photosynthesis: Green plants trap light from the sun and use it to convert carbon dioxide and water into food.Plants take in light through their leaves.
Independent variable: the one thing that is changed in a experiment. When testing an experiment to see if low temperatures affects fruit growth the independent variable would be different kinds of fruit.
Virus: a small infection agent that reproduces only inside the cells of other living organisms. People are just one many that can be affected by viruses.
Trait: a physical characteristic of an organism. The environment also plays a big role in how traits are shown hair can lighten or skin can darken in the sun.