"The release of energy in food" PPT download

Description

"The release of energy in food" PPT download

Part One: Situation Import

The relationship between exercise and heart rate

What is the significance of increased heart rate and accelerated breathing during exercise?

question

1.Does food really contain energy? Do different foods contain the same amount of energy?

2. How to determine the energy in food under in vitro conditions?

3. Where is the energy in food released in the human body? How to release?

4. How do cells in the human body obtain oxygen?

learning target

1. Learn the basic methods of measuring the energy stored in food, and explain the commonalities and differences in the nature of combustion and respiration.

2. Explain that energy comes from the oxidative decomposition of organic matter in cells, and explain the essence and significance of respiration.

3. Through demonstration, learn how to detect oxygen and carbon dioxide.

PPT on the release of energy in food, Part 2: Exploring Topic 1

energy stored in food

1. Food caloric value: The energy released when each gram of food is fully burned outside the body.

Formula: Food caloric price = energy released (KJ)/food quality (g)

Reflects the amount of energy stored in a food with a mass of one gram.

Explore the energy stored in food

The energy in food can be released outside the body through ( ). 100g of water needs to absorb 4.187 joules (J) of energy to increase the temperature by 1°C. The energy in food can be measured and calculated by measuring the heat released by a certain amount of food to a certain amount of water ( ).

1. In the formula, what does food quality mean? How can this mass be measured or calculated? What are your methods? How many methods are there?

2. In the formula, how is the released energy obtained? If energy is released by burning, how much energy is released? How do you measure or calculate?

(1) Make an energy measuring instrument

hint:

What issues should be paid attention to when selecting materials for the device? ( )

Functionally speaking, what do you need to pay attention to when making a device. ( )

(2) Determine the energy in food

2. Different foods do contain varying amounts of energy, and the energy in food can be released in certain ways under specific conditions. The nature of food burning is:

The process of decomposing ( ) in food into ( ) and ( ) under the conditions of ( ) and releasing ( ) at the same time.

PPT on the release of energy in food, Part 3: Exploring Topic 2

Cells release energy through respiration

1. Respiration: The process in which organic matter such as glucose is oxidized and decomposed in the cells of an organism and releases energy.

2. Essence: Decompose organic matter and release energy.

3. Significance: Respiration provides power for life activities.

Keywords: Free download of Biology PPT courseware for seventh grade volume 2 of Beijing Normal University Edition, PPT courseware on the release of energy in food, .PPT format;

For more information about the PPT courseware "Energy Supply of the Human Body and the Release of Energy from Food", please click the "Energy Supply of the Human Body ppt Release of Energy from Food" ppt tag.

"The Release of Energy in Food" PPT free download:

"The Release of Energy in Food" PPT free download Part 1: Learning objectives 1. The essence and significance of respiration. 2. Methods to detect oxygen and carbon dioxide. Important and difficult points 1. Key points: the essence and significance of respiration. 2. Difficulty: Detecting oxygen and dioxide...

"The Release of Energy in Food" PPT teaching courseware:

"The Release of Energy in Food" PPT teaching courseware Part One: Situation Introduction Where does the energy we need for life activities mainly come from? Learning objectives 1. Learn the basic methods of measuring food energy, and explain the commonalities and differences in the nature of combustion and respiration..

"The Release of Energy in Food" PPT courseware download:

"The Release of Energy in Food" PPT courseware download Part One: Course Knowledge Points Knowledge Point 1 Energy is stored in food 1. Explore the difference in energy stored in different foods (1) Make a simple calorimeter. There are two issues to pay attention to when determining the production plan,...

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Update Time: 2024-10-04

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 2 industry PPT template

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