Environmental Studies Quiz For 4th Grade

Explanation
The correct answer is Root. The root is the part of the plant that grows under the soil. It anchors the plant in the ground and absorbs water and nutrients from the soil. The shoot, fruit, and branch are all parts of the plant that grow above the ground.

Explanation
The brain controls all our actions by sending signals to different parts of the body. It is responsible for coordinating movement, interpreting sensory information, and regulating bodily functions. Without the brain, we would not be able to think, feel, or perform any voluntary actions. The brain also controls involuntary actions such as breathing and heartbeat. Overall, the brain is the central command center of the body, controlling and coordinating all our actions.

Explanation
Plants prepare their food through a process called photosynthesis. During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose (a type of sugar) and oxygen. This process occurs in the chloroplasts of plant cells, specifically in the green pigment called chlorophyll. The energy from sunlight is used to convert carbon dioxide and water into glucose, which serves as the plant's source of energy. Oxygen is released as a byproduct of photosynthesis.

Explanation
The Sun is a star because it is a massive, hot ball of gas that emits light and heat. It is the closest star to Earth and is essential for sustaining life on our planet. The Sun undergoes nuclear fusion, where hydrogen atoms combine to form helium, releasing a tremendous amount of energy in the process. Its immense gravitational pull holds the planets in orbit around it. The Sun's energy is also responsible for weather patterns, climate, and the Earth's water cycle.

Explanation
We eat the buds of a cauliflower. Cauliflower is a vegetable that belongs to the cabbage family, and its edible part is the immature flower buds. These buds are tightly packed together in a head, commonly referred to as the "cauliflower head." The buds are harvested before they fully open into flowers, and they have a crisp texture and a mild, slightly sweet flavor. They are commonly used in cooking and can be boiled, steamed, roasted, or even eaten raw in salads or as a snack.

Explanation
Rain is the correct answer because it is one of the primary sources of water on Earth. When water evaporates from the surface of oceans, lakes, and rivers, it forms clouds. These clouds then release moisture in the form of rain, which falls back to the Earth's surface. Rainwater is essential for replenishing water bodies, providing water for agriculture, and sustaining ecosystems. While the other options like sea, river, and lake are important sources of water, they are ultimately dependent on the water cycle, which is driven by rain.

Explanation
Telephone is not a means of mass communication because it allows for direct communication between two individuals or a small group of people, rather than reaching a large audience. Unlike newspapers, radio, and television, which can transmit information to a wide range of people simultaneously, telephone communication is typically one-on-one or limited to a few participants. Therefore, it does not qualify as a mass communication medium.

Explanation
A house on wheels is commonly known as a caravan. It is a mobile home that can be towed behind a vehicle and provides accommodation for people while traveling or on vacation. Caravans are designed to be self-sufficient with facilities such as sleeping areas, kitchen, bathroom, and living space. They offer the convenience of a home while being portable and allowing individuals to explore different locations without the need for fixed accommodation.

Explanation
The skin is the largest sense organ in the human body. It is responsible for detecting various sensations such as touch, pressure, temperature, and pain. The skin contains numerous sensory receptors that send signals to the brain, allowing us to perceive and respond to our environment. It acts as a protective barrier, regulates body temperature, and plays a crucial role in our sense of touch.

Explanation
A large and long-lasting river of ice is called a glacier. Glaciers are formed over many years as layers of snow accumulate and compress into ice. They move slowly downhill due to the force of gravity, shaping the landscape as they go. Glaciers can be found in mountainous regions and polar areas. They play a crucial role in shaping the Earth's surface and are important sources of freshwater.