Search over 10,000 free study notes

The human heart beats around 60-100 beats per minute. Blood enters the right atrium via the superior vena cava and the inferior vena cava, the blood moves through the tricuspid valve into the right ventri...

Blood consists of cells such as red blood cells, white bloods cells and platelets and plasma. Red blood cells are important for the delivery of oxygen to the cells in the body - to enable...

When elements are heated, it causes their electrons to become excited. Electrons exist in discrete energy levels, and these energy levels are unique to each element. When the electrons are excited by heat...

The water moves into root hair cells by osmosis, as there is a high concentration of minerals/sugars in the cells, and little water. This decreases the water potential inside the cell, so water molecules ...

My biggest piece of advice would be to practice speaking your presentation with your written script in front of you at first. This way, you can focus on pronunciation, intonation, and where to pause for b...