Think back to what you have previously learned about chemical reactions. Starting materials called reactants are used in chemical reactions. The atoms from those reactants are pulled apart and put back together in new ways to form new substances. Those new substances that are created in chemical reactions are called products. The format of a chemical equation uses the left side to represent the reactants and the right side to represent the products, with an arrow in the middle to signify the chemical change that takes place. Consider the following chemical equation for photosynthesis.

Question

6CO2+6H2O--->C6C12+6O2
(Carbon diox+water---->glucose+oxygen gas)

when photosynthesis occurs, ______ and _____ are starting materials. Starting materials are called ______. The ending materials formed are ____ and ______. Ending materials are called _____.

Answer 1

When photosynthesis occurs, carbon dioxide (CO2) and water (H2O) are the starting materials. Starting materials are called reactants. The ending materials formed are glucose (C6H12O6) and oxygen gas (O2). Ending materials are called products.

Answer 2

6CO2+6H2O--->C6C12+6O2
(Carbon diox+water---->glucose+oxygen gas)

11a. Imagine you are conducting a lab investigation with a plant that grows in water. You get aquarium water and a few sprigs of the plant from an aquarium shop. You put the container with the plant and the water in bright light and observe it for a week. At first, you see bubbles forming. What must those bubbles be?

carbon dioxide gas

carbon dioxide gas

hydrogen gas

hydrogen gas

glucose sugar

glucose sugar

oxygen gas

Answer 3

The bubbles you observe forming in the container with the plant must be oxygen gas. During photosynthesis, plants take in carbon dioxide and water, using light energy to convert these into glucose and oxygen. The oxygen is released as a byproduct, which is what you see as bubbles in the water.

Answer 4

11c. What process have you been observing?

decomposition

sedimentation

cellular respiration

photosynthesis

Answer 5

The process you have been observing is photosynthesis. During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen using light energy, which is why you see bubbles of oxygen gas forming in the water.

Answer 6

12a. Drag and drop the numbers into the table to show how many atoms of each type are represented on each side of the photosynthesis reaction.

photosynth: 6CO2+6H2O--->C6C12+6O2

Cellular resp:C6C12+6O2 --->6CO2+6H2O

Answer 7

To count the number of atoms of each type on both sides of the photosynthesis reaction and the cellular respiration reaction, we can analyze the compounds involved.

Photosynthesis: 6CO2 + 6H2O → C6H12O6 + 6O2

Left Side (Reactants):

• C (Carbon): 6 from 6CO2 (each CO2 has 1 C)
• H (Hydrogen): 12 from 6H2O (each H2O has 2 H)
• O (Oxygen): 18 from 6CO2 (each CO2 has 2 O) + 6 from 6H2O (each H2O has 1 O) = 12 O + 6 O = 18 O

Right Side (Products):

• C (Carbon): 6 from C6H12O6
• H (Hydrogen): 12 from C6H12O6
• O (Oxygen): 6 from C6H12O6 + 6 from 6O2 = 6 O + 6 O = 12 O

Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O

Left Side (Reactants):

• C (Carbon): 6 from C6H12O6
• H (Hydrogen): 12 from C6H12O6
• O (Oxygen): 6 from C6H12O6 + 12 from 6O2 = 6 O + 12 O = 18 O

Right Side (Products):

• C (Carbon): 6 from 6CO2 (each CO2 has 1 C)
• H (Hydrogen): 12 from 6H2O (each H2O has 2 H)
• O (Oxygen): 12 from 6CO2 (each CO2 has 2 O) + 6 from 6H2O (each H2O has 1 O) = 12 O + 6 O = 18 O

Summary Table

| Atom Type | Photosynthesis (Reactants) | Photosynthesis (Products) | Cellular Respiration (Reactants) | Cellular Respiration (Products) | |-----------|-----------------------------|----------------------------|-----------------------------------|----------------------------------| | C | 6 | 6 | 6 | 6 | | H | 12 | 12 | 12 | 12 | | O | 18 | 6 | 18 | 12 |

Now, you can fill in the numbers in the table for each side of both equations based on this analysis.

Answer 8

13. Identify the organisms as producers or consumers.

frog =

grasses =

rabbit =

snake =

Answer 9

In an ecosystem, organisms can be classified as producers or consumers based on their roles in the food chain:

• Producers: Organisms that produce their own food, typically through photosynthesis (e.g., plants).
• Consumers: Organisms that cannot produce their own food and rely on consuming other organisms for energy.

Based on this classification:

• Frog = Consumer (Frogs are typically carnivorous and eat insects and small animals.)

• Grasses = Producers (Grasses photosynthesize to produce their own food.)

• Rabbit = Consumer (Rabbits are herbivores that consume plants, including grasses.)

• Snake = Consumer (Snakes are generally carnivorous and eat other animals, such as rodents, birds, or frogs.)

So, to summarize:

• Frog = Consumer
• Grasses = Producer
• Rabbit = Consumer
• Snake = Consumer

Answer 10

what types of consumers are the frogs, rabbits and snakes?

Answer 11

Consumers can be further categorized based on their dietary habits:

1. Frog:

   • Type: Carnivore (or Insectivore)
   • Explanation: Frogs primarily eat insects, small invertebrates, and sometimes small vertebrates, making them carnivorous (or more specifically insectivorous).

2. Rabbit:

   • Type: Herbivore
   • Explanation: Rabbits primarily eat plants, including grasses, vegetables, and fruits. They are herbivores since their diet consists of plant material.

3. Snake:

   • Type: Carnivore
   • Explanation: Snakes are generally carnivorous, feeding on other animals such as rodents, birds, reptiles, and amphibians. Their diet consists entirely of meat.

To summarize:

• Frog: Carnivore (Insectivore)
• Rabbit: Herbivore
• Snake: Carnivore