Ecology is the study of the relationships of living things with one another and their environment. A habitat is a place where a plant or animal lives, e.g. woodland or rocky seashore. The environment is everything surrounding an organism. A food chain is a chain showing how organisms are linked… Continue Reading →
Matter is anything which has mass and takes up space. There are three states of matter, solid, liquid, and gas. Solid – definite shape, definite volume, does not flow. Particles vibrate only. Liquid – no definite shape, definite volume, can flow. Particles slide over each other. Gas – no shape, no definite volume, can be compressed…. Continue Reading →
Photosynthesis Green plants make food by photosynthesis. Photosynthesis occurs in the leaves of a plant. The green chemical chlorophyll is needed for photosynthesis. Chlorophyll traps light energy and uses it to combine carbon dioxide and water. This forms glucose and oxygen. Leaves have air spaces between their leaves called stomata. The three things needed for… Continue Reading →
Digestion The five stages of digestion are ingestion, digestion, absorpbtion, assimilation and egestion. Ingestion is the taking of food into the mouth. Digestion is the breaking down of food. Absorpbtion is the absorpbtion of molecules of food into the blood in the small intestine. Assimilation is the taking of food molecules from… Continue Reading →
Energy – Is the ability to do work, Energy is measured in joules. Potential energy – Stored Energy. Kinetic Energy – The energy that moving things have. Heat energy – Energy that causes a change in temperature between materials. Hydro-electric energy – Electric energy from water. Geo-thermal energy – energy… Continue Reading →
The Skeleton and Muscles The functions of the skeleton are support, protection and movement. Muscles are attached to bones. When they contract they alow us to move. Bone is made of living cells. and calcium compounds The living part of the bone lays down the non-living part. All vertebrates have… Continue Reading →
absorption – passing of digested food into the bloodstream in the small intestine. acid rain – rain water with a ph of less than 5.5.acid rain damages the roots of trees and causes fish kills. aerobic respiration – respiration where oxygen is used word equation of aerobic respiration – glucose+oxygen-energy+water+carbon… Continue Reading →
The Circulatory System The circulatory system consists of the heart and the blood vessels (veins, arteries and capillaries). Veins bring blood away from the heart. They have a wider lumen and thinner walls than arteries, and valves to prevent backflow of blood. Arteries carry blood away from the heart. they… Continue Reading →
Volume – How much space an object takes up Speed – The distance travelled by an object in one unit of time Centre of gravity of an object – Is a point in the object through which all the weight of the object appears to act. Pressure – Is the… Continue Reading →
Electrons – Negatively charged particles Protons – Have a positive charge Neutrons – the particles of the nucleus that have no charge Hydrogen bond – Attraction between a slightly positive hydrogen atom and a slightly negative atom. Covalent bond – A chemical bond formed when two atoms share electrons Ionic… Continue Reading →
