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Why is Earth known as a dynamic planet?

The Earth is a dynamic planet that has been constantly changing since it came into being. Driven by powerful convection cells inside the Earth, continents drift, giving rise to earthquakes, volcanoes and mountain ranges.

What does Dynamic Earth mean?

Dynamic Earth is an interactive Web site where students can learn about the structure of the earth, the movements of its tectonic plates, as well as the forces that create mountains, valleys, volcanoes, and earthquakes. Learning about the earth is an important topic for students of all ages.

Whats does dynamic mean?

1a : marked by usually continuous and productive activity or change a dynamic city. b : energetic, forceful a dynamic personality. 2 or less commonly dynamical / dī-​ˈna-​mi-​kəl / a : of or relating to physical force or energy. b : of or relating to dynamics (see dynamics entry 1)

Is the Earth static or dynamic?

Earth is a Dynamic Planet Since the Earth’s beginning about 4.5 billion years ago, natural climate and environmental conditions on our planet have been in constant flux.

What are the 5 systems of earth?

Five parts are called the geosphere, hydrosphere, atmosphere, cryosphere, biosphere.

How is a dynamic planet?

Our Earth is a dynamic planet, as clearly illustrated on the main map by its topography, over 1,500 volcanoes, 44,000 earthquakes, and 170 impact craters. These features largely reflect the movements of Earth’s major tectonic plates and many smaller plates or fragments of plates (including microplates).

Is the surface of the earth static?

Despite our tendency to consider Earth as static, it is actually a dynamic and ever-changing planet. Wind, water, and ice erode and shape the land. Volcanic activity and earthquakes alter the landscape in a dramatic and often violent manner.

Are earthquakes fast or slow?

Some changes are fast and immediately observable, such as earthquakes, volcanoes, flooding, and landslides. Other changes are slower and occur over a longer period of time, such as weathering and erosion. These gradual processes shape landforms with water, ice, wind, living organisms, and gravity.

How and why is the Earth constantly changing?

Our restless Earth is always changing. Tectonic plates drift, the crust quakes, and volcanoes erupt. Air pressure falls, storms form, and precipitation results. Learn how these powerful forces shape our air, land, water, and weather—and constantly transform our planet.

What is a slow person?

A slow person is someone who understands things slower than the average person. Or someone who is not fast in the mind. What you can learn from slow people. Slow people don’t need the rush to find what they want. They love being in nature much more.

What is fast change?

Fast changes are the changes that happens in matter of seconds or few minutes, which may be or may not be seen by us as they happen that quickly, here are some examples- •Burning of paper. •Burning of candle. •Earthquakes.

Which is the fastest reaction?

The fastest possible conscious human reactions are around 0.15 s, but most are around 0.2 s. Unconscious, or reflex, actions are much faster, around 0.08 s because the signal doesn’t have to go via the brain.

Which is the fastest chemical reaction?

Ultra-fast Chemical Reaction that Turns Graphene into Semiconductors. German and US scientists recently reported an unusual feat: they observed the world’s fastest chemical reaction, during which hydrogen atoms bind onto and then leave a sheet of graphene, all within ten quadrillionths (10^-14) of a second.

Is burning a fast or slow reaction?

Chemical reactions that complete in a very short time, such as less than 10 -6 seconds, they are called fast reactions. Examples: Magnesium ribbon is burnt in the flame of Bunsen burner; it quickly gets combusted with a noticeable spark. Similarly, a neutralization reaction between acids and bases is a fast reaction.

Why do most reactions slow down in time?

Reactions usually slow down as time goes on because of the depletion of the reactants. The rate constant, or the specific rate constant, is the proportionality constant in the equation that expresses the relationship between the rate of a chemical reaction and the concentrations of the reacting substances.

What are fast reactions?

A fast reaction is therefore best defined as one whose half-life is less than a few seconds (that is, of the same order as the human response time or the mixing time for reactants) at room temperature using conventional reactant concentrations (say 0.1 mol dm -3). They invariably involve free-radical reactions.

Why must particles collide before reacting?

Molecules must collide in order to react. In order to effectively initiate a reaction, collisions must be sufficiently energetic (kinetic energy) to break chemical bonds; this energy is known as the activation energy.

Which best explains why sawdust burns more quickly?

Which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions? The pressure of oxygen is greater on the sawdust. More molecules in the sawdust can collide with oxygen molecules. Oxygen is more concentrated near the sawdust than the block of wood.

What are the three requirements for an effective collision?

For collisions to be successful, reacting particles must (1) collide with (2) sufficient energy, and (3) with the proper orientation.

What makes a collision favorable and unfavorable?

When a reaction is kinetically unfavorable ( kobs is small), it is slow, but when a reaction is thermodynamically favorable, it is spontaneous ( ΔGrxn<0 ). The poorer the participants are at colliding, the fewer the collisions, and the slower the reaction.

How can you slow down a chemical reaction?

To slow down a reaction, you need to do the opposite. Factors that can affect rates of reactions include surface area, temperature, concentration, and the presence of catalysts and inhibitors. Temperature – Changing the temperature of a chemical reaction also affects the reaction rate.

What are the limitations of collision theory?

The following are the drawbacks of collision theory.

  • This theory does not advance any explanation for the abnormally high rates that are observed sometimes.
  • This theory cannot be applied to reversible reactions with complete success.

What 4 things affect the rate of reaction?

Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

Does pH affect rate of reaction?

Optimal pH increases enzyme rate of reaction while less than optimal pH decreases it. Increasing temperature also increases enzyme rate of reaction, until things get too hot, then the enzyme denatures and ceases to function.

What are the 5 factors that affect the rate of reaction?

We can identify five factors that affect the rates of chemical reactions: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.