Which plant organ transports substances up and down the plant? xylem Can a tree produce enough oxygen to keep a person alive? Trees absorb carbon dioxide through their leaves and break it down, releasing oxygen into the air. One mature tree can produce enough oxygen for up to 18 people, depending on the size and […]
Does pH increase or decrease during exercise?
Does pH increase or decrease during exercise? Exercise has many short-term (acute) and long-term effects that the body must be capable of handling for the exercise to be beneficial. In particular, exercise initiates chemical changes in the blood which, unless offset by other physiological functions, cause the pH of the blood to drop. What is […]
How do birds die from oil spills?
How do birds die from oil spills? For seabirds, oil can sink their natural buoyancy and literally drag them into a watery grave. And the birds that try to clean themselves ingest a sticky poison that ravages their livers, lungs, and intestines. Some lucky ones, however, get away with just a few smudges. How long […]
What happens when absorbed solar radiation increases?
What happens when absorbed solar radiation increases? As greenhouse gases, including carbon dioxide, increase in the atmosphere, the increase in radiative forcing results in higher surface temperatures, increased water‐holding capacity of the atmosphere, increased evaporation, and larger water vapor amounts. Why is solar irradiance increasing? Since the late 1970s, the amount of solar radiation the […]
What does it mean if a star is red shifted?
What does it mean if a star is red shifted? Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths – in other words, it is ‘red-shifted’. What […]
What is advantage and disadvantage of nuclear energy?
What is advantage and disadvantage of nuclear energy? Pros and cons of nuclear power Pros Cons Low-cost energy Environmental impact Reliable power source Water intensive Zero-carbon emissions Risk of nuclear accidents Promising energy future Radioactive waste What is the best energy source and why? Nuclear Has The Highest Capacity Factor This basically means nuclear power […]
What is a lever for Grade 5?
Can I boil food in a vacuum sealed bag?
Is 5G faster than fiber?
Is 5G faster than fiber? When 5G is established with sophisticated physical connections and the necessary infrastructure, it is likely to be much faster than fibre. 5G has anticipated speeds of 20GB download per second; 100GB upload and less than a millisecond of latency. What are the three types of fiber optic cable? There are […]