Evolution
How old is the Earth
4.543 billion years
What is natural selection
The process in nature by which, according to Darwin's theory of evolution, only the organisms best adapted to their environment tend to survive and transmit their genetic characters
The molten rock that sits below the earth's surface is called what
Magma
What are genes
Genes are small units of DNA, which contain instructions for how to make proteins. A chromosome contains many genes.
What is the difference of relative and absolute dating
absolute dating is based on calculations of the age of rock strata based on half lives of minerals, relative dating is based on the assumed age of fossils found in the strata and the laws of super imposition.
How long ago did dinosaurs exist
65 million years ago
What causes natural selection
Four general conditions necessary for natural selection to occur are: More organisms are born than can survive. Organisms vary in their characteristics, even within a species.Differences in reproduction and survival are due to variation among organisms.
Which is larger the highest point on Earth or the deepest point in the ocean floor
the deepest point in the ocean
What are mutations?
Mutations are permanent changes to the DNA. While some mutations cause disease, many other mutations do not impact health.
How is relative dating and absolute dating used together
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it
How long ago did humans become human
five million and seven million years ago
What is natural selection easy definition
Natural selection is a central concept of evolution. Natural selection is the process where organisms with favorable traits are more likely to reproduce.
How is a Igneous rock formed
Igneous rock is formed through the cooling and solidification of magma or lava.
How do scientists figure out what gene controls a trait
Scientists compare DNA from people (or animals!) with different versions of the trait, to figure out what piece of DNA is correlated with the trait.
How do we determine relative age
Superposition of rock units is a very simple and straightforward method of relative age determination. The principle states that in a sequence of undeformed sedimentary rocks the oldest beds are at the bottom and the youngest ones are at the top.
How long has life existed on Earth
about 4.54 billion years
What is another name for natural selection
evolutionary theory
How is a sedimentary rock formed
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension.
Why don't identical twins look the same?
Identical twins look slightly different, even though they have identical DNA. Small differences in their environment, life, and experiences can make a big difference! This includes things like diet, exercise, sleep, sun exposure, and more
Who discovered absolute dating
Ernest Rutherford
How long does evolution take
about one million years
What does natural selection depend on
Natural selection depends on the environment
How is a metamorphic formed
Metamorphic rocks are created by the physical or chemical alteration by heat and pressure of an existing igneous or sedimentary material into a denser form.
Why can't genetic tests predict all diseases
Some diseases are hard to predict because they are caused by a lot of different genes along with environmental influence. These are known as "complex diseases."
How do we determine the absolute age of rocks
The age of a rock in years is called its absolute age. Geologists find absolute ages by measuring the amount of certain radioactive elements in the rock. When rocks are formed, small amounts of radioactive elements usually get included