Health and disease, Year 7: more practice：全部卡片
整套按顺序列出——孩子看到之前，您可以先通读一遍。
- What does a balanced diet contain?
The right amounts of all the nutrients, plus fibre and water
提示Think about all of them, not just one.
为什么A balanced diet gives enough of each nutrient for energy, growth and repair without too much or too little.
- A meal is only chips and fizzy drinks. Why is it not balanced?
It has too much fat and sugar and too little protein, vitamins and fibre
提示Think about what is in excess and what is missing.
为什么A balanced meal needs a mix of food groups. This one is high in energy but low in several nutrients the body needs.
- Why are fruit and vegetables important in a balanced diet?
They provide vitamins, minerals and fibre
提示Think about what fresh produce contains besides sugar.
为什么Fruit and vegetables supply vitamins and minerals that keep the body working, plus fibre to keep the gut moving.
- Regularly eating much more fat and sugar than you need can lead to which health problem?
Obesity
提示Unused energy is stored.
为什么The extra energy is stored as body fat. Obesity raises the risk of heart disease and type 2 diabetes.
- Which nutrient is a store of energy and also insulates the body?
Fat
提示Think of blubber.
为什么Fat stores more energy gram for gram than carbohydrate, and a layer under the skin reduces heat loss.
- Which mineral does the body need for strong bones and teeth?
Calcium
提示Milk and cheese are rich in it.
为什么Calcium makes bones and teeth hard. Good sources include milk, cheese and green leafy vegetables.
- Which of these is the best source of protein: an apple, an egg or a bowl of rice?
An egg
提示Protein is used for growth and repair.
为什么Eggs, meat, fish, beans and dairy foods are rich in protein.
- Which type of microbe is used to turn milk into yoghurt?
Bacteria
提示These are single-celled microbes without a nucleus.
为什么Bacteria feed on the sugar in milk and make lactic acid. This makes the milk thicken and taste sour.
- Penicillin, an antibiotic medicine, is made by which type of microbe?
A fungus (a mould)
提示Alexander Fleming noticed it growing on a petri dish.
为什么Penicillin comes from a mould called Penicillium. It kills bacteria but does not work on viruses.
- Are most microbes harmful or harmless to people?
Most are harmless or useful
提示Think of how many microbes there are compared with the number that cause disease.
为什么Only a small proportion of microbes cause disease. Many live safely on and in us, or are used to make food and medicines.
1★ KS3-BIOL-HEA-0037
2★ KS3-BIOL-HEA-0038
3★ KS3-BIOL-HEA-0039
4★ KS3-BIOL-HEA-0040
5★ KS3-BIOL-HEA-0041
6★ KS3-BIOL-HEA-0042
7★ KS3-BIOL-HEA-0043
8★ KS3-BIOL-HEA-0044
9★ KS3-BIOL-HEA-0045
10★ KS3-BIOL-HEA-0046