Year 8 - Science
Balanced diet
Diet and exercise
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers the components of a healthy diet, energy requirements, and the effects of imbalances, exercise, asthma, and smoking on the body. It also focuses on planning scientific enquiries, applying mathematical concepts, performing calculations, and basic data analysis techniques.
Lesson Summary
You will learn to describe the components of a healthy diet and how they contribute to good health.
Key Notes
- Food groups include protein, carbohydrate, lipids/fats, water, minerals, vitamins and fibre.
- Each food group plays a role in maintaining a healthy body.
- A balanced diet is needed to maintain good health.
- People need different amounts of particular nutrients at different times in their lives, depending on their lifestyle.
Vocabulary To Learn
- food group: Foods that share similar nutritional properties will be in the same food group.
- nutrient: Nutrients are essential for a healthy body and mind.
- balanced diet: A balanced diet is comprised of the right amount of each food group.
Common Mistakes To Avoid
- Proteins are the main source of energy. All fat in the diet can cause ill health.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Food groups include protein, carbohydrate, lipids/fats, water, minerals, vitamins and fibre. Each food group plays a role in maintaining a healthy body.
2. Define this scientific word and use it in context. 'food group'
Foods that share similar nutritional properties will be in the same food group. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Proteins are the main source of energy. All fat in the diet can cause ill health. Correction: Protein is used for growth of cells and repair of tissue. Fats are essential for cell membranes and as an energy store.
More Lessons In This Unit
- Energy provided by food: practical Study Guide
- Food is a source of building materials and energy Study Guide
- Good and ill health Study Guide
- Imbalanced diet: obesity Study Guide
- Imbalanced diet: starvation and deficiency diseases Study Guide
- Recovery time after exercise Study Guide
- The effects of exercise on breathing and heart rate Study Guide
- The effects of exercise on the human body Study Guide
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