The more atmosphere you are peering through, the more stars (or planets) appear to twinkle. Read below why stars twinkle, but planets do not. Chart by AstroBob. Used with permission. Stars twinkle, while planets (usually) shine steadily. Why? Stars twinkle because they’re so far away from Earth that, even through large telescopes, they appear only as pinpoints. And it’s easy for Earth’s atmosphere to disturb the pinpoint ... Xem chi tiết
Why is sodium kept immersed in kerosene oil?
Sodium, a highly reactive metal, is stored immersed in kerosene oil to prevent it from reacting with moisture and oxygen in the air. This practice is crucial in handling sodium safely and preserving its properties for various applications. Sodium, a silvery-white metal, is known for its high reactivity with water and air. To protect it from these reactions, sodium is stored in kerosene oil. Let's delve into the reasons behind ... Xem chi tiết
Concepts of Biology – 1st Canadian Edition
For more complex organisms, diffusion is not efficient for cycling gases, nutrients, and waste effectively through the body; therefore, more complex circulatory systems evolved. Most arthropods and many mollusks have open circulatory systems. In an open system, an elongated beating heart pushes the hemolymph through the body and muscle contractions help to move fluids. The larger more complex crustaceans, including lobsters, ... Xem chi tiết
“The Selfish Giant” by Oscar Wilde: Summary, Meaning, and Questions
“The Selfish Giant” is a short story for children by Oscar Wilde. Wilde lived a complex and controversial life but, like the Giant in his story, Wilde had a conversion to Christianity late in life. He wished to be baptized and received into the Church on his deathbed in 1900. He wrote this Christian fable for children while his own two sons were very young. You can read The Selfish Giant online here. The Selfish Giant ... Xem chi tiết
Why Should Curd and Sour Substances Not Be Kept in Brass and Copper Vessels?
In many cultures, the use of brass and copper utensils is associated with tradition and even health benefits. However, not all foods are compatible with these metals, especially acidic substances like curd, lemon, or tamarind. You may have heard elders advising against keeping curd and other sour foods in copper or brass containers, and there’s good reason behind this age-old wisdom. Storing such substances in these metals can ... Xem chi tiết
3.2: The Basic Structural and Functional Unit of Life- The Cell
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Pomeranians: What’s Good About ‘Em, What’s Bad About ‘Em
The AKC Standard says the Pomeranian is "inquisitive by nature... cocky, commanding, and animated." That he is. Vivacious and spirited, bold and brash, the typical Pomeranian thinks he's "hot stuff." This sharp-eyed busybody likes to check out every sight, sound, and activity - and tell you what he thinks about it. He is delightfully alive and aware of everything going on around him. Keenly alert to approaching strangers, the ... Xem chi tiết
NCERT Solutions for Class 9 English Beehive Chapter 8 – Reach for the Top
NCERT Solutions for Class 9 English Beehive Chapter 8 - Reach for the Top are provided here to download in PDF. You will get here the question and answers for both parts of the chapter: Part I - Santosh Yadav and Part - ll Maria Sharapova. You will get here the most reliable answers for all questions given in the NCERT Class 9 English Beehive Chapter - 8. These NCERT Solutions are the best to complete your homework assignments ... Xem chi tiết
Biosphere
The biosphere is made up of the parts of Earth where life exists. The biosphere extends from the deepest root systems of trees, to the dark environment of ocean trenches, to lush rainforests and high mountaintops.Scientists describe Earth in terms of spheres. The solid surface layer of Earth is the lithosphere. The atmosphere is the layer of air that stretches above the lithosphere. The Earth’s water—on the surface, in the ... Xem chi tiết
‘We cannot rest’ until child labour is eliminated, ILO chief tells UN conference
The strong call for urgent action at the conference taking place in Durban, aims to combat an uptick in the numbers of children being forced into work. Latest figures indicate that 160 million children - almost one in ten worldwide - are still being affected. Furthermore, numbers are on the rise, with the pandemic threating to reverse years of progress, as child labour becomes a bigger scourge in particular among the ... Xem chi tiết