Matching terms: types of energy and systems 0001

Define, in your own words, what energy is and write two examples of systems; one with kinetic energy and other with gravitational potential energy. Match the terms to these two groups (letter-number):

a) Combustion of diesel ; b) Friction between a match and sandpaper ; c) A bee flying ; d) A plane that took off a minute ago ; e) A pole when is completely bent.

1) Kinetic energy ; 2) Elastic potential energy ; 3) Mechanical energy ; 4) Chemical energy ; 5) Internal energy

Biomes: true or false 0001

Decide if these sentences are true or false. Be careful because each mistake discounts a right answer:

a) Intraspecific relationships occur between individuals of the same species.

b) Interspecific relationships occur between individuals of the same species.

c) Biotic factors are the variables of a biotope or physical environment that affect living things.

d) The chemical composition of the soil is a biotic factor because plants absorb water and mineral salts from it.

e) An ecosystem consists of a biotope, a biocenosis and the interactions between the biotope and the organism that live in it.

f) Predation is a type of interspecific relationship in which a predator feeds on a prey.

g) Family is a type of interspecific relationship and it is formed of, at least, one male and female of the same species and the offspring.

h) Symbiosis consists in two or more individuals from different species living closely together in a competition relatioship.

Conversion of units 0001

a) Normal body temperature is 37 ºC. Express this value in K.

b) If an object has a temperature of 354 K, what is its temperature in Celsius scale?

Energy transformations 0001

What type of energy is involved in each of the following situations?

a) Wood is burning in the fire.

b) A radio station is broadcasting its usual programme. Waves are coming out of its antenna.

c) An MP3 is playing.

Definition of energy 0001

Define, with your own words, what energy is. Explain three different types of energy.