• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# To investigate the energy content of different foods.

Extracts from this document...

Introduction

Food for fuel Aim: To investigate the energy content of different foods. Introduction: We can show that food is a fuel by burning it, using this, we are going to investigate the energy content of four different foods; peanut, bread, pasta and a Brazil nut. Food is also a fuel in another sense. Plants and animals use food to get their energy. Different foods contain different types and amounts of energy. When food, and all other fuels (e.g. coal, oil, etc.), is burned, energy in the form of heat is transferred to it's surroundings warming them. The body's most basic need is for energy. To get energy it needs food as a fuel and oxygen to burn it. The amount of energy foods can produce is measured in units called calories. ...read more.

Middle

per gram Although both types of nut contain high levels of energy, they might contain less of other substances, like protein, for example. Which Bread and Pasta can provide more of. Diagram: Method: 1) Set up apparatus as shown in diagram 2) Weigh all of the foods 3) Make a note of the temperature of the water in the test tube. 4) Light the food (this may take some time with the pasta) with a bunsen burner. Remember to keep this flame away from the test tube. 5) Move the food directly under the test tube. 6) Wait until the food has completely gone out. 7) Record the temperature of the water in the test tube immediately after the food has gone out. Results: Food Experiment 1 Experiment 2 (Weight) Start Finish Start Finish (grams) Temperature (degrees Celsius) Pasta 23 40 18 57 (1.54) ...read more.

Conclusion

Evaluation: There are a number of things that could have affected the outcome of the experiment, they are as follows: a) There was a problem with getting the food samples to stay on the pin. During the time when I was replacing the food, some of the heat energy that would have been transferred into the water in the test tube would gone into the air, reducing the total amount of heat energy transferred into the Water. b) Some of the heat energy produced by the food went either through the pin, into the air or into the glass of the test tube. c) When lighting the food, some of the heat energy from the bunsen burner would have gone to heat up the water in the test tube. d) I could have inaccurately read the scale of the thermometer, although this wouldn't have mattered if I made the same inaccuracy all the time. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

## Here's what a teacher thought of this essay

3 star(s)

This is a well written report that covers a lot of sections required.
1. The report is missing an equipment list, safety and variables section.
2. The data needs to be organized into a table.
3. The conclusion is very brief and does not use the data to back up the claim.
***

Marked by teacher Luke Smithen 23/07/2013

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Energy, Respiration & the Environment essays

1. ## effect of temperature on the rate of respiration in yeast

5 star(s)

After that any higher temperature will cause chemical bonds to break and enzymes will start to denature as they will change there active site and therefore substrate will not be able to recognize its active site and no more enzyme substrate complex will be made.

2. ## An investigation into the effect of different sugars on respiration in yeast.

5 star(s)

temperature * Fill a plastic container 3/4 full with water * Place a beehive shelf in the plastic tub * Fill a burette with water (up to 50cm3) and whilst holding your finger over the end to avoid spilling water, place this inside the beehive shelf in the water.

1. ## To make sure we have plenty of energy in the future, it's up to ...

4 star(s)

Natural gas is usually found near petroleum underground. The natural gas is pumped from below ground and sent in large pipelines like the ones to the right. Natural gas usually has no odour and you can't see it. Before it is sent to the pipelines and storage tanks, it is mixed with a chemical that gives a strong odour.

2. ## Renewable and non-renewable energy sources.

3 star(s)

Advantages Disadvantages * They do not produce any greenhouse gas emissions. * They are sometimes considered as tourist attractions. * They cause vibrations, noise and visual pollution. * It costs more to produce than electricity generated from coal.

1. ## Vitamin C content in juice

o Volume of DCPIP (1cm�) The independent variable will be controlled so the results will be reliable and valid and their impact will be minimised in the experiment. I will also run a control experiment with distilled water, to show that it is the Vitamin C that is decolourising the DCPIP and nothing else.

2. ## Investigating the Effect of Temperature on Rate of Respiration in Yeast

Variations in the total time that the methylene blue and the yeast were left to react, and the time taken for me to adjust the apparatus and start and stop the stop clock. Also another source of error would be the analogue stop-clock I was using, at some points it

1. ## The Pancreas is a large gland that forms part of the Endocrine System, but ...

The acinar and duct cells both from a continuous layer, which separates the interstitial space of the pancreas. This interstitial space is the space, which is in between the cells but outside the blood stream from the lumen of the gland.

2. ## Effects of exercise on tidal volume and breathing rate

It is only the air that travels past the dead space into the alveoli that contributes to the gas exchange. As a result the alveoli ventilation is much less than the total ventilation ? and this is the volume that passes oxygen to the blood and the body beyond.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work