Unit 3 Area of Study 1 — The science of food
Which nutrient makes nuts a suitable alternative to meat within the Australian Guide to Healthy Eating, and what is one function of that nutrient?
Protein, which supports growth, tissue maintenance or tissue repair
What practical barrier does a kitchen timetable address for students sharing one kitchen?
Competing access to preparation space and equipment, giving each student a predictable opportunity to prepare meals.
Which criterion examines whether a weight-loss product achieves the results it promises?
Effectiveness of the product.
Explain how a campaign displaying the sugar content of sweetened drinks could raise public awareness.
It makes the amount of sugar visible and understandable, helping consumers recognise how these drinks contribute to their sugar intake.
What is one environmental benefit of composting straw used as bedding in chicken production?
It diverts organic waste from landfill.
Explain why increased energy needs during pregnancy support a recommendation for more serves of grain foods.
Grain foods provide carbohydrate for energy, helping support the developing baby and changes in the mother’s body.
Explain how preparing and sharing Australian native foods can promote connectedness within Aboriginal communities.
It brings people together through shared food practices, strengthening relationships and community bonds.
A weight-loss company supplies testimonials but no scientific studies. What evidence is needed to establish the product’s effectiveness?
Credible scientific research on the actual product demonstrating that it achieves the claimed outcome.
Consumers become more aware of sugar in sweetened drinks and demand lower-sugar options. Identify one possible response by food manufacturers.
Reformulate drinks to contain less sugar or develop additional lower-sugar products. Accept either.
A household purchases a fruit and vegetable box. Identify one nutrient this could add to their diet and explain how it supports physical health.
Fibre supports bowel regularity, helping prevent constipation.
A 16-year-old is recommended more serves of lean meat and alternatives than a four-year-old. Identify one nutrient supplied by this group and explain the adolescent’s greater requirement.
Protein: adolescence involves rapid growth and development, increasing the amount needed to build and maintain body tissues.
Also accept iron, linked to increased blood volume and growth.
A child regularly eats packaged pumpkin snacks during enjoyable movie nights. Explain how conditioning could make those snacks more appealing than steamed pumpkin.
Repeatedly pairing the snacks with an enjoyable experience creates a learned positive association, increasing the child’s desire for the snacks.
A short social media video repeatedly presents a food as fashionable and desirable. Explain one way this presentation could influence viewers’ food choices.
Repeated exposure can make the food appear popular or socially desirable, encouraging viewers to purchase or consume it.
Explain why a consumer concerned about animal welfare might pay more for food from an ethical producer.
The consumer values humane treatment of animals and is willing to pay more to support production practices consistent with that value.
Explain how choosing to buy from an accredited farmers’ market can demonstrate food citizenship.
It is an informed purchasing action that supports local producers and participation in the local food system.
Explain how regularly consuming more energy than the body uses can increase the risk of type 2 diabetes
Excess energy can be stored as body fat. Excess body fat can contribute to insulin resistance, increasing the risk of type 2 diabetes.
A retiree eats cake at a regular social gathering despite feeling full. Explain how the social setting can encourage overconsumption.
Social expectations or a desire to participate can encourage eating despite fullness, adding food beyond hunger or energy needs.
A study of diet and brain volume involved adults aged 40–65. State one limitation when applying its findings to children.
Children were not represented in the study, so the findings cannot automatically be generalised to them.
Explain how turning damaged vegetables into edible powders makes better use of resources already invested in food production.
The vegetables remain in the food supply, so the water, land and energy used to grow them are not wasted. Using them may also reduce demand for additional raw ingredients.
Vegetables are processed into powders on the farm instead of being transported to a factory. Explain two positive environmental effects of removing that transport journey.
Less fuel combustion reduces greenhouse gas emissions; reduced fuel use conserves fossil-fuel resources.
Regularly eating hot dogs and doughnuts may displace nutritious foods. Explain how this displacement could affect mental health.
It may reduce intake of nutrients needed for normal brain function. Poor overall dietary quality can therefore adversely influence mood and mental wellbeing.
An organic vegetable box is expensive and needs refrigerated storage. Explain how income and accommodation could each discourage its purchase.
Income: limited money makes the higher price difficult to afford.
Accommodation: limited refrigerator or storage space makes the produce difficult to store and use.
A study uses self-reported food diaries and finds an association between healthier diets and larger brain volumes. Identify two limitations: one concerning the diaries and one concerning the conclusion.
Food diaries may contain recall errors or inaccurate reporting.
An association does not establish that diet caused the difference in brain volume.
Workers move between vegetable farms. Explain how disinfecting their footwear can improve environmental sustainability.
Disinfection reduces the transfer of pests or pathogens, helping prevent crop losses and the waste of resources invested in growing those crops.
Require: The action → reduced spread → environmental benefit.
Aboriginal representation in the food system is low. Explain one ethical concern about the commercial sale of Australian native foods and how it could influence a consumer’s purchase.
Concern about businesses profiting from Aboriginal knowledge without fair recognition or benefits may encourage purchasing from Aboriginal-owned producers or businesses that share benefits fairly.