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Radioactive or radiometric dating allows us to estimate the Earth's age by giving us the actual age of rock within a range of several million years. Radiometric dating is based on the scientific law of radioactive decay and the half-life of radioactive elements. Uranium and some other elements decay into lead over time at a specific rate. Knowing the content of these elements in the makeup of a rock allows its age to be calculated. Currently, the oldest rocks of Earth origin are estimated to be over 4 billion years old.
Tiara Lebsack
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How do tree rings and ice core help scientist understand how earth has changed overtime?
They allow us to "know" (calculate - estimate [it depends]) what conditions were like at a known time in the past.
What does the tilt of the earth do for us?
it gives us the power of time and if there was no rotation of the earth there is no movement and if there is no movement there is nothing living on earth so there would be no us thats why the rotation of the earth is so important!
What is on the surface of earth?
On the Earth there is life basically such as organisms like us and animals.
The motion of the earth that gives us night and day is called?
The revolution of Earth gives us day and night. This is when the Earth rotates on its axis, changing the time of day, as well as the seasons.
How does mining help us to understand the interior of the earth?
Mining helps us to understand the interiors of the earth because we can learn about how long the earth has been around and about different kinds of dirt.
How can nuclear harm us?
By radioactivity which causes damage to the body and can cause cancer if enough is absorbed. Nuclear power plants do not normally emit more than trivial amounts of radioactivity, but rare faults can allow more to escape into the surrounding areas.
Where is does energy coming from if the Conservation of energy tells us that energy cannot be created or destroyed Clearly energy is required for radioactivity to occur?
Energy coming to the earth and radioactivity are not same. Energy comes mostly from the sun and other parts of space. The energy of radioactivity is already bound up inside of the atom.
How do tree rings and ice core help scientist understand how earth has changed overtime?
They allow us to "know" (calculate - estimate [it depends]) what conditions were like at a known time in the past.
Is it true or false that Earthquakes permit us to see the structure of the Earth's interior?
It is true that seismic waves from earthquakes allow us to interpret the structure of Earth's interior.
What does gravity allow us to do on earth?
If it wasn't for gravity, the Earth itself wouldn't have formed! It would be little bits of matter all strewn throughout the universe.
Why does the revolution of the earth around the sun allow us to see predictable patterns?
becouse it happens in a patterns
What is the force that is responsible for the radioactivity that allows us to make nuclear power and atomic bombs?
There are two forces responsible for radioactivity: the Strong nuclear force and the Weak nuclear force.
What type of power plant most exposes us to radioactivity coal or nuclear plants?
nuclear plants because the fission reaction releases lots of radioactive particles causing radioactivity..
Where can gravity can be found?
Gravity can be found everywhere on Planet Earth, the force that keeps us on the ground and doesn't allow us to fly is called gravity.
Is the iodine-131 from the Chernobyl disaster is still a threat to us today?
You can only say, 23 years later, I-131's radioactivity almost decreases to 1/8 of original radioactivity.
Do you have 75 percent of water around us?
I think it is said that ~70% of the earth's surface is water. 75% is close enough an estimate
Why does Erathosthenes measurement tell us the Earth is spherical to a good approximation?
Eratosthenes found out that shadows were not consistent at the same time of day in different places. He reasoned that the Earth must be a sphere to allow this.
