Year 8 - Science
Imbalanced diet: obesity
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 explain the effects on the human body of consuming too much food.
Key Notes
- Not consuming a balanced diet can lead to ill health.
- Body mass index (BMI) is calculated from a person's height and body mass.
- Consuming too much food can cause BMI to become too high, and lead to obesity.
- Effects of obesity on the human body.
- Obesity can increase the risk of developing other health issues, including heart disease.
Vocabulary To Learn
- BMI: Body mass index (BMI) is a measure that compares your weight and height to assess whether they are in a healthy proportion.
- obesity: When someone has a BMI of 30 or above.
- coronary heart disease: A condition in which the coronary arteries become blocked.
- type two diabetes: When a person cannot control their blood sugar levels.
Common Mistakes To Avoid
- We should not eat fat.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Not consuming a balanced diet can lead to ill health. Body mass index (BMI) is calculated from a person's height and body mass.
2. Define this scientific word and use it in context. 'BMI'
Body mass index (BMI) is a measure that compares your weight and height to assess whether they are in a healthy proportion. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: We should not eat fat. Correction: Fat makes up an important part of our diet. We use it as a store of energy and to make cell membranes.
More Lessons In This Unit
- Balanced diet Study Guide
- 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: 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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