Why does an octopus have 9 brains? Octopuses have 3 hearts, because two pump blood to the gills and a larger heart circulates blood to the rest of the body. Octopuses have 9 brains because, in addition to the central brain, each of 8 arms has a mini-brain that allows it to act independently. Do […]
What are fundamental movement skills and why are they important in physical development?
What are fundamental movement skills and why are they important in physical development? Fundamental movement skills are very important to a child’s physical development. When confident and competent in these skills, children can develop sport-specific and complex movement skills. These skills allow children to enjoy sports and physical activities. What are fundamental movement skills examples? […]
How do plants mainly take in nitrogen?
How do plants mainly take in nitrogen? Plants absorb nitrogen from the soil as both NH₄⁺ and NO₃⁻ ions, but because nitrification is so pervasive in agricultural soils, most of the nitrogen is taken up as nitrate. Plants with roots restricted by compaction may show signs of nitrogen deficiency even when adequate nitrogen is present […]
Do humans have free will?
Do humans have free will? At least since the Enlightenment, in the 18th century, one of the most central questions of human existence has been whether we have free will. In the late 20th century, some thought neuroscience had settled the question. However, as it has recently become clear, such was not the case. What […]
How much uranium 235 is needed for an atomic bomb?
Does AM or FM have a higher frequency?
What is a part of an experiment not being tested?
What is a part of an experiment not being tested? Controls or Controlled Variables A part of the experiment that is not being tested and is used for comparison of the experimental results. A control group should be used when conducting an experiment. How do scientists test their hypothesis? Scientists (and other people) test hypotheses […]
What describes something in nature without explaining it?
What describes something in nature without explaining it? Unlike a theory, a scientific law describes an observed pattern in nature without attempting to explain it. A hypothesis is a possible explanation for a set of observations or answer to a scientific question. How do you know if a claim is scientific? To evaluate the scientific […]
What are the similarities and differences between replication and transcription?
What are the similarities and differences between replication and transcription? Both DNA replication and Transcription involve the generation of a new copy of the DNA in a cell. DNA transcription is involved in replicating the DNA into RNA, while the DNA replication makes another copy of DNA. Both the process is involved in the production […]
What is the movement of the surface of the water?
What is the movement of the surface of the water? Surface movement includes rivers, streams, creeks, lakes, ponds, and human-made “flood” control. All surface water is trying to reach sea level due to gravity. As water flows in channels, the streambed and banks of the channel will resist the flow of water. Who has the […]