Year 7 Science – Living Systems: Ecology 1
Practise naming biotic and abiotic factors, classifying producers, consumers and decomposers, reading food chains, and explaining why Australian species become extinct. 20 questions. 25 minutes.
Which of these is an abiotic factor in a forest ecosystem?
Which organism in an Australian bushland ecosystem is a producer?
What is the original source of energy for most ecosystems?
Choose the word that completes each blank.
Plants make their own food by 1, using light, water and carbon dioxide. Soil supplies plants with water and 2.
Blank 1: respiration · photosynthesis · decomposition
Blank 2: glucose · protein · minerals
Circle 3 words in the sentence below.
Click all the abiotic factors in this list.
sunlightemurainfallgrasswindfungi
Fungi grow on a fallen log in a forest. What is the role of the fungi in the ecosystem?
Choose the word that completes each blank.
Water, temperature and soil are 1 factors in an ecosystem, while fungi and bacteria are 2 factors.
Blank 1: abiotic · biotic · natural
Blank 2: trophic · abiotic · biotic
Which food chain has its arrows pointing in the correct direction?
Circle 1 word in the sentence below.
Click the primary consumer in this food chain.
algae→tadpole→fish→heron
Use the food chain grass → kangaroo → dingo. Choose the word that completes each blank.
The kangaroo is a 1 consumer and the dingo is a 2 consumer.
Blank 1: primary · secondary · tertiary
Blank 2: primary · secondary · tertiary
Use the feeding table. Which organism is the secondary consumer?
| Organism | What it eats |
|---|---|
| Wheat | Makes its own food |
| Mouse | Wheat |
| Snake | Mouse |
| Hawk | Snake |
Which statement about decomposers in a food web is correct?
A heatwave and a shortage of eucalyptus leaves both affect koalas. Which line classifies them correctly?
Read the data, then choose the word that completes the blank.
Day: Mon, Tue, Wed | Maximum temperature (°C): 24, 38, 41 | Koalas seen drinking: 2, 9, 15. The data show that the number of koalas seen drinking 1 as the temperature rises.
Blank 1: decreases · stays the same · increases
Choose the word that completes each blank.
At each step in a food chain, some energy is lost as 1. Matter such as carbon is 2 through the ecosystem.
Blank 1: light · heat · sound
Blank 2: cycled · used up · turned into energy
Which statement about energy and matter in an ecosystem is correct?
The Tasmanian tiger is extinct and the last known one died in 1936. Which cause contributed to its loss?
Choose the word that completes the blank.
The lesser bilby became extinct in the 1950s, partly because introduced 1 hunted it.
Blank 1: cane toads · carp · cats and foxes
Circle 2 words in the sentence below.
Click the two introduced species in this list.
foxeswombatsrabbitsemusbilbies
Read the data, then choose the word that completes the blank.
Year: 1900, 1920, 1940 | Rabbits in a region (thousands): 10, 200, 900 | Native grass cover (%): 80, 55, 30. The data show that as the rabbit population grew, native grass cover 1.
Blank 1: decreased · stayed the same · increased