Everything in around us is made of chemicals. Chemicals have been obtained from the Earth and changed into more useable substances. How do people know about these chemicals? How can they be changed?
A chemical reaction happens when chemicals change into new chemicals. How do we know when a new chemical has been made? What is the evidence? How can we write this change? Can we find out and describe what is happening when a candle burns or a nail goes rusty?
Acids are well known and important chemicals. They are important in all aspects of our lives, and are used to make many other chemicals. Measuring the amount of acidity, neutralising acids, and using acids are vital to our life and health
Everything around us which is in motion can be explained because of the work done by Isaac Newton over 400 years ago. All movement requires a force. Forces cause masses to accelerate; the greater the mass the more force is required to accelerate the mass.
Why do organisms look like they do? What influences the characteristics they display? Organisms can reproduce asexually or sexually. Asexual reproduction usually allows for greater numbers to be produced, whereas sexual reproduction can sometimes result in only a few offspring, but with greater variation between members of that species. Genetics is the study of heredity, which is the tendency of offspring to belike their parents. Many famous scientists have researched heredity. Watson and Crick were scientists that came up with the DNA model that present day scientists use to make further discoveries in this area. Many people are now starting to question and discuss the biethics of current genetic research – How far should we go in our quest for knowledge?
