Carrying out a research project can be a Herculean endeavor – the first step to succeed is establishing your research questions, goals, and methodologies. These essential choices will have a massive impact on not only the research process, but most probably the results as well. What are the factors that can influence a research project? Types of research: quantitative vs. qualitative...
There are over eight billion tons of plastic in our world today. And, more and more are produced every day. But, what actually are plastics? And how is plastic made? We’ve got the information you need. Read on to learn how plastic is made. What Are Plastics? First, you need to understand what plastics are. Plastics are materials that come from different polymers. This makes them easy...
An estimated 90% of Earth’s population has access to electronics and other sources of EMF. “Electro and Magnetic Fields” are measured by the amount of electricity and radiation in a specific location or habitable space. EMF readings and their importance are still a bit controversial in the science world, but millions of people across the globe claim to be negatively affected by...
The reactivity series ranks metals by how readily they react. More reactive metals displace less reactive metals from their compounds and react with water. The reactivity series of metals The reactivity series of metals is a chart listing metals in order of decreasing reactivity. In general, the more reactive a metal is: the more vigorously it reacts with other substancesthe more easily it loses...
Polygons are multi-sided shapes with different properties. Shapes have symmetrical properties and some can tessellate. Types of angle There are 360° in a full turn, 180° in a half turn and 90° in a quarter turn. A quarter turn is called a right angle. A right angle is shown by a small square. This fact can be used to calculate unknown angles. Angles at a point and on a straight line Angles at a...
Survival of an organism depends on its ability to respond to changes in the environment. The nervous system allows fast acting but short lived responses. Responding to changes in environment Organisms need to detect and respond to changes in their internal and external environment. This is because the conditions inside our body must be carefully controlled for it to function effectively and...
Population structure means the ‘make up’ or composition of a population. Looking at the population structure of a place shows how the population is divided up between males and females of different age groups. Population pyramids Population pyramids show the structure of a population by comparing relative numbers of people in different age groups. Population structures differ markedly...
An ionic compound is made up of charged particles, called ions. It has a giant lattice structure with strong electrostatic forces of attraction. Forming ions An ion is an atom or group of atoms with a positive or negative charge. Ions form when atoms lose or gain electrons to obtain a full outer shell: metal atoms lose electrons to form positively charged ionsnon-metal atoms gain electrons to...
The Group 7 elements are known as the halogens. They are reactive non-metals and are always found in compounds with other elements. Chlorine, bromine and iodine are all halogens. Group 7 – the halogens The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table. Chlorine, bromine and iodine are the three common Group 7...
Blood is pumped away from the heart at high pressure in arteries, and returns to the heart at low pressure in veins. The human circulatory system is a double circulatory system. The circulatory system has three main components: BloodBlood vesselsThe heart It has two main functions: Transportation of substancesProtection against disease Blood components The main blood components are:...