🌞 1. Photosynthesis
Process
Process
Explain how chlorophyll helps a plant use sunlight to make glucose.
Chlorophyll absorbs sunlight and transforms the light energy into chemical energy, which powers the reaction between water and carbon dioxide to produce glucose.(you must dance
Montagem Ladrao 30 second
)
Explain why a plant with yellow leaves might not photosynthesise efficiently.
Yellow leaves often mean the plant lacks magnesium. Magnesium is essential for making chlorophyll, the green pigment that absorbs sunlight. Without enough chlorophyll, the plant cannot capture enough energy for photosynthesis, so the process becomes less efficient.
What is the word equation for photosynthesis?
Carbon dioxide + water → glucose + oxygen
Explain what part of the plant absorbs water.
Roots absorb water from the soil through root hairs. Water then moves up the plant through xylem vessels to reach the leaves.
Explain how carbon enters a plant.
Plants take in carbon dioxide from the air through stomata in their leaves. The carbon atoms from CO₂ are used to make glucose during photosynthesis.
Explain why photosynthesis mainly occurs in the leaves of plants.
Leaves contain many cells with chloroplasts, which have chlorophyll. They are flat and thin, allowing light to easily reach these chloroplasts, making leaves the ideal site for photosynthesis.
Explain the role of nitrate in protein production in plants and how it affects growth.
Nitrate provides nitrogen, which plants use to build amino acids, the building blocks of proteins. Proteins are needed to form new cells. Without enough nitrate, a plant cannot grow properly, and its leaves may die, leading to stunted growth.
Explain why energy is written above the arrow in the photosynthesis equation.
Energy from sunlight is not a substance but is required to power the reaction. It’s written above the arrow to show that the reaction needs energy input to happen.
Explain how water travels from the roots to the leaves.
Water moves up through long, hollow tubes called xylem vessels, driven by capillary action and transpiration pull, eventually reaching the cells in the leaf.
Explain how animals get carbon from plants.
Animals eat plants, taking in the carbohydrates made during photosynthesis. These contain carbon atoms that originally came from the air as carbon dioxide.
Explain what would happen to glucose production if chloroplasts were only found in the roots.
If chloroplasts were in the roots, photosynthesis would be very limited or impossible because roots are underground and do not receive sunlight, which is essential for the process. Thus, glucose production would drastically decrease. (Anyway, you guys get candy)
How does using GPS technology help farmers apply fertilizers more effectively? Explain your reasoning using mineral requirements.
GPS helps farmers identify which parts of the field lack specific minerals like nitrate or magnesium. They can then apply fertilizer only where it's needed, ensuring that plants get enough nutrients for healthy growth without wasting resources or harming the environment.
Explain how removing one reactant (either water or carbon dioxide) would affect the equation and the products.
If either water or carbon dioxide is missing, the reaction cannot happen because both are needed to form glucose and oxygen. So photosynthesis would stop, and no products would be made.
Explain why veins in leaves are important for photosynthesis.
Veins contain xylem vessels that deliver water to the photosynthesising cells. Without water, the plant cannot make glucose, so veins are essential to keep the process running.(You are so lucky , I giv you 200 points additionally 1 chocolate)
Explain how respiration returns carbon to the atmosphere.
During respiration, organisms break down glucose to release energy. This process produces carbon dioxide as a waste product, which is released back into the air when they exhale.
Explain how plants can photosynthesise more on sunny days but still survive during dark nights.
On sunny days, plants make excess glucose and store it as starch. At night, when photosynthesis stops due to lack of sunlight, plants use stored starch for energy to survive and continue cellular activities.
Explain how magnesium indirectly affects oxygen production on Earth through its role in photosynthesis.
Magnesium is needed to make chlorophyll, which captures light energy for photosynthesis. Without enough chlorophyll, plants cannot produce glucose and oxygen efficiently. Therefore, low magnesium reduces photosynthesis and limits the amount of oxygen released into the atmosphere.
Explain how this equation shows that plants transform matter and energy.
Plants take matter (water and carbon dioxide) and, using light energy, change them into different forms of matter (glucose and oxygen). The process also stores solar energy in the bonds of glucose molecules, transforming light energy into chemical energy.(Unfortunietly , you loo 400 points)
Explain what would happen to photosynthesis if the air spaces in leaves were filled with water instead of gas.
Gases like carbon dioxide could not diffuse through water-filled air spaces. Without CO₂ entering the cells, photosynthesis would slow down or stop completely.
Explain why decomposers are essential in the carbon cycle.
Decomposers break down dead plants and animals, releasing carbon dioxide during respiration. This returns carbon to the atmosphere and keeps the carbon cycle going.
Explain how the structure of a leaf supports efficient photosynthesis.
Leaves have a large surface area, many chloroplasts, thin structure for easy gas exchange, and stomata that regulate CO₂ intake.
Without adding any minerals, how might a plant be green but still experience limited protein synthesis? Explain your reasoning in detail.
A plant may appear green due to sufficient magnesium and chlorophyll production, but still lack nitrates. Nitrates are essential for converting carbohydrates into proteins. So, even with photosynthesis occurring, growth is limited because the plant cannot form new proteins or cells without nitrogen.
Explain why the photosynthesis equation is considered a foundation of life on Earth.
The equation shows how plants capture energy from sunlight and create glucose, which stores energy for almost all living organisms via food chains. It also releases oxygen, which animals and humans need for respiration. Without this process, life as we know it could not exist.
If stomata were permanently closed, explain the chain reaction that would affect glucose production, oxygen levels, and food chains.
Closed stomata would prevent CO₂ from entering. Without carbon dioxide, photosynthesis would not happen. No glucose would be made, oxygen would not be released, and the energy supply for herbivores and the rest of the food chain would collapse.
Explain how fossil fuels link ancient organisms to modern carbon emissions.
Fossil fuels formed from organisms that died millions of years ago. When burned, they release the carbon those organisms had stored. This adds ancient carbon back into today’s atmosphere, increasing carbon dioxide levels and affecting climate systems. (Whether you find or not , you lose 300 points)