Plant Matter from Air and Water - 5th Grade Science
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What green pigment in leaves captures light energy used for photosynthesis?
What green pigment in leaves captures light energy used for photosynthesis?
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Chlorophyll. This molecule absorbs red and blue light wavelengths for photosynthesis.
Chlorophyll. This molecule absorbs red and blue light wavelengths for photosynthesis.
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Which tiny openings on leaves let $CO_2$ enter and $O_2$ leave during photosynthesis?
Which tiny openings on leaves let $CO_2$ enter and $O_2$ leave during photosynthesis?
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Stomata. These pores open and close to control gas exchange and water loss.
Stomata. These pores open and close to control gas exchange and water loss.
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What process do plants use to make sugar (glucose) from carbon dioxide and water using light?
What process do plants use to make sugar (glucose) from carbon dioxide and water using light?
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Photosynthesis. Plants convert light energy into chemical energy stored in sugar molecules.
Photosynthesis. Plants convert light energy into chemical energy stored in sugar molecules.
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What gas from the air provides the carbon atoms that become part of plant sugars and other plant matter?
What gas from the air provides the carbon atoms that become part of plant sugars and other plant matter?
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Carbon dioxide ($CO_2$). Plants absorb this gas through stomata to build carbon-based molecules.
Carbon dioxide ($CO_2$). Plants absorb this gas through stomata to build carbon-based molecules.
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What substance absorbed by roots provides hydrogen and oxygen atoms used to build plant sugars?
What substance absorbed by roots provides hydrogen and oxygen atoms used to build plant sugars?
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Water ($H_2O$). Combined with $CO_2$ and light energy to form glucose during photosynthesis.
Water ($H_2O$). Combined with $CO_2$ and light energy to form glucose during photosynthesis.
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What is the main product (food molecule) plants make during photosynthesis that becomes plant biomass?
What is the main product (food molecule) plants make during photosynthesis that becomes plant biomass?
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Glucose (sugar). This simple sugar ($C_6H_{12}O_6$) forms the building blocks of plant tissue.
Glucose (sugar). This simple sugar ($C_6H_{12}O_6$) forms the building blocks of plant tissue.
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What gas is released into the air as a product of photosynthesis?
What gas is released into the air as a product of photosynthesis?
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Oxygen ($O_2$). Released when water molecules split to provide electrons for the process.
Oxygen ($O_2$). Released when water molecules split to provide electrons for the process.
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Which plant structure takes in $CO_2$ from the air for photosynthesis: roots or leaves?
Which plant structure takes in $CO_2$ from the air for photosynthesis: roots or leaves?
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Leaves. Contains stomata that allow gas exchange with the atmosphere.
Leaves. Contains stomata that allow gas exchange with the atmosphere.
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Which plant structure absorbs water from the soil: roots or flowers?
Which plant structure absorbs water from the soil: roots or flowers?
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Roots. Specialized structures that absorb water and dissolved minerals from soil.
Roots. Specialized structures that absorb water and dissolved minerals from soil.
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What is the correct word for the total mass of living material in a plant (stems, leaves, roots)?
What is the correct word for the total mass of living material in a plant (stems, leaves, roots)?
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Biomass. The total dry weight of all organic matter in the plant.
Biomass. The total dry weight of all organic matter in the plant.
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Which provides most of the mass a tree gains as it grows: soil minerals or air and water?
Which provides most of the mass a tree gains as it grows: soil minerals or air and water?
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Air and water. Carbon from air and hydrogen from water make up most plant mass.
Air and water. Carbon from air and hydrogen from water make up most plant mass.
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Which evidence best supports that plant mass comes mostly from air: soil level stays similar or soil disappears?
Which evidence best supports that plant mass comes mostly from air: soil level stays similar or soil disappears?
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Soil level stays similar. If soil provided mass, the soil level would drop as plants grow.
Soil level stays similar. If soil provided mass, the soil level would drop as plants grow.
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Identify the correct claim: plant mass comes mostly from soil or mostly from $CO_2$ and $H_2O$.
Identify the correct claim: plant mass comes mostly from soil or mostly from $CO_2$ and $H_2O$.
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Mostly from $CO_2$ and $H_2O$. Photosynthesis combines these raw materials into organic compounds.
Mostly from $CO_2$ and $H_2O$. Photosynthesis combines these raw materials into organic compounds.
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Which atom in plant sugars comes mainly from the air: carbon or iron?
Which atom in plant sugars comes mainly from the air: carbon or iron?
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Carbon. Carbon dioxide provides the carbon backbone for all organic molecules.
Carbon. Carbon dioxide provides the carbon backbone for all organic molecules.
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Which evidence matches photosynthesis: plant uses light to take in $CO_2$ and release $O_2$?
Which evidence matches photosynthesis: plant uses light to take in $CO_2$ and release $O_2$?
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Takes in $CO_2$ and releases $O_2$. This gas exchange is the hallmark of photosynthesis in plants.
Takes in $CO_2$ and releases $O_2$. This gas exchange is the hallmark of photosynthesis in plants.
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In a sealed container with a plant and light, which change supports photosynthesis: $CO_2$ decreases or increases?
In a sealed container with a plant and light, which change supports photosynthesis: $CO_2$ decreases or increases?
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$CO_2$ decreases. Plants consume $CO_2$ during photosynthesis to build sugars.
$CO_2$ decreases. Plants consume $CO_2$ during photosynthesis to build sugars.
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Choose the best conclusion: if a plant has no $CO_2$, can it make new biomass by photosynthesis?
Choose the best conclusion: if a plant has no $CO_2$, can it make new biomass by photosynthesis?
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No, it cannot. Without $CO_2$, plants cannot produce glucose through photosynthesis.
No, it cannot. Without $CO_2$, plants cannot produce glucose through photosynthesis.
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What is the main role of sunlight in photosynthesis: provide energy or provide carbon atoms?
What is the main role of sunlight in photosynthesis: provide energy or provide carbon atoms?
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Provide energy. Light powers the chemical reactions but doesn't become part of the plant.
Provide energy. Light powers the chemical reactions but doesn't become part of the plant.
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Which statement is correct: minerals make most plant mass or minerals are needed in small amounts?
Which statement is correct: minerals make most plant mass or minerals are needed in small amounts?
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Minerals are needed in small amounts. Soil provides nutrients but not the bulk carbon and hydrogen in plants.
Minerals are needed in small amounts. Soil provides nutrients but not the bulk carbon and hydrogen in plants.
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Which materials are the main reactants used to build plant sugar in photosynthesis?
Which materials are the main reactants used to build plant sugar in photosynthesis?
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$CO_2$ and $H_2O$. These combine in chloroplasts to form glucose and oxygen.
$CO_2$ and $H_2O$. These combine in chloroplasts to form glucose and oxygen.
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