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WorksheetsUnit 1 Enviro
Total questions: 25
Worksheet time: 13mins
The period of feeding for sea snails on a coastal rock platform would be most influenced by the
Time of day
Time of tides
Season
Food available
Carbon is an integral part of an ecosystem. It cycles in ecosystems. Carbon is directly involved in which of the following processes:
Photosynthesis only
Photosynthesis and respiration
Photosynthesis and transpiration
Respiration and transpiration
An isolated eucalyptus tree supports a large population of insects, which are food for small birds. These birds are prey for owls. The diagram that best represents this relationship is:
The four main processes of the hydrologic cycle are:
Evaporation, transpiration, condensation and vaporisation
Precipitation, condensation, transpiration and evaporation
Transpiration, evaporation, precipitation and vaporisation
Condensation, circulation, precipitation and transpiration
Consider the biosphere and the stratosphere. Choose the answer that best describes their interaction.
The stratosphere contains ozone, which protects the biosphere from harmful UV rays
The biosphere obtains oxygen from the stratosphere for respiration
The stratosphere is where all weather originates
The stratosphere is important in nutrient cycles, upon which the biosphere depends
Considering the phosphorus cycle, it is reasonable to state that phosphorus enters ecosystems by:
Cellular respiration
The weathering of rocks
Being absorbed by soil bacteria from the atmosphere
Moving into the leaves of plants as gaseous phosphorus
Flow of nutrients through the components of the environment is described as a
Biogeochemical cycle
Hydrological cycle
Stratigraphic cycle
Krebs cycle
The above diagram shows a simplified system. What word would be best suited in place of the letter ‘X’?
System
Output
Input
Process
Which of the following best describes a population?
A community of organisms and the environment they inhabit and interact with
The biotic and abiotic surroundings of an organism
A group of organisms of the same species living in a defined area
A number of interacting populations within a defined area
Which of the following best describes an ecosystem?
A community of organisms and the environment they inhabit and interact with
The biotic and abiotic surroundings of an organism
A group of organisms of the same species living in a defined area
A number of interacting populations within a defined area
Considering the nitrogen cycle, it is reasonable to state that:
The only form of nitrogen available to plants is nitrates in the soil
Plants are able to fix atmospheric nitrogen
Nitrogen is available to plants in the form of amino acids from the action of decomposers in the soil
There has been a steady increase of atmospheric nitrogen over the last few decades that has contributed to global warming
The sun releases enormous amounts of solar energy through the process of:
respiration
nuclear fusion
nuclear fission
photosynthesis
The troposphere is:
The layer of the atmosphere that contains the ozone layer
The highest layer of the atmosphere
The least dense layer of the atmosphere
The layer of the atmosphere where the greenhouse effect occurs
After a volcanic eruption the first organism seen to grow after the lava cooled was a species of cactus called the Lava cactus. Which of the following is true?
Lava cactus is the pioneer species in the processes of primary succession
The only plant that would be present at this location in 20 years is the Lava cactus
Growth of the Lava cactus follows the processes of zonation
The series of changes expected to occur is an example of secondary succession
Evidence of the theory of plate tectonics and continental drift is provided by:
Changes in the rate of rotation of the Earth
Similarities in the fossils found in Australia and Antarctica
The presence of mineral deposits in Australia and South Africa
The direction of flow of ocean currents in the southern hemisphere
The rocks in the lithosphere are classified into three major groups based on their origin. Rocks that have been altered by heat, pressure and chemical change within the earth’s crust are called:
Igneous
Extrusive
Sedimentary
Metamorphic
Short-tailed shearwaters depart each autumn from Southern Australia on their 15,000km migratory journey to the North Pacific Ocean. They return the following spring to the same burrow to raise their young. Such migrations are an example of:
Circadian changes
Nocturnal changes
Seasonal changes
Circatidal changes
According to the graph
Fires never occur in rainforests.
Mixed forests occur in areas that were burnt 400 years ago.
Sclerophyll forests are best suited to fires every 200 years.
Heathlands would contain many fire-adapted plants.
In areas that are have not been burnt for at least 350 years, the most common vegetation type is
Heathland.
Sclerophyll forest.
Mixed forest.
Rainforest.
Species X can be referred to as:
I and III only
I and II only
I, II and III
II and III only
Which of the following is a true statement?
This graph demonstrates that the higher the water temperature the more oxygen is dissolved.
This graph demonstrates that the lower the water temperature the more oxygen is dissolved.
This graph demonstrates that the water temperature will have an effect on the organism in the water.
This graph demonstrates that fewer organisms will survive at 30 °C than at 5 °C
A relationship where both organisms benefit is:
Parasitism
Commensalism
Mutualism
Competition
A fish living in a fresh water lake is influenced by biotic and abiotic factors. Select the appropriate factors affecting such a fish.
dissolved oxygen and photosynthetic algae
pH and temperature
decomposers and mineral ions in solution
photosynthetic algae and decomposers
Which of the soil particles is smallest in size?
Silt
Sand
Gravel
Clay
A soil that contains 30% sand, 40% silt and 30% clay would be:
loam
clay
silt loam
clay loam
