Dosier Energy And Life. Biology And Geology

11.Energy and life
How much do you know? (Pag. 140)
1.Look at the photographs and answer the questions.
* In which photograph is energy being used? Used 2.
* What is the fuel used byorganisms? The first photography used food, the second used the gasoil.
* Define ‘energy’ briefly. The capacity for vigorous activity.
* Which activity in the two photographs gives off most heat? Acar.
* If a vehicle breaks down, can tou change any of the pieces to make it work? Yes
* If an organism falls ill, can you change any of its organs cure it? Yes.
2. Of the following words,which are related to organisms obtaining energy?
* Mitochondrion
* Sunlight
* Mineral salts
* Protein
* Food
* Lipid
* CO2
* Photosynthesis
Think about this question.(Pag. 141)
* Does this picture show a solution or a mixture? It is a mixture. Why? Because it is easy to distinguish.
* Do cells need energy to function? How do they get it? Carbon, water,mineral salts, immediate components.
Think about this question. (Pag. 142)
* What differences can you see in how machines and organisms use energy? The movement, growth, reproduction, heat.
Do youremember? (Pag. 143)
1.Give an example of each one of the vital processes.
* Reproduction: asexual
* Interaction: run
* Nutrition: eat food
* Growth and change: adolescence
*Growth: flaccidity
2.Look in a dictionary to find the meaning of the following words:
* Waste: residus
* Food: menjar
* Matter: matèria
* Energy: energia
Can you explain? (Pag. 143)3.In what process do you use more energy, going up stairs or sleeping? Going up stairs.
4.How is energy is obtained from matter? Eating.
5.A red blood cell lives for approximately 15 days, and as itdies it makes new red blood cells so that a constant number is maintained. Calculate how many red blood cells our body makes in two months, if we have 25 billion red blood cells in our blood stream....