hemisphere

Everyday

1. Half of a sphere (a ball shape). tree →
2. Half of the Earth: the Northern Hemisphere and the Southern Hemisphere (divided by the equator), or the Eastern and Western Hemispheres. tree →
3. One of the two halves of the brain (left hemisphere, right hemisphere). tree →

In the lessons

In geography, the equator splits the Earth into the Northern Hemisphere (USA, Canada, UK, Ireland) and the Southern Hemisphere (Australia, New Zealand); seasons are opposite, so when it is summer in one, it is winter in the other. In maths, a hemisphere is a 3-D shape: half a sphere, with one flat circular face and one curved face. In science, the brain has two hemispheres. Phrases: Northern Hemisphere, Southern Hemisphere, left/right hemisphere.

Examples

• Australia is in the Southern Hemisphere. tree →
• Canada and the UK are in the Northern Hemisphere. tree →
• When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere. tree →
• The equator divides the Earth into two hemispheres. tree →
• A hemisphere has one flat face and one curved face. tree →
• Cut an orange in half and you have two hemispheres. tree →
• The brain has a left and a right hemisphere. tree →

Note

«Hemi-» means half, so hemisphere = half a sphere. Maths: a hemisphere has 2 faces (1 flat circle, 1 curved), 1 curved edge and 0 vertices. Its volume is half that of the whole sphere.