Earth's climate has changed due to ice ages, volcanic eruptions, asteroid impacts, the Sun's cycle, and global warming.
There is no 'periodic' change in the earths orbit. The orbit is elliptical and over time (a great many years) becomes less so.
They do this by a really simple 'process' known as Observation; this involves measurement of parameters over Time and many Calculations.
the composition of ice cores
Such is known as its climate.
The crust will start to freeze and causes the earth to rotate really fast
Yes, repeatedly.
how big they are
They have been slowly declining over time because they decay, eventually becoming stable isotopes of other elements.
Yes. Plant pollen tells us what kind of plants were growing there at that particular time. The kinds of plants then give us an indication of what the climate was then. So we can see if the climate has changed over time.
water
There is no 'periodic' change in the earths orbit. The orbit is elliptical and over time (a great many years) becomes less so.
They do this by a really simple 'process' known as Observation; this involves measurement of parameters over Time and many Calculations.
the composition of ice cores
Such is known as its climate.
No; Time may seem Short, yet it is millions - and tens of millions - and hundreds and even thousands of millions of Years of Time that 'make an Earth.'
mammals have evolved and that climate has changed rapidly like grass, grass wasn't around in the time of the dinosaurs.
how the anemometer changed over time