What is Eon in time? Eon, Long span of geologic time. In formal usage, eons are the longest portions of geologic time (eras are the second-longest). Three eons are recognized: the Phanerozoic Eon (dating from the present back to the beginning of the Cambrian Period), the Proterozoic Eon, and the Archean Eon. How do I […]
Why is solid liquid and gas important?
Why is solid liquid and gas important? Solids, liquids and gases are three states of matter. It is important to understand the particle nature of matter. The particles that make up matter are not ‘small bits of solid’ or ‘small drops of liquid’ but atoms and molecules. The physical characteristics of those atoms and molecules […]
Does Sulphur burn in air?
Does Sulphur burn in air? Answer: Sulphur when burnt in air forms SO2. Sulphur reacts with oxygen as it burns in the presence of oxygen, producing Sulphur dioxide, which is acidic in nature. What happens when Sulphur reacts with oxygen Class 8? sulfur + oxygen → Sulfur burns in oxygen to form sulfur dioxide. Is […]
Which is good effect of friction?
Which is good effect of friction? Advantages of Friction: Friction is responsible for many types of motion. It helps us walk on the ground. Brakes in a car make use of friction to stop the car. Asteroids are burnt in the atmosphere before reaching Earth due to friction. What happens when friction increases? Friction causes […]
Which is the oldest additive manufacturing techniques?
Which is the oldest additive manufacturing techniques? Additive manufacturing first emerged in 1987 with stereolithography (SL) from 3D Systems, a process that solidifies thin layers of ultraviolet (UV) light‐sensitive liquid polymer using a laser. The SLA‐1, the first commercially available AM system in the world, was the precursor of the once popular SLA 250 machine. […]
Where do plant cells get their energy?
Where do plant cells get their energy? Energy Cycle in Living Things Both animal and plant cells contain mitochondria and plants have the additional energy factories called chloroplasts. The chloroplasts collect energy from the sun and use carbon dioxide and water in the process called photosynthesis to produce sugars. Why do plants grow better in […]
What does the fine adjustment knob move?
What does the fine adjustment knob move? It moves the eyepiece up and down quickly, to get the thingy you’re trying to look at roughly (or, ahem, “coarsely”), in focus. Then you use the fine adjustment knob to get the focus perfect. It is usually the larger knob on the side of the microscope, and […]
What are the two groups into which the Jovian planets are classified?
What are the two groups into which the Jovian planets are classified? Due to difference in their structure and composition, the four gas giants are often differentiated, with Jupiter and Saturn being classified as “gas giants” while Uranus and Neptune are “ice giants”. How do you classify planets? There are four main categories of classifications […]
What would happen if Earth stopped spinning?
What would happen if Earth stopped spinning? If the earth stops spinning suddenly, the atmosphere will continue to spin. This means very high speed winds, i.e., approximately 1,670 Km/hr which is earth’s rotational velocity. The winds will also cause erosion to the earth’s crust. What would happen if a massive asteroid hit the sun? The […]
What is a point mutation give an example?
What is a point mutation give an example? Point mutation is the mutation that affects a single nucleotide or nucleic acid. Sickle cell anemia: It is caused by single point mutation in the beta haemoglobin gene. This results in the conversion of GAG codon into GUG that encodes amino acid valine. What is mutation and […]