Year 7 Science · Unit 1 · Lesson 18
Foundation Worksheet
Learning Goals
True or False? Fix the false ones
Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.
Invasive species are only a problem in Australia.
Correct it:
Habitat loss is the leading cause of species extinction globally.
Correct it:
Cane toads were accidentally introduced to Australia.
Correct it:
Climate change has no effect on species distribution.
Correct it:
Pollution only affects aquatic animals.
Correct it:
Match each term to its definition
Draw a line connecting each term on the left to its correct definition on the right. Or write the matching letter next to each term.
| Term | Your answer | Definition |
|---|---|---|
| Habitat fragmentation | A. A non-native species that spreads and harms native species in a new environment. | |
| Invasive species | B. An area with unusually high numbers of endemic species that is under serious threat. | |
| Overexploitation | C. The process by which large areas of habitat are broken into smaller, isolated patches. | |
| Pollution | D. The introduction of harmful substances — chemicals, plastics or light — into the environment. | |
| Climate change | E. Taking a species from the wild faster than it can reproduce — includes overfishing and illegal trade. | |
| Biodiversity hotspot | F. Long-term shifts in temperature and weather patterns that alter where species can survive. |
1. Name the five main threats to biodiversity covered in this lesson.
2. Why does Australia have such a high rate of mammal extinctions compared to other continents?
Wrap Up
In one sentence, what was the main idea of this lesson?