Physical Science Flashcards
Cellular Respiration
A chemical reaction that breaks down the sugar into carbon dioxide, water, and energy for the body.
Three major chemicals that are used by your body are…
Proteins, fats, and carbohydrates
Decomposition
A process of recycling.
Decomposers
Organisms that break down nitrogen compounds and other complex chemicals in the waste into simple compounds.
Scavengers
Animals that eat dead animals.
Methods for replacing the nutrients in the soil.
Burning, fallow, fertilizer
Hydroponics
A type of farming (which plants are attached to some sort of supporting framework and the roots are bathed in a water solution.)
Pesticides
Chemicals used to control insects and other pests that might damage crops.
Fungicides
Chemicals that kill fungi.
Herbicides
Chemicals that kill unwanted plants (weeds).
Organic farming
Farmers grow their crops without the use of any artificial chemicals.
Genetic engineering
A method that scientists are developing to help avoid the use of so many chemicals.
Genetic modification
It makes some crop plants more resistant to herbicides so only the weeds will be killed.
Pharmaceuticals or Medicines
Some helpful chemicals
Herbs
Were the first plants to be used for healing purposes (medicine)
