Starter quiz
- Which food groups provide us with energy?
- Carbohydrates ✓
- Fats ✓
- Minerals
- Proteins
- Vitamins
-
- Which foods are high in fat?
- apple
- butter ✓
- cheese ✓
- oil ✓
- bread
-
How much energy (kcal) is in 100g of this cereal?- '385' ✓
- How much energy (kcal) is in a 30g portion of this cereal?
- '116' ✓
- The apparatus we use to heat things in the lab in called a ______ burner.
- 'Bunsen' ✓
- What pieces of information must be included on a food label by law?
- Energy ✓
- Fat ✓
- Salt
- Vitamins
-
Exit quiz
- Who is correct?
Sam: A mean is an average calculated from repeated measurements. ✓
Laura: A mean is where you take the best result and use this as your answer.
Izzy: A mean is the highest result that you get.
Jun: A mean is calculated from a single measurement.
- Which food provides the most energy?
- The amount of energy provided by different foods can be investigated and compared by ______ them.
- 'burning' ✓
- How is temperature change calculated?
- by finding the mean
- final temperature − initial temperature ✓
- initial temperature − final temperature
- by repeating the experiment
-
- Which is the correct equation for calculating the amount of energy provided by food?
- mass of water × temperature change × 4.2 ✓
- mass of water × temperature change
- mass of water × temperature change ÷ 4.2
-
- Calculate the energy provided by burning food that heated water with a mass of 10 g and caused a temperature change of 23 °C.
- '966' ✓
Worksheet
Loading worksheet ...
Presentation
Loading presentation ...
Video
Lesson Details
Key learning points
- Different foods provide different amounts of energy.
- The amount of energy provided by different foods can be investigated and compared by burning them.
- Burning foods can heat water and the temperature change of the water measured.
- The mean temperature change can be calculated from repeat measurements.
- Energy provided by the food (J) = mass of water (g) x rise in temperature (°C) x 4.2
Common misconception
Control variables make it a fair test.
Control variables need to be kept the same to make the investigation valid.
Keywords
Temperature change - The difference in the starting and end temperature of a substance.
Mean - An average of several measurements, which is calculated by adding them up and dividing by the number of measurements.
Mass - The amount of matter in an object.
Variable - A variable is a factor that can be varied or measured in a science experiment.
+