• 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
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9

# Heat loss from animals

Extracts from this document...

Introduction

Saira Hamid 11CM BIOLOGY COURSEWORK Heat loss from animals Investigation: To investigate heat loss from animals. Aim: To find out how body size affects the rate of heat loss. Background: The way heat is transferred from the animal to its surroundings can be done in three ways, convection, conduction and radiation. Convection: hot gases expand and become less dense, therefore rise and are replaced by cooler gases this is called the cooling affect. This happens in animals with less body coverings. Where the environmental temperature has a greater difference to that of the animal. Conduction: is when molecules transfer heat vibrating and passing on the vibration. This occurs when the animal is in direct contact with a surface, so the vibration molecules are passed from the animals' feet to the surface it is in contact with. Radiation: there are no molecules are involved in this type of heat transfer, so therefore the heat is transferred by waves. Some animals such as the polar bear, which lives in arctic conditions, has had to adapt in its environment, because it has to decrease the amount of heat loss and instead conserve the heat. ...read more.

Middle

3) Walk around the lab sensibly considering that other students are also doing an experiment. 4) Use a heatproof mat to put the gauze and Bunsen and other hot apparatus down on it. 5) Make sure all loose hair is tied back due to using Bunsen's. Diagram: Method: 1) Pour some tap water into a beaker with a thermometer. 2) Heat this until it reaches about 36�C because temperature rises once heat is take away. 3) Take away the Bunsen and wait until the temperature rises to 40�C. 4) Pour this into a test tube starting with the smallest and working your way up to the largest. 5) After each minute has gone record the temperature of the water and record the results in a result table like the one in the preliminary work. Results: Experiment 1: Time (min) Test tube 1 Temperature (�C) Heat loss (�C) Test tube 2 Temperature (�C) Heat loss (�C) Test tube 3 Temperature (�C) Heat loss (�C) 0 40 0 40 0 40 0 1 34 6 36 4 37 3 2 32 8 33 7 35 5 3 31 9 31 9 34 6 4 30 10 30 10 32 8 5 28 12 29 11 31 9 Experiment 2: Time (min) ...read more.

Conclusion

I also think that my results are reliable because I have not got any anomalous results and if it was not reliable this would have shown up in my graphs and results. But the only thing I would improve is maybe do the experiment for 10 min and see what happens and where does the temperatures start getting constant. I know that my experiment was a fair test because I repeated it twice and the results were all very similar there was not any that really had a major difference amongst them. My experiment turned better than I expected it to so I was really pleased with the out come. I think that the accuracy of this experiment was maintained very well and I did this by: 1) Making sure that the thermometer was always at the same degree each time we placed it into a test tube 2) Reading the measurements of the thermometer at eyelevel. 3) Taking readings more than once and tallying up the average. The experiment can be extended by also investigating other factors that could affect heat loss, such as the environmental temperature, body covering and also behavioural. You could take any one of these and compare how it is related to the body size of the organism. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Living Things in their 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

4 star(s)

****
A good account of the investigation. A little more detail in the method would have been useful and there is a lack of clarity about what the independent and dependent variables actually are.

Marked by teacher Adam Roberts 30/07/2013

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 GCSE Living Things in their Environment essays

1. ## Taxonomy is the branch of biology that deals with the identification and naming of ...

5 star(s)

On the other hand anaerobic bacteria can burn up things such as methane and they can oxidise sulfur molecules and hydrocarbons to get their energy. They may live in mud where there is no oxygen. Bacteria are also classified according to their staining properties.

2. ## A2 Biology Coursework -Investigation into the effect of different concentrations of antibiotics on the ...

4 star(s)

2ml of antibiotic solution together with the bacteria culture solution poured this into a cuvette 13. I placed this cuvette in the colorimeter with the clear side of the cuvette facing towards the light and calibrated it. I did this calibrating so that I only gained the value for the

1. ## In this experiment, mung bean seedlings and Brine shrimp eggs were used to study ...

4 star(s)

In this experiment, the different salinity of water solution is prepared by dissolving different amount of sodium chloride salts in water. Mung beans seedlings are chosen to be used in this experiment to measure the rate of development of plants.

2. ## Measurement of the vitamin C content of fruit juices

3 star(s)

* Syringe with needle on it * DCPIP solution * 5 samples of fruit juice * Safety goggles Fair test: Make sure when reading the syringe that you read it the correct way up each time. If it reads 0.4 when you have finished than this is now much liquid is left.

1. ## explain why Antarctica is so special and therefore why we need to protect it, ...

Being one of the worlds most used energy resource; coal is going to be in great demand. The coal was formed along the coasts of Antarctica between 35 and 55 million years ago when Antarctica was covered in swamps. There is speculation to whether or not there is actually Petroleum in Antarctica or not.

2. ## An Investigation To Observe the Preferred Habitat of common rough woodlice.

Degrees of freedom = 2 - 1= 1 Conclusion The result of the chi-squared test was 8.464. When this figure was compared against a table of ???values with 1 degree of freedom it was shown that the figure fell below the level of significance of 0.05 therefore, the null hypothesis is rejected.

1. ## Movement in Plants and Animals.

STRUCTURE AND FUNCTION OF THE SKELETON IN MAN The skeleton in Man is a rigid structure formed from bone and cartilage. As is other vertebrates it is located within the body and is termed an endoskeleton (Arthropods have an exoskeleton which covers the body.)

2. ## Should animals be kept in captivity ?

How do we expect the weaker animals to survive long enough to reproduce, when we imprisons their strongest hope? Not only it is cruel, it is also damaging the ecosystem of Mother Nature all around the world. Another criterion is health problems caused by captivity.

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