Food energy requirements

9.If someone eats too little food for a long time, what condition may eventually lead to death?

10.One calorie is equal to how many joules?

11.Which statement about energy requirements is correct?

12.A person's overall metabolic rate increases with which of the following?

13.Which of the following is the unit of energy used when referring to food?

14.A person's overall metabolic rate is the sum of which two components?

15.A student wants to investigate the energy content of a food sample. They burn the food under a test tube containing a known volume of water and measure the temperature rise. Which piece of equipment is essential for this experiment?

16.In an experiment to determine the energy content of a peanut, a student burns the peanut and heats 20 cm³ of water. The temperature of the water rises from 20°C to 35°C. Given that the specific heat capacity of water is 4.2 J/g°C and 1 cm³ of water has a mass of 1 g, what is the energy released by the peanut?

17.A food label shows that a chocolate bar contains 250 kcal per serving. How many kilojoules does this represent? (1 cal = 4.2 J)

18.Which of the following is a risk of obesity mentioned in the source?

19.A student conducts an experiment to compare the energy content of two different nuts. They burn each nut separately under a beaker of water and measure the temperature change. Which variable should be kept constant to ensure a fair test?

20.A food label shows the energy content per 100 g as 2000 kJ. If a person eats 50 g of this food, how much energy do they consume?

21.The average man requires 10 500 kJ per day and the average woman requires 8 400 kJ per day. What is the ratio of the man's requirement to the woman's requirement?

22.A student investigates the energy content of a biscuit using a calorimeter. They obtain a temperature rise of 12°C for 25 g of water. The biscuit mass was 2 g. Calculate the energy content per gram of biscuit (specific heat capacity of water = 4.2 J/g°C).

23.Which of the following is a reason why food labels should show the amount of each food group?

24.What is the unit of energy used when referring to food?

25.If a person eats too little food for a long period of time, what condition may eventually lead to death?

26.Basal metabolic rate is a measure of the energy content of food needed to survive when:

27.Which of the following factors does NOT affect overall metabolic rate according to the source?

28.If a food label shows an energy content of 500 kcal per serving, how many kilojoules does that represent? (1 cal = 4.2 J)

29.Which of the following is NOT a factor affecting overall metabolic rate?

30.What is the term for not eating the right amount of food or having an unbalanced diet?

31.A student burns a sample of food under a test tube containing 20 cm³ of water. The temperature of the water rises from 20°C to 30°C. The energy released by the food is calculated using the formula: energy (J) = mass of water (g) × specific heat capacity (4.2 J/g°C) × temperature rise (°C). How much energy was released?

32.A student uses a calorimeter to find the energy content of a peanut. The peanut (mass 0.5 g) is burned, heating 50 cm³ of water from 20°C to 45°C. The specific heat capacity of water is 4.2 J/g°C. What is the energy content of the peanut in kJ/g?

33.A food label shows that a serving contains 350 kcal. How many kilojoules does this represent? (1 cal = 4.2 J)

34.A person consumes a meal containing 2500 kJ. If their basal metabolic rate (BMR) is 6000 kJ per day and they do no physical activity, how much more energy do they need to consume that day to meet their BMR?

35.A food label shows the energy content per 100 g as 1500 kJ. If a person eats 60 g of this food, how much energy do they consume?

36.The average man requires 10,500 kJ per day and the average woman requires 8,400 kJ per day. What is the ratio of the man's requirement to the woman's requirement in its simplest form?

37.A student investigates the energy content of a biscuit. They burn the biscuit under 25 cm³ of water and measure a temperature rise of 12°C. The specific heat capacity of water is 4.2 J/g°C. The biscuit mass was 2 g. What is the energy content per gram of biscuit?

38.A food label shows per 100 g: energy 2000 kJ, protein 25 g, carbohydrate 60 g, fat 15 g. If a person eats 150 g of this food, how much energy and protein do they consume?

39.Which of the following is NOT a factor that affects overall metabolic rate according to the source?

40.A person consumes 2000 kJ more than their overall metabolic rate each day for a long period. What is a likely consequence?

41.Which unit is commonly used when referring to the energy content of food?

42.One calorie is equal to 4.2 joules.

43.Obesity can lead to heart disease and diabetes.

44.Basal metabolic rate is a measure of the energy needed to survive when:

45.Men generally require more food than women.

46.Match each factor to its effect on how much food energy a person needs:

47.Match each term on the left with its correct description on the right.

48.Place the following events in the correct order for a person who eats too little food over a long period.

49.Which of the following are factors that affect a person's overall metabolic rate? (Select all that apply)

50.The average woman requires more energy per day than the average man.

51.Complete the sentence:

52.The average man needs 10 500 kJ per day and the average woman needs 8 400 kJ per day. What is the ratio of the man's requirement to the woman's requirement? Give your answer in the form x:y, where x and y are whole numbers.

53.A food label shows that a serving contains 500 kcal. How many kilojoules does this represent? (1 cal = 4.2 J)

54.Complete the sentence using the correct words.

55.State two factors, other than exercise, that affect a person's overall metabolic rate.

56.The average man needs 10 500 kJ per day and the average woman needs 8 400 kJ per day. What is the ratio of the man's requirement to the woman's requirement? Give your answer in the form x:y, where x and y are whole numbers.

57.A food label shows that a serving contains 500 kcal. How many kilojoules does this represent? (1 cal = 4.2 J)