WorksheetsHistory of Life on Earth (pgs 38-49)
Total questions: 12
Worksheet time: 13mins
The division of Earth's history of 4.6-billion-years into manageable parts is the:
fossil
extinction
fossil record
geologic time scale
The Earth's environment has changed a lot in 4.6 billion years. Many organisms could not adapt in these conditions. When species die out, it leads to mass ________________.
fossils
extinction
evolution
adaptations
Look at the fossil record. What can scientists conclude?
Life started on land.
Life started in water.
Life started in water and land around the same time.
Life has not changed, and living things do not evolve.
The four major divisions that make up the history of Earth are the: Precambrian time, Paleozoic era, Mesozoic era and Cenozoic era.
true
false
Which division of geological time would you find these?
Precambrian
Paleozoic
Mesozoic
Cenozoic
Cyanobacteria was important 3.6 billion years as it is today, because it helps:
make carbon dioxide
release oxygen in the ocean and atmosphere
let the oceans form
The fossil record shows that life forms have changed over time. Evidence shows that life moved onto land _________ of years ago.
hundreds
thousands
millions
billions
Click and study the picture. Which is true?
Humans have been on Earth since life began.
Humans were around during the time of the dinosaurs.
Humans are a fairly new species.
Primates are a fairly new species. They evolved in the past 50 million years. Which of these are primates?
humans
apes
monkeys
All the above
Evidence shows that dinosaurs went extinct around 65 MYA when an asteroid hit the Earth. Which of the following caused the dinosaurs to become extinct?
most were hit by rocks causing instant death
massive volcanic eruptions burned most of them
giant dust clouds blocked the sun causing many plants to die, which destroyed global food webs
Click the picture. Humans share a common ancestor with gorillas and chimpanzees.
true
false
Which of the following do all primates share? Hint: you are a primate.
opposable thumb
flexible shoulders (can rotate in a circle)
binocular eyes (eyes in front of skull)
all the above
