Matter Enters Through Photosynthesis - Middle School Life Science
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What raw material provides the hydrogen atoms that enter organisms during photosynthesis?
What raw material provides the hydrogen atoms that enter organisms during photosynthesis?
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Water ($H_2O$). Water molecules are split to provide hydrogen for sugar synthesis.
Water ($H_2O$). Water molecules are split to provide hydrogen for sugar synthesis.
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What is the main sugar molecule that stores matter made by photosynthesis?
What is the main sugar molecule that stores matter made by photosynthesis?
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Glucose ($C_6H_{12}O_6$). This 6-carbon sugar is the primary product storing chemical energy.
Glucose ($C_6H_{12}O_6$). This 6-carbon sugar is the primary product storing chemical energy.
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What is the balanced chemical equation for photosynthesis?
What is the balanced chemical equation for photosynthesis?
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$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$. Shows how inorganic molecules combine to form organic matter.
$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$. Shows how inorganic molecules combine to form organic matter.
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Which plant cell organelle is the main site where photosynthesis moves matter into sugars?
Which plant cell organelle is the main site where photosynthesis moves matter into sugars?
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Chloroplast. Contains the machinery to convert light energy into chemical bonds.
Chloroplast. Contains the machinery to convert light energy into chemical bonds.
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What pigment absorbs light energy used to drive photosynthesis in plants?
What pigment absorbs light energy used to drive photosynthesis in plants?
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Chlorophyll. This green pigment captures light energy to power the reactions.
Chlorophyll. This green pigment captures light energy to power the reactions.
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Which gas is taken in through stomata and becomes part of sugar during photosynthesis?
Which gas is taken in through stomata and becomes part of sugar during photosynthesis?
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Carbon dioxide ($CO_2$). Stomata are pores that allow this gas to enter leaf cells.
Carbon dioxide ($CO_2$). Stomata are pores that allow this gas to enter leaf cells.
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Which gas is released as a product when water is split during photosynthesis?
Which gas is released as a product when water is split during photosynthesis?
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Oxygen ($O_2$). Released when water molecules are split for their hydrogen atoms.
Oxygen ($O_2$). Released when water molecules are split for their hydrogen atoms.
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Identify the form of matter that plants make and store when they convert $CO_2$ into food.
Identify the form of matter that plants make and store when they convert $CO_2$ into food.
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Organic molecules (sugars such as glucose). Inorganic carbon is converted into organic carbon compounds.
Organic molecules (sugars such as glucose). Inorganic carbon is converted into organic carbon compounds.
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What structure controls gas exchange so $CO_2$ can enter a leaf for photosynthesis?
What structure controls gas exchange so $CO_2$ can enter a leaf for photosynthesis?
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Stomata. These pores open and close to regulate gas exchange in leaves.
Stomata. These pores open and close to regulate gas exchange in leaves.
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What plant tissue transports water to leaves so its atoms can enter sugars in photosynthesis?
What plant tissue transports water to leaves so its atoms can enter sugars in photosynthesis?
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Xylem. Transports water from roots upward through the plant stem.
Xylem. Transports water from roots upward through the plant stem.
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What plant tissue transports sugars made in leaves to the rest of the plant?
What plant tissue transports sugars made in leaves to the rest of the plant?
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Phloem. Moves sugars from source (leaves) to sink (roots, fruits).
Phloem. Moves sugars from source (leaves) to sink (roots, fruits).
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What raw material provides the carbon atoms that enter organisms during photosynthesis?
What raw material provides the carbon atoms that enter organisms during photosynthesis?
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Carbon dioxide ($CO_2$). Carbon atoms from $CO_2$ become the backbone of organic molecules.
Carbon dioxide ($CO_2$). Carbon atoms from $CO_2$ become the backbone of organic molecules.
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Which statement best describes matter movement in photosynthesis: matter is created or rearranged?
Which statement best describes matter movement in photosynthesis: matter is created or rearranged?
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Matter is rearranged into new molecules. Follows conservation of matter - atoms are reorganized, not created.
Matter is rearranged into new molecules. Follows conservation of matter - atoms are reorganized, not created.
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Choose the correct source of a plant’s increased mass: soil minerals, sunlight, or $CO_2$.
Choose the correct source of a plant’s increased mass: soil minerals, sunlight, or $CO_2$.
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$CO_2$ (carbon atoms become part of plant biomass). Most plant mass comes from air, not soil or light energy.
$CO_2$ (carbon atoms become part of plant biomass). Most plant mass comes from air, not soil or light energy.
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Identify the reactants in photosynthesis: $CO_2$, $H_2O$, glucose, or $O_2$.
Identify the reactants in photosynthesis: $CO_2$, $H_2O$, glucose, or $O_2$.
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$CO_2$ and $H_2O$. These are the starting materials that enter the reaction.
$CO_2$ and $H_2O$. These are the starting materials that enter the reaction.
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Identify the products in photosynthesis: $CO_2$, $H_2O$, glucose, or $O_2$.
Identify the products in photosynthesis: $CO_2$, $H_2O$, glucose, or $O_2$.
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Glucose ($C_6H_{12}O_6$) and $O_2$. These are the substances formed by the photosynthesis reaction.
Glucose ($C_6H_{12}O_6$) and $O_2$. These are the substances formed by the photosynthesis reaction.
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If a plant is given extra $CO_2$, which product molecule contains the added carbon atoms?
If a plant is given extra $CO_2$, which product molecule contains the added carbon atoms?
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Glucose ($C_6H_{12}O_6$). Carbon from $CO_2$ is incorporated into the sugar's structure.
Glucose ($C_6H_{12}O_6$). Carbon from $CO_2$ is incorporated into the sugar's structure.
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Which trophic level first gains new organic matter from photosynthesis: producers or consumers?
Which trophic level first gains new organic matter from photosynthesis: producers or consumers?
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Producers (autotrophs). Only producers can convert inorganic matter into organic matter.
Producers (autotrophs). Only producers can convert inorganic matter into organic matter.
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What are the products in the photosynthesis equation that contain the new organic matter?
What are the products in the photosynthesis equation that contain the new organic matter?
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Glucose (sugar) and $O_2$. These organic products store chemical energy and form plant biomass.
Glucose (sugar) and $O_2$. These organic products store chemical energy and form plant biomass.
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Which substance supplies most of the carbon atoms that end up in plant sugars and biomass?
Which substance supplies most of the carbon atoms that end up in plant sugars and biomass?
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$CO_2$ from the air. Plants absorb carbon dioxide through stomata to build organic molecules.
$CO_2$ from the air. Plants absorb carbon dioxide through stomata to build organic molecules.
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Which pigment captures light energy that powers photosynthesis?
Which pigment captures light energy that powers photosynthesis?
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Chlorophyll. This green pigment absorbs light energy to drive chemical reactions.
Chlorophyll. This green pigment absorbs light energy to drive chemical reactions.
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Which plant structure is the main entry point for $CO_2$ to move into a leaf?
Which plant structure is the main entry point for $CO_2$ to move into a leaf?
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Stomata. These pores in leaves open and close to regulate gas exchange.
Stomata. These pores in leaves open and close to regulate gas exchange.
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What is the main form of stored plant matter made from many glucose units?
What is the main form of stored plant matter made from many glucose units?
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Starch. Plants link glucose molecules together for long-term energy storage.
Starch. Plants link glucose molecules together for long-term energy storage.
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What happens to the oxygen atoms in $CO_2$ and $H_2O$ during photosynthesis?
What happens to the oxygen atoms in $CO_2$ and $H_2O$ during photosynthesis?
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Many end up in $O_2$ released and in sugar and water molecules. Oxygen atoms are redistributed among products through chemical bonds.
Many end up in $O_2$ released and in sugar and water molecules. Oxygen atoms are redistributed among products through chemical bonds.
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Which option best describes what happens to $CO_2$ during photosynthesis: released, absorbed, or destroyed?
Which option best describes what happens to $CO_2$ during photosynthesis: released, absorbed, or destroyed?
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Absorbed and used to build sugars. Plants take in $CO_2$ and incorporate its carbon into glucose molecules.
Absorbed and used to build sugars. Plants take in $CO_2$ and incorporate its carbon into glucose molecules.
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