What do plants make through the process of photosynthesis?

Plants use photosynthesis to make food (sugar) and oxygen gas.

Give an example of when a plant or animal might use energy they have stored.

When we run around or workout, we are using stored energy. Trees use stored energy when they do not have any leaves.

What is a chemical reaction? Give an example.

A chemical reaction is when you put some things together and you get something new—like when we mixed baking soda with vinegar and made gas bubbles.

Give an example of a gas and how something used it.

Gas is all around us and is called air. We need oxygen from the air to stay alive.

Give an example of how matter flows through a system.

Matter flows through a system like a food chain. The Sun makes the plant grow, then a rabbit eats the plant, and then a different animal eats the rabbit.

Where do living things get energy? What are some ways organisms use that energy?

Living things get energy from food. They use energy to move and do things. Plants need energy to grow, and all living things need energy to survive.

What is the process of photosynthesis?

Photosynthesis is the chemical process in which plants and other organisms combine carbon dioxide and water, using energy from the Sun, to produce sugar and oxygen.

What is the process of cellular respiration?

Cellular respiration is the chemical process that occurs when an organism breaks down the food it has stored (sugars and fats) and uses it for energy.

Besides plants, what are examples of other organisms that use photosynthesis?

Some bacteria, such as cyanobacteria, go through photosynthesis and so do algae.

Compare the similarities and differences between how plants and animals get the food they need for survival.

Plants and animals both need food to survive. Animals get their food from eating plants and other animals. Plants get their food by using carbon dioxide, water, and sunlight to make sugar.

Explain how scientists know the oxygen level in the atmosphere has changed because of plants. Could our atmosphere still be changing?

Scientists have studied bubbles trapped in glaciers, which showed that oxygen levels a long time ago were very low. As more photosynthetic organisms started to grow, the oxygen levels started to rise. Yes, the atmosphere is still changing because we keep putting other things in the air, like pollution.

Describe the oxygen/carbon dioxide cycle using plants and animals.

In a fishbowl, there is a fish and a plant. The fish uses oxygen from the water and releases carbon dioxide. The plant then uses that carbon dioxide, water, and sunlight to make sugar and then it releases oxygen back into the water. The gases keep getting changed over and over.

Photosynthesis & Respiration

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What you will learn from this videoWhat you will learn

Plants carry out photosynthesis to make sugar from carbon dioxide and water.
In cellular respiration, living things use sugar to produce energy.
Matter cycles in an ecosystem through photosynthesis & cellular respiration.

Discussion Questions
- Before Video
  What do plants make through the process of photosynthesis?ANSWER
  - Plants use photosynthesis to make food (sugar) and oxygen gas.
  Give an example of when a plant or animal might use energy they have stored.ANSWER
  - When we run around or workout, we are using stored energy. Trees use stored energy when they do not have any leaves.
  What is a chemical reaction? Give an example.ANSWER
  - A chemical reaction is when you put some things together and you get something new—like when we mixed baking soda with vinegar and made gas bubbles.
  Give an example of a gas and how something used it.ANSWER
  - Gas is all around us and is called air. We need oxygen from the air to stay alive.
  Give an example of how matter flows through a system.ANSWER
  - Matter flows through a system like a food chain. The Sun makes the plant grow, then a rabbit eats the plant, and then a different animal eats the rabbit.
  Where do living things get energy? What are some ways organisms use that energy? ANSWER
  - Living things get energy from food. They use energy to move and do things. Plants need energy to grow, and all living things need energy to survive.
- After Video
  What is the process of photosynthesis?ANSWER
  - Photosynthesis is the chemical process in which plants and other organisms combine carbon dioxide and water, using energy from the Sun, to produce sugar and oxygen.
  What is the process of cellular respiration?ANSWER
  - Cellular respiration is the chemical process that occurs when an organism breaks down the food it has stored (sugars and fats) and uses it for energy.
  Besides plants, what are examples of other organisms that use photosynthesis?ANSWER
  - Some bacteria, such as cyanobacteria, go through photosynthesis and so do algae.
  Compare the similarities and differences between how plants and animals get the food they need for survival.ANSWER
  - Plants and animals both need food to survive. Animals get their food from eating plants and other animals. Plants get their food by using carbon dioxide, water, and sunlight to make sugar.
  Explain how scientists know the oxygen level in the atmosphere has changed because of plants. Could our atmosphere still be changing?ANSWER
  - Scientists have studied bubbles trapped in glaciers, which showed that oxygen levels a long time ago were very low. As more photosynthetic organisms started to grow, the oxygen levels started to rise. Yes, the atmosphere is still changing because we keep putting other things in the air, like pollution.
  Describe the oxygen/carbon dioxide cycle using plants and animals.ANSWER
  - In a fishbowl, there is a fish and a plant. The fish uses oxygen from the water and releases carbon dioxide. The plant then uses that carbon dioxide, water, and sunlight to make sugar and then it releases oxygen back into the water. The gases keep getting changed over and over.
Vocabulary
- Photosynthesis DEFINE
- Cellular respiration DEFINE
- Water DEFINE
- Carbon dioxide DEFINE
- Molecule DEFINE
- Cyanobacteria DEFINE
- Reactants DEFINE
- Product DEFINE
- Chloroplasts DEFINE
- Law of conservation of mass DEFINE
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