Grade 9 · Science · Unit 10 of 10
Evolution & Selection
Variation, adaptation and how populations change over time.
What your child practises
Practises variation, adaptation, natural and artificial selection, mutations, the evidence for evolution from fossils and rock layers, and how new species can form.
Manitoba Curriculum learning outcome: SCI.9.E.19, SCI.9.E.20, SCI.9.E.23, SCI.9.E.24, SCI.9.E.25, SCI.9.E.26, SCI.9.E.27, SCI.9.E.28 · mutations, adaptation, evidence for evolution, natural and artificial selection
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Which came first on Earth?
- single-celled organisms
- flowering plants
- mammals
Show answer
single-celled organisms
Hint: Simple life appeared billions of years before complex animals.
Question 2
A trait that helps an organism survive and reproduce in its environment is called an…
- adaptation
- accident
- mutation only
Show answer
adaptation
Hint: Adaptations make an organism better suited to its environment.
Question 3
Fossils give evidence of evolution because they…
- are alive today
- are made in laboratories only
- show what organisms looked like long ago
Show answer
show what organisms looked like long ago
Hint: Layers of rock show a record of changes over time.
Question 4
Camouflage in an animal is an adaptation that helps it…
- grow faster
- be louder
- avoid being seen
Show answer
avoid being seen
Hint: Camouflage is helpful for predators and prey alike.
Question 5
If a climate becomes colder, the selective pressures on a population of animals will…
- stay exactly the same
- change
- disappear
Show answer
change
Hint: Different traits may help in the new conditions.
Question 6
Scientists estimate the age of rocks using…
- counting grains of sand
- radiometric dating
- guessing from colour
Show answer
radiometric dating
Hint: Radioactive elements decay at steady, known rates.