Grade 6 · Science · Change over time | QuizPrint

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Grade 6 Science: Change over time QuizPrint.CA Ontario · Life Systems — use fossils and traits to explain how living things and environments change NameDateScore 1. Shell fossils are found in rock 750 metres up a mountain. What is the best explanation? 2. Which outcome is most likely when a species cannot adapt or move as its only habitat disappears? 3. Mason studies mice on dark soil. Dark fur becomes more common over 420 years. Why? 4. Scientists record that a bird species with thin beaks declines when only hard seeds remain. Birds with thicker beaks become more common. What best explains the change? 5. Which change is passed to offspring as an adaptation? 6. A species lives only in wetlands and has no dry-land traits. Over 50 years its habitat shrinks and counts fall from hundreds to dozens. What claim do the data best support? 7. Fossils in a lower layer of undisturbed rock are usually... 8. A new disease reaches a population of 392 animals. The population is more likely to survive if... 9. How is selective breeding different from the frog-and-drought example of natural selection? 10. Foxes catch the slowest rabbits for 470 years. Over many generations the rabbits... Sign in to manage students and save worksheet results. Fresh practice from quizprint.ca. Unofficial practice — not a ministry test or resource. Answer key Grade 6 Science: Change over time Ontario · Life Systems — use fossils and traits to explain how living things and environments change Question numbers match the worksheet. 1.C) that rock was once under the sea 2.D) extinction 3.D) dark mice were more likely to survive and have young 4.B) Birds with thicker beaks were more likely to survive and pass on that trait. 5.D) a bird's beak shape 6.A) Continued habitat loss puts the species at high risk of extinction. 7.B) older than fossils in the layers above 8.B) individuals differ in their traits 9.C) People choose which individuals reproduce in selective breeding. 10.A) tend to be faster Keep this page if you are printing for a child. Fresh practice from quizprint.ca. Unofficial practice — not a ministry test or resource.

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