asking for the layer closest to the surface, rather than the innermost layer.
10.
Satu kali rotasi bumi membutuhkan waktu ...
Correct Answer
B. 24 jam
Explanation
One rotation of the Earth takes 24 hours, which is equivalent to one day. This is because the Earth rotates on its axis, causing day and night to occur. Therefore, it takes 24 hours for the Earth to complete one full rotation and return to its original position.
11.
Bumi terletak dalam tata surya yang pusatnya ...
Correct Answer
A. Matahari
Explanation
The correct answer is "Matahari" because the question is asking about the center of the solar system, and the sun, or "Matahari" in Indonesian, is the central star of our solar system. It is the source of heat and light and all the planets, including Earth, revolve around it.
12.
Bumi memiliki satu satelit yaitu ...
Correct Answer
B. Bulan
Explanation
The correct answer is "Bulan" because it is a well-known fact that Earth has one natural satellite, which is the Moon. The other options, such as Matahari (Sun), Bintang (Star), and Gakalsi (an unknown term), are not correct as they do not represent Earth's satellite.
13.
Pelapukan secara fisis terjadi karena ...
Correct Answer(s)
A. Angin
B. Hujan
C. Suhu
Explanation
Pelapukan secara fisis terjadi karena angin, hujan, dan suhu. Angin dapat memecahkan batuan dan mengikis permukaan benda-benda dengan membawa partikel-partikel kecil yang dapat merusaknya. Hujan juga dapat memecahkan batuan dan mengikis permukaan dengan air yang jatuh dengan tekanan. Suhu juga berperan dalam pelapukan fisis karena perubahan suhu yang ekstrem dapat menyebabkan kontraksi dan ekspansi pada benda-benda, yang pada gilirannya dapat menyebabkan pecah atau retaknya benda tersebut.
14.
Bulan beredar mengelilingi matahari
Correct Answer
B. False
Explanation
The given statement "Bulan beredar mengelilingi matahari" translates to "The moon revolves around the sun." This statement is incorrect as the moon revolves around the Earth, not the sun. The moon's orbit is a result of the gravitational pull between the Earth and the moon. Therefore, the correct answer is False.