Podcast
Questions and Answers
What is the role of chlorophyll in photosynthesis?
What is the role of chlorophyll in photosynthesis?
Animals can make their own food through photosynthesis.
Animals can make their own food through photosynthesis.
False
What is the primary source of energy for living things on Earth?
What is the primary source of energy for living things on Earth?
The Sun
Energy from the Sun is used by plants to produce ______________________ during photosynthesis.
Energy from the Sun is used by plants to produce ______________________ during photosynthesis.
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Match the following forms of energy with their descriptions:
Match the following forms of energy with their descriptions:
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What is the energy stored in an object placed above the ground?
What is the energy stored in an object placed above the ground?
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Energy can be created or destroyed.
Energy can be created or destroyed.
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What happens to energy during friction?
What happens to energy during friction?
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What is the role of stomata in photosynthesis?
What is the role of stomata in photosynthesis?
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Plants can produce food without sunlight.
Plants can produce food without sunlight.
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What is the energy stored in stretched, wound-up, or compressed objects called?
What is the energy stored in stretched, wound-up, or compressed objects called?
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The energy that makes things warm or hot is called ______________________ energy.
The energy that makes things warm or hot is called ______________________ energy.
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What is the energy of a moving object?
What is the energy of a moving object?
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Plants use the energy in the sugar they produce to obtain energy.
Plants use the energy in the sugar they produce to obtain energy.
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What is the energy stored in food, fuels, and batteries called?
What is the energy stored in food, fuels, and batteries called?
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For objects at the same height, the one with bigger mass has more ______________________ energy.
For objects at the same height, the one with bigger mass has more ______________________ energy.
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Match the following forms of energy with their descriptions:
Match the following forms of energy with their descriptions:
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Energy can be changed from one form to another.
Energy can be changed from one form to another.
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Study Notes
Photosynthesis
- Light is trapped by chlorophyll to produce energy
- Carbon dioxide is taken in through stomata, and water is absorbed by roots and transported to leaves
- Sugar is produced and transported to other parts of the plant, while oxygen is given out through openings on leaves
Factors Affecting Photosynthesis
- Amount of light
- Amount of carbon dioxide
- Amount of water
Plant Energy
- Plants use energy in sugar to stay alive
- Excess sugar is stored as starch
- Plants use sunlight to make food, passing energy to animals when they eat the plants
Energy Sources
- The Sun is the primary source of heat and light for living things on Earth
- Energy in food can be traced back to the Sun
Energy Types
- Light energy: enables us to see
- Kinetic energy: energy of motion or movement
- Heat energy: energy that makes things warm or hot
- Sound energy: energy that we can hear, produced by activities like whistling, tapping, clapping
- Electrical energy: energy generated in power stations, stored in batteries and solar cells, can be changed to other forms like light, heat, sound
- Potential energy: energy stored in objects, including chemical, gravitational, and elastic potential energy
- Chemical potential energy: stored in food, fuels, and batteries, can be changed to other forms like heat, electrical, light, sound
- Gravitational potential energy: energy stored in an object placed above the ground, decreases as height decreases
- Elastic potential energy: energy stored in stretched, wound-up, or compressed objects like rubber bands, toy springs
Energy Conversion
- Energy can be changed from one form to another, but cannot be created or destroyed
- Examples of energy conversion:
- Gravitational potential energy to kinetic energy
- Chemical potential energy to electrical energy to sound energy
- Electrical energy to heat and light energy
- Chemical potential energy to kinetic, heat, and sound energy
Energy and Living Things
- Food provides energy needed for activities
- All living things get energy from food
- Energy converted to heat is most likely due to friction
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Description
Learn about the process of photosynthesis, factors that affect it, and how plants use energy from sugar to stay alive. Discover how plants produce energy and store excess sugar as starch.
