Biology
What is fossil evidence and how does it support evolution?
Fossil evidence consists of preserved remains or traces of ancient organisms. It supports evolution by showing how species have changed over long periods of time, revealing transitional forms that link ancestral species to modern ones.
What is an acid?
An acid is a substance that releases hydrogen ions (H⁺) in water.
HOW mang layers on the Earth？
Earth has 4 main layers:
Crust – the thin, rocky outer layer where we live
Mantle – the thickest layer, made of semi-molten rock
Outer Core – liquid iron and nickel
Inner Core – solid iron and nickel
What is equation of caculate sppeed ？
The equation to calculate speed is:
Speed=Distance÷Time
There are several seasons in a year?
4 seasons in a year
Spring,Summer,Autumn and Winer
How does comparative anatomy demonstrate evolutionary relationships?
Comparative anatomy shows that different species share similar body structures (such as homologous organs), suggesting they inherited these traits from a common ancestor, even if the structures now serve different functions.
What is a base?
A base is a substance that releases hydroxide ions (OH⁻) in water or accepts H⁺ ions.
What different for the P-waves and S-waves of the seismic detection ?
P-waves (Primary waves) are the fastest seismic waves, traveling through solids, liquids, and gases with a compressional, back-and-forth motion, while S-waves (Secondary waves) are slower, only traveling through solids, with a side-to-side shaking motion that causes more ground damage.
what is the Newton's 2nd law?
Newton's 2nd Law of Motion states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. This law explains how the velocity of an object changes when it is subjected to an external force.
Which is a berry, strawberry or banana？
According to the botanical definition, bananas are berries, while strawberries do not belong to the category of berries. Strawberries are aggregate fruits. Their "seeds" grow from the petals rather than from the ovary like berries.
What can embryology tell us about the common ancestry of different species?
Embryology shows that embryos of different species often look very similar in early stages of development. These similarities indicate that the species share a common evolutionary origin.
How to Test for Oxygen Gas ？
1. Light a wooden splint and let it burn for a few seconds.
2. Blow it out so it is just glowing, not burning.
3. Insert the glowing splint into the test tube with the gas.
4. If the splint relights, the gas is oxygen.
what type of the interaction at plate boundaries?
At plate boundaries, tectonic plates interact in three main ways: at divergent boundaries, plates move apart, creating features like mid-ocean ridges; at convergent boundaries, plates collide, forming mountains, volcanic arcs, and deep ocean trenches; and at transform boundaries, plates slide past each other, causing earthquakes along fault lines. These interactions shape the Earth's surface over time through processes like subduction, seafloor spreading, and lateral motion.
What equation for mass and weight?
Weight=Mass×Acceleration due to Gravity
Mass=Weight÷Acceleration due to Gravity
Acceleration due to Gravity=Weight÷Mass
What is the TV drama with the highest viewership in the world？
The TV series with the highest viewership in the world is "Game of Thrones".
How do DNA and genetic similarities provide evidence for evolution?
DNA analysis reveals that organisms share many of the same genes. The more closely related two species are, the more similar their DNA sequences tend to be, supporting the idea that they evolved from a common ancestor.
Write the equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)
Hydrochloric acid (HCl) is a strong acid that completely ionizes in water to produce H⁺ and Cl⁻. Sodium hydroxide (NaOH) is a strong base that produces Na⁺ and OH⁻.
When they react, the H⁺ from HCl and the OH⁻ from NaOH combine to form water, while the Na⁺ and Cl⁻ form sodium chloride (a salt).
What is the theory of continental drift？
The Theory of Continental Drift, proposed by Alfred Wegener in 1912, suggests that the continents were once joined together in a supercontinent called Pangaea and later drifted apart over time. Evidence supporting this theory includes similar fossil records, matching geological formations, and evidence of past climates on different continents.
A car starts to accelerate from a stationary state and its speed increases from 0 m/s to 20 m/s within 5 seconds. Please calculate the acceleration of this car
Use the acceleration formula:
a=[f-i]/t
Substitute the known values:
Initial velocity i=0 m/s
Final velocity f=20 m/s
Time t=5 seconds
Calculate the acceleration:
a=[20 m/s−0 m/s]÷5s=The square of 4m/sWhat was another occupation of Gregor Mendel, the father of pea hybridization?
Mendel was not only a scientist, but also a monk at the Osbitz Monastery and held many administrative positions there.
How does the study of biogeography support the theory of evolution?
Biogeography examines where species live and how they got there. Patterns—such as unique species found only on isolated islands—show how organisms evolved differently when separated by geography.
Write the acid on base ,acids on metals and acids on carbonates equation for the reaction
1. Acid + Base → Salt + Water
2. Acid + Metal → Salt + Hydrogen
3. Acid + Carbonate → Salt + Water + Carbon dioxide
Can you explain the relationship between the Pacific Ring of Fire and subduction zones in terms of volcanic eruptions?
The Pacific Ring of Fire is a direct result of subduction zones in the region. These zones trigger volcanic activity by melting oceanic plates and producing magma that leads to the formation of volcanoes. The constant movement of tectonic plates around the Pacific Ocean keeps the Ring of Fire highly active with eruptions and earthquakes.
Give an example from everyday life that demonstrates how Newton's Third Law works in practice.
Newton's Third Law states that for every action, there is an equal and opposite reaction, meaning that when one object exerts a force on another, the second object exerts a force of equal magnitude in the opposite direction on the first object.
A common example of this in everyday life is jumping. When you push down on the ground with your legs, the ground pushes back with an equal and opposite force, which propels you upward. This is Newton's Third Law in action.
The force you apply on the ground is downward (action).
The force the ground applies on you is upward (reaction), causing you to jump.
Why is the ozone layer in Australia relatively thin？
The ozone layer in Australia is relatively thin, mainly because the region is close to the South Pole, and the phenomenon of ozone layer depletion is prone to spread to the Southern Hemisphere, especially during the ozone hole in the South Pole. In addition, the use of artificial chemical substances such as chlorofluorocarbons has increased the decomposition rate of ozone, leading to the depletion of the ozone layer. Although global measures have been taken to reduce the emissions of these harmful substances, the recovery of the ozone layer will still take a relatively long time.