Science Quiz For Grade 3 Plants

Plants use energy from the Sun to make food through a process called photosynthesis. During photosynthesis, plants capture sunlight using a pigment called chlorophyll, which allows them to convert the energy from sunlight into chemical energy. This chemical energy is then used to convert carbon dioxide and water into glucose, a form of sugar that plants use as food. Therefore, the correct answer is Sun.

The question asks for three parts of a plant, and the answer includes stem, flower, and leaf. These three components are indeed parts of a plant. The stem provides support and transportation of nutrients and water, the flower is the reproductive structure of the plant, and the leaf is responsible for photosynthesis and gas exchange. The inclusion of "Rose" in the answer is incorrect, as it is a specific type of flower and not a general part of all plants.

The leaves of a plant are responsible for making food through a process called photosynthesis. They contain chlorophyll, a green pigment that captures sunlight, which is then used to convert carbon dioxide and water into glucose, a type of sugar that plants use for energy and growth. The roots absorb water and nutrients, the stem supports the plant, and the flowers are involved in reproduction, but it is the leaves that are the food factories of the plant.

Plants undergo a process called photosynthesis, where they use sunlight, water, and carbon dioxide to produce oxygen and glucose. Oxygen is released as a byproduct of this process and is essential for the survival of animals and humans as it is required for cellular respiration. Therefore, plants give off oxygen, which animals and people breathe in.

The root of a plant absorbs water and nutrients from the soil and stores them for the plant's growth and development. Additionally, the root provides support and anchors the plant in the ground, preventing it from being easily uprooted or toppled over. Therefore, the root is responsible for both nutrient absorption and support in plants.

Leaves of plants have small openings called stomata that allow them to take in carbon dioxide from the air. This process is known as photosynthesis, where plants convert carbon dioxide into oxygen and glucose using sunlight. Animals, including humans, release carbon dioxide as a waste product during respiration. Therefore, leaves play a crucial role in the exchange of gases between plants and animals.

Plants use photosynthesis to convert sunlight, carbon dioxide, and water into glucose (a type of sugar) and oxygen. This glucose serves as food for the plant, providing energy for growth and development. Therefore, the correct answer is "Food."

Corn, peanuts, and sunflowers are three plants that humans commonly use for food. Corn is a staple crop that is used in various forms, such as cornmeal, corn oil, and corn syrup. Peanuts are a legume that is consumed in many ways, including as peanut butter and oil. Sunflowers are cultivated for their seeds, which can be eaten as a snack or used in cooking and baking. These plants provide essential nutrients and are widely consumed in different cultures around the world.

Flowers are the reproductive structures of plants. They produce nectar to attract pollinators like bees and butterflies, which helps in the process of pollination. After successful pollination, the flower develops into a fruit, which contains seeds. The fruit serves as a protective covering for the seeds and aids in dispersal. Therefore, it can be concluded that flowers grow fruits and seeds as part of their reproductive cycle.

Plants play a crucial role in protecting the environment and benefiting humans in various ways. Firstly, plant roots hold the soil together, preventing erosion and maintaining the stability of the land. This helps to prevent soil degradation and the loss of fertile soil. Secondly, plants are responsible for producing oxygen through the process of photosynthesis, which is essential for humans and other living organisms to breathe. Lastly, while not mentioned in the question, plants also provide food for humans, contributing to our sustenance and nutrition.