science

1. system

1.1. Our body parts

1.2. Digestive system : Mouth, Gullet,Stomach,Small intestine,Large intestine Muscular system:Muscle Skeletal system:Skull,Ribs ... Circulatory system:3 types of bloodstreams Respiratory system:Heart,Lungs,windpipe

2. energy

2.1. Light energy,heat energy

2.1.1. eg. from sources of light:Sun,fireflies...

2.1.1.1. light is reflected

3. matter

3.1. solid

3.1.1. stone

3.2. liquid

3.2.1. water

3.3. gas

3.3.1. oxygen