A scientist would use, C. Weather Balloon.
Gas exchange in humans is the delivery of oxygen lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs.
3. C6H12O6
4. Organic compounds are compounds made up of carbon that are typically linked to hydrogen (H), oxygen (O) and/or nitrogen (N). Glucose has C, H and O which makes it (and any other carbohydrate) organic.
5. Sugar (glucose) is in a lot of foods - bread, rice, pasta, potatoes....
6. On the label it will have the number of calories in the food (per serving!) - this is how much energy there is in that amount of the product.
