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WorksheetsEvidence for Evolution and fossil dating
Total questions: 17
Worksheet time: 13mins
What percent of the original parent atoms remain in a rock after one half-life has gone by?
100%
75%
50%
25%
Most elements exist in more than one form. Each form must have the same number of protons. This is what makes them the same element. But - they can have different numbers of neutrons. Often, heavier forms are radioactive and lighter forms are stable (Carbon-14 versus Carbon-12). These different forms of the same element are called ___.
isoforms
isotopes
sister forms
DeWolfium has a half-life of 1.5 billion years. It decays into Starckium. If a rock has a ratio of DeWolfium to Starckium of 1:3, how old is the rock?
1 billion years
2 billion years
3 billion years
4 billion years
Why is it important that scientists use zircon crystals when doing uranium to lead radiometric dating?
When zircon crystals are formed, they can only incorporate Uranium, and not Lead -So the scientists know how much Uranium there was to start with.
When zircon crystals are formed, they can only incorporate Lead , and not Uranium -So the scientists know how much Lead there was to start with.
Zircons are a girl's second best friend.
Uranium is dangrous, and the zircons protect us all.
Carbon 14 loses ________ to make Nitrogen 14
a Neutron
A Proton
A Quark
a neutrino electron
Identify the image. How does this image provide evidence for evolution?
Homologous structures show that even animals from different species have the same basic structure, suggesting they may share one common ancestor.
Homologous structures show that animals for different species have a variety of different structures, suggesting that each has a different ancestor.
Analogous structures show that bones length plays a vital role in the evolution of various species.
Analogous structures show that the same basic bone structure may be used in a variety of different functions.
How does the study of embryology provide evidence for evolution?
Even for species that look very different as adults, many species look very similar as embryos, suggesting they may share one common ancestor.
The variety in embryo structure and form suggests that their are many different ancestors for each distinct type.
All organisms must undergo an embryo stage of development. This suggests some degree of relatedness between species.
Embryology shows that organisms that appear similar as embryos will also share the same similarities as adults.
A scientist is studying the evolutionary relationship between two species. He gets DNA and amino acid samples from various organisms of each species and analyzes them. Which type of evolutionary evidence is the scientist using?
Fossil
Anatomical
Biochemical
