Explanation text adalah jenis teks yang menjelaskan proses terjadinya suatu fenomena atau bagaimana sesuatu bekerja. Untuk siswa kelas 11 SMA, memahami explanation text sangat penting karena melatih critical thinking dan sering muncul dalam ujian.

Artikel ini menyediakan 15 contoh soal explanation text kelas 11 pilihan ganda dan jawaban lengkap dengan pembahasan.

Jenis-jenis Explanation Text

Jenis Penjelasan Contoh
Natural Phenomena Fenomena alam How rain occurs, Earthquake
Social Phenomena Fenomena sosial Inflation, Unemployment
Scientific Process Proses ilmiah Photosynthesis, Digestion
Technology Cara kerja teknologi How internet works

15 Contoh Soal Pilihan Ganda

Text 1: How Rain Happens

Read the text below to answer questions 1-5.

How Rain Happens

Rain is one of the most important parts of the water cycle. It is essential for life on Earth as it provides fresh water for drinking, agriculture, and various other purposes. But how exactly does rain occur?

The process of rain formation begins with evaporation. The sun heats water in oceans, rivers, and lakes, causing it to evaporate and turn into water vapor. This water vapor rises into the atmosphere because it is lighter than air.

As the water vapor rises higher into the atmosphere, it encounters cooler temperatures. When the water vapor cools down, it undergoes a process called condensation. During condensation, water vapor changes back into tiny water droplets. These tiny droplets gather around dust particles or other small particles in the air, forming clouds.

As more and more water droplets accumulate in the clouds, they become heavier. When the water droplets become too heavy for the air to hold, they fall to the ground as precipitation. Depending on the temperature, this precipitation can fall as rain, snow, sleet, or hail.

Once the precipitation reaches the ground, it flows into streams and rivers, eventually making its way back to oceans and lakes. The cycle then begins again with evaporation. This continuous process is known as the water cycle or hydrological cycle.

Understanding how rain happens helps us appreciate the complexity of natural processes and the importance of water conservation.

Question 1: What is the purpose of the text?

a. To describe rain

b. To tell a story about rain

c. To explain how rain occurs

d. To persuade people to save water

e. To give information about the water cycle in general

Answer: c. To explain how rain occurs Pembahasan: Tujuan explanation text adalah menjelaskan proses, dalam hal ini proses terjadinya hujan.

Question 2: What is the first step in rain formation?

a. Condensation

b. Precipitation

c. Evaporation

d. Accumulation

e. Cooling

Answer: c. Evaporation Pembahasan: “The process of rain formation begins with evaporation.”

Question 3: What happens during condensation?

a. Water turns into vapor

b. Water vapor changes back into droplets

c. Water falls to the ground

d. The sun heats the water

e. Clouds become heavier

Answer: b. Water vapor changes back into droplets Pembahasan: “During condensation, water vapor changes back into tiny water droplets.”

Question 4: Why do water droplets fall to the ground?

a. Because the sun pushes them

b. Because they are too light

c. Because they become too heavy

d. Because of the wind

e. Because they freeze

Answer: c. Because they become too heavy Pembahasan: “When the water droplets become too heavy for the air to hold, they fall to the ground.”

Question 5: What tense is mainly used in the text?

a. Simple past tense

b. Simple present tense

c. Present continuous tense

d. Past continuous tense

e. Future tense

Answer: b. Simple present tense Pembahasan: Explanation text menggunakan simple present tense untuk menjelaskan proses yang berlaku umum.

Text 2: How Photosynthesis Works

Read the text below to answer questions 6-10.

How Photosynthesis Works

Photosynthesis is a vital biological process that enables plants to produce their own food. This process is essential not only for plants but also for all life on Earth, as it produces oxygen and forms the base of the food chain.

Photosynthesis occurs primarily in the leaves of plants, specifically in structures called chloroplasts. These chloroplasts contain a green pigment called chlorophyll, which gives plants their green color and plays a crucial role in capturing light energy.

The process begins when chlorophyll absorbs light energy from the sun. This light energy is then used to power a series of chemical reactions. During these reactions, plants take in carbon dioxide from the air through tiny pores in their leaves called stomata.

At the same time, plants absorb water from the soil through their roots. The water travels up through the stem to the leaves via specialized tissues called xylem. Once in the leaves, the water molecules are split apart using the light energy that was absorbed earlier.

The light energy is used to combine the carbon dioxide and water molecules through a complex series of reactions. This process produces glucose, a type of sugar that plants use for energy and growth. As a byproduct of this process, oxygen is released into the atmosphere through the stomata.

The glucose produced during photosynthesis serves multiple purposes. Plants use some of it immediately for energy to carry out their life processes. The rest is stored in various parts of the plant, such as roots, stems, and fruits, often in the form of starch.

Photosynthesis can be summarized by the chemical equation: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. This equation shows that six molecules of carbon dioxide and six molecules of water, using light energy, produce one molecule of glucose and six molecules of oxygen.

Question 6: Where does photosynthesis primarily occur?

a. In the roots

b. In the stem

c. In the chloroplasts in leaves

d. In the flowers

e. In the soil

Answer: c. In the chloroplasts in leaves Pembahasan: “Photosynthesis occurs primarily in the leaves of plants, specifically in structures called chloroplasts.”

Question 7: What is the function of chlorophyll?

a. To absorb water

b. To capture light energy

c. To produce oxygen

d. To store glucose

e. To transport water

Answer: b. To capture light energy Pembahasan: “…chlorophyll, which gives plants their green color and plays a crucial role in capturing light energy.”

Question 8: What do plants take in from the air during photosynthesis?

a. Oxygen

b. Nitrogen

c. Carbon dioxide

d. Hydrogen

e. Water vapor

Answer: c. Carbon dioxide Pembahasan: “…plants take in carbon dioxide from the air through tiny pores in their leaves.”

Question 9: What is the main product of photosynthesis?

a. Water

b. Carbon dioxide

c. Oxygen

d. Glucose

e. Chlorophyll

Answer: d. Glucose Pembahasan: “This process produces glucose, a type of sugar that plants use for energy and growth.”

Question 10: What is released as a byproduct of photosynthesis?

a. Carbon dioxide

b. Oxygen

c. Nitrogen

d. Glucose

e. Water

Answer: b. Oxygen Pembahasan: “As a byproduct of this process, oxygen is released into the atmosphere.”

Text 3: How Earthquakes Occur

Read the text below to answer questions 11-15.

How Earthquakes Occur

An earthquake is a sudden shaking of the ground caused by the movement of the Earth’s tectonic plates. Earthquakes can range from minor tremors that are barely noticeable to massive quakes that cause widespread destruction. Understanding how earthquakes occur helps us prepare for and mitigate their impacts.

The Earth’s outer layer, called the lithosphere, is divided into several large pieces known as tectonic plates. These plates are constantly moving, although very slowly, at a rate of just a few centimeters per year. The movement is driven by the heat from the Earth’s core, which creates convection currents in the mantle beneath the plates.

Most earthquakes occur at the boundaries where tectonic plates meet. There are three main types of plate boundaries. At convergent boundaries, plates move toward each other. At divergent boundaries, plates move apart from each other. At transform boundaries, plates slide past each other horizontally.

As the tectonic plates move, they can become locked together at their edges due to friction. However, the rest of the plates continue to move, causing stress to build up over time. This stress accumulates until it exceeds the strength of the rocks holding the plates together.

When the stress becomes too great, the rocks suddenly break or slip, releasing the accumulated energy in the form of seismic waves. This sudden release of energy is what causes the ground to shake during an earthquake. The point where the rocks first break is called the focus or hypocenter, and it is located beneath the Earth’s surface.

The seismic waves travel outward from the focus in all directions. The point on the Earth’s surface directly above the focus is called the epicenter. This is usually where the shaking is strongest and where the most damage occurs.

There are different types of seismic waves. Primary waves (P-waves) are the fastest and arrive first. Secondary waves (S-waves) are slower but more destructive. Surface waves travel along the Earth’s surface and cause the most damage to buildings and structures.

The magnitude of an earthquake is measured using the Richter scale or the moment magnitude scale. These scales measure the energy released during an earthquake. The intensity of shaking and damage at any location is measured using the Modified Mercalli Intensity scale.

Question 11: What causes earthquakes?

a. Volcanic eruptions

b. Movement of tectonic plates

c. Heavy rainfall

d. Strong winds

e. Ocean currents

Answer: b. Movement of tectonic plates Pembahasan: “An earthquake is a sudden shaking of the ground caused by the movement of the Earth’s tectonic plates.”

Question 12: How fast do tectonic plates move?

a. Several meters per year

b. Several centimeters per year

c. Several kilometers per year

d. They don’t move

e. Very fast

Answer: b. Several centimeters per year Pembahasan: “These plates are constantly moving…at a rate of just a few centimeters per year.”

Question 13: What causes stress to build up in tectonic plates?

a. They become locked due to friction

b. They move very fast

c. They are very heavy

d. The sun heats them

e. Ocean water pushes them

Answer: a. They become locked due to friction Pembahasan: “…they can become locked together at their edges due to friction. However, the rest of the plates continue to move, causing stress to build up.”

Question 14: What is the focus of an earthquake?

a. The point on the surface with most damage

b. The point where rocks first break beneath the surface

c. The strongest seismic wave

d. The scale used to measure earthquakes

e. The boundary between plates

Answer: b. The point where rocks first break beneath the surface Pembahasan: “The point where the rocks first break is called the focus or hypocenter, and it is located beneath the Earth’s surface.”

Question 15: Which seismic waves are the fastest?

a. Surface waves

b. S-waves

c. P-waves

d. All waves travel at the same speed

e. Secondary waves

Answer: c. P-waves Pembahasan: “Primary waves (P-waves) are the fastest and arrive first.”

Perbedaan Explanation dan Procedure Text

Aspek Explanation Text Procedure Text
Tujuan Menjelaskan BAGAIMANA/MENGAPA Menjelaskan CARA melakukan
Fokus Proses natural/ilmiah Langkah-langkah manual
Contoh How rain occurs How to make tea
Bahasa Passive voice umum Imperative (commands)

Strategi Membaca Explanation Text

1. Read the Title

Judul memberitahu fenomena apa yang akan dijelaskan.

2. Identify General Statement

Paragraf pertama biasanya pengenalan umum.

3. Follow the Sequence

Ikuti urutan proses dengan teliti.

4. Understand Cause-Effect

Pahami hubungan sebab-akibat antar tahapan.

5. Note Technical Terms

Catat istilah-istilah penting dan artinya.

Kesimpulan

Soal explanation text kelas 11 pilihan ganda menguji kemampuan memahami proses atau fenomena dan hubungan sebab-akibat. Untuk sukses:

  • Pahami struktur: General Statement dan Sequenced Explanation
  • Fokus pada urutan proses
  • Kenali sequence connectors dan causal conjunctions
  • Pahami technical/scientific terms
  • Visualisasikan proses yang dijelaskan

Explanation text berbeda dari procedure karena fokus pada proses natural/ilmiah, bukan instruksi manual. Dengan 15 soal dari tiga topik berbeda (rain, photosynthesis, earthquakes), siswa sudah memiliki pemahaman yang solid.

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