Kelas IV Tema II

Explanation
When the light is turned on, there is a conversion of electrical energy into light energy. This is because light is produced when electric current flows through a light bulb or any other source of light. Therefore, the correct answer is "Cahaya" which means "Light" in English.

Explanation
The correct answer is "Angin" (wind). This is because wind energy is used to power windmills. Windmills have large blades that rotate when the wind blows, converting the kinetic energy of the wind into mechanical energy. This mechanical energy can then be used to do work, such as grinding grain or pumping water. Therefore, it is the wind that is used to move the windmill and generate energy.

Explanation
The correct answer is "Matahari" because the sun is the largest source of energy on Earth. It provides heat and light energy through nuclear fusion, which powers various processes on our planet such as photosynthesis, weather patterns, and the water cycle. The sun's energy is essential for sustaining life and driving natural phenomena on Earth.

Explanation
Bendungan memiliki beberapa manfaat, seperti untuk pembangkit listrik tenaga air (PLTA), irigasi, dan penyedia air bersih. Namun, mencegah abrasi bukanlah salah satu manfaat bendungan. Mencegah abrasi biasanya dilakukan dengan menggunakan struktur seperti tanggul atau tembok penahan agar tidak terjadi erosi atau pengikisan oleh air. Bendungan tidak memiliki fungsi langsung dalam mencegah abrasi.

Explanation
The correct answer is Avtur. Avtur is a type of fuel that is produced from the processing of crude oil. It is commonly used as aviation turbine fuel for jet engines. Therefore, avtur is the correct answer as it is a fuel derived from the processing of crude oil.

Explanation
A slogan is a short and catchy phrase or sentence that is used to convey a message or idea. It is designed to be memorable and easily understood by the audience. Slogans are often used in advertising campaigns or as a way to promote a brand or product. They are effective in capturing people's attention and conveying a specific message in a concise and memorable way. Therefore, a slogan fits the description of a short and catchy phrase that informs or communicates something.

Explanation
The correct answer is "menembus benda padat". This is because light cannot pass through solid objects. Light can travel in a straight line (merambat lurus), penetrate transparent objects (menembus benda bening), and be reflected (dapat dipantulkan), but it cannot pass through solid objects.

Explanation
Fotosintesis adalah proses di mana tumbuhan menggunakan energi cahaya matahari untuk mengubah air dan karbon dioksida menjadi glukosa dan oksigen. Proses ini mirip dengan memasak, di mana bahan mentah (air dan karbon dioksida) diubah menjadi makanan (glukosa) dengan bantuan energi (cahaya matahari). Oleh karena itu, jawaban yang tepat adalah "proses memasak pada tumbuhan".

Explanation
Cahaya putih pada matahari terdiri dari spektrum warna yang terdiri dari tujuh warna utama, yaitu merah, jingga, kuning, hijau, biru, nila, dan ungu. Oleh karena itu, jawaban yang benar adalah 7.

Explanation
Panas bumi (geothermal) adalah salah satu sumber energi alternative yang digunakan untuk menghasilkan listrik. Sumber energi ini menggunakan panas yang dihasilkan dari dalam bumi untuk menggerakkan turbin dan menghasilkan energi listrik. Oleh karena itu, panas bumi tidak termasuk dalam sumber energi alternative yang tidak benar.