Water droplets on a leaf (Kyle Szegedi, Unsplash)
Water droplets on a leaf (Kyle Szegedi, Unsplash)
Let's Talk Science
5.1
How does this align with my curriculum?
Grade | Course | Topic |
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ONKThe Kindergarten Program (2016)14. demonstrate an awareness of the natural and built environment through hands-on investigations, observations, questions, and representations of their findings
NU1K-6 Science and Technology Curriculum (NWT, 2004)Life Systems: Characteristics and Needs of Living Things
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Plants have specific needs - light, air, water, nutrients, and space - to survive and reproduce.
Almost all plants need these five things to survive:
- Light
- Air
- Water
- Nutrients
- Space to grow
Light
Plants usually get the light they need from the Sun. But they can also grow in artificial light. Plants use light energy to make a type of sugar called glucose. They use glucose as their energy source.
Plants make glucose in a part of their leaf cells called the chloroplast. Each chloroplast contains a green pigment called chlorophyll. It’s what allows the plant to absorb light energy.
If a plant doesn’t receive enough light, it will grow very slowly. But too much light can cause the plant and the soil it lives in to dry out.
Different plants have different light requirements. Some need bright or direct light. Others can thrive in dimmer or indirect light.
Misconception Alert
Almost all plants need light to survive but there are a few special exceptions. Some parasitic plants like the corpse lily do not have chlorophyll and only get their energy by stealing it from other plants.
Air
Air contains many gases. They include nitrogen, oxygen, carbon dioxide and water vapour.
Graph - Text Version
Air is made up of approximately 78 percent nitrogen, 21 percent oxygen, one percent argon and 0.038 carbon dioxide. Air also has very small amounts of neon, helium, krypton, hydrogen and xenon.
Using energy from light, plants chemically combine carbon dioxide and water to create glucose and oxygen. This process is called photosynthesis.
Plants also absorb oxygen gas from the air. Like animals, plants need oxygen to respire. Respiration is the process of breaking down molecules, like glucose, for energy.
Misconception Alert
Sometimes people think that plants use heat from the Sun for photosynthesis. Photosynthesis uses the Sun’s light energy, not its heat energy. Plants can photosynthesize in both warm and cold places. In fact, different plants have evolved to grow in different climates all around the world!
Water
Plants need water for photosynthesis. Absorbed by the roots, water travels through a plant’s stems to the chloroplasts in the leaves. Water also helps move nutrients from the soil into the plant. Too little water can cause a plant to wilt or droop. Too much water can cause a plant’s roots to rot.
Misconception Alert
Plants can absorb small amounts of water through their leaves. But they get most of the water they need through their roots.
Nutrients
Nutrients are substances that nourish a plant. In particular, plants need nitrogen, phosphorus and potassium. When dissolved in water, these nutrients get absorbed by a plant’s roots.
If a plant can’t get the nutrients it needs from the soil, fertilizer can help. Fertilizer provides plants with essential nutrients and helps them grow faster.
Space to Grow
All living things need space. A plant’s roots need space so that they can spread out and absorb water and nutrients. Its leaves need space so that they access light. When plants grow too close together, they have to compete for these resources.
Without enough water, nutrients and light, plants can grow tall and thin or short and stunted. Overcrowded plants tend to be less healthy, which makes them more likely to suffer from disease.
What Does a Plant Need to Grow?
This article by BBC Bitesize, with videos and a quiz, explains why plants are important, and what they need to grow properly.
This article by Photosynthesis Education explores what's needed for photosynthesis, and what happens during the process.
References
BBC Bitesize. (n.d.). What does a plant need to grow?
Fries-Gaither, J. (2009, March). Common misconceptions about plants. Beyond Penguins and Polar Bears.
Peterson, S. (n.d.). How the closeness of plants affect growth. SFGate.
Photosynthesis Education. (n.d.). Photosynthesis for kids.
Science Learning Hub. (2013, July 30). Fertiliser.
Soil Nutrient Management for Maui County. (n.d.). Essential nutrients. University of Hawai‘i.
Tilley, N. (2019, May 30). What makes plants grow: Plant growing needs. Gardening Know How.
As an enthusiast deeply immersed in the realm of biology and educational curriculum alignment, I bring a wealth of knowledge to shed light on the intricate connections between the concepts mentioned in the provided article. My expertise spans various educational frameworks, including those from different regions, allowing me to seamlessly integrate the concepts into a cohesive understanding.
Let's dissect the article titled "Needs of Plants" to explore the fundamental elements essential for a plant's growth and survival. The article delves into the interdisciplinary nature of plant biology, aligning seamlessly with diverse curriculum standards. It draws from a plethora of sources, showcasing a commitment to robust research and accurate information.
The highlighted curriculum standards span different educational levels, emphasizing the universal importance of understanding plant biology from the foundational stages. Concepts such as "Plants and animals have observable features" (Grade K) and "Growth and Changes in Plants" (Grade 3) underscore the continuity of learning about plant life throughout a student's educational journey.
The central themes covered in the article can be categorized into the following key concepts:
-
Light:
- Plants require light for photosynthesis, a process facilitated by chlorophyll in chloroplasts.
- Different plants have varying light requirements, with some thriving in bright, direct light and others in dimmer, indirect light.
-
Air:
- Air, composed of various gases, plays a crucial role in photosynthesis.
- Plants combine carbon dioxide and water, utilizing light energy to produce glucose and oxygen.
-
Water:
- Water is essential for photosynthesis, as it is absorbed by the roots and transported to the chloroplasts in the leaves.
- Insufficient water can lead to wilting, while excess water can cause root rot.
-
Nutrients:
- Plants require specific nutrients, including nitrogen, phosphorus, and potassium, obtained from the soil.
- Fertilizers can supplement nutrient deficiencies in the soil, promoting healthy plant growth.
-
Space to Grow:
- Adequate space is vital for a plant's roots and leaves to access water, nutrients, and light.
- Overcrowding can result in competition for resources, leading to stunted growth and increased susceptibility to disease.
By addressing these concepts, the article provides a comprehensive overview of the intricate needs of plants and how they align with various educational standards. The inclusion of misconception alerts adds an educational layer, debunking common misunderstandings and fostering a deeper understanding of plant biology.
The references cited, including reputable sources like BBC Bitesize and the Science Learning Hub, reinforce the reliability of the information presented. This article serves as a valuable resource for educators, students, and enthusiasts alike, promoting a nuanced understanding of the vital role plants play in our ecosystem.