Back to worksheetsScienceAges 7-9
Plants, leaves & photosynthesis
Explore how roots, stems, leaves and flowers support plant growth and photosynthesis. Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 7-9
Plants, leaves & photosynthesis
Take your time. Show your thinking.
1. Which three conditions do most seeds need to germinate: water, oxygen and warmth, or darkness, ice and salt?
2. What is the role of the green sepals on the outside of a flower bud: to protect the unopened flower bud, or to absorb soil nitrates?
3. Which vascular tissue carries sugars made in the leaves to the rest of the plant: phloem or bark?
4. What are the tiny openings on the underside of leaves that open and close to control gas exchange and water loss: stomata or tubers?
5. How are dandelion and maple seeds adapted to be dispersed away from the parent plant: by wind, or by sinking in deep water?
6. What do we call the process when a seed absorbs water, swells and begins to sprout into a seedling: germination or transpiration?
7. Why do plants need magnesium ions from the soil: to make green chlorophyll, or to attract wind?
8. What chemical reagent turns blue-black when added to a leaf that contains stored starch: iodine solution or pure water?
9. Which gas do plants take in from the air through tiny pores (stomata) to use in photosynthesis: carbon dioxide or nitrogen?
10. What green pigment inside plant chloroplasts absorbs light energy for photosynthesis: chlorophyll or haemoglobin?
11. After fertilisation, which part of a flowering plant develops into a fruit enclosing the seeds: the ovary or the sepal?
12. Which gas do plants release as a byproduct of photosynthesis: oxygen or helium?
12 questions · Seed 45 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Plants, leaves & photosynthesis
Answers and reasoning. Review before teaching.
1. Which three conditions do most seeds need to germinate: water, oxygen and warmth, or darkness, ice and salt?
Water, oxygen and warmthSeeds require water to activate enzymes, oxygen for respiration, and suitable warmth.
2. What is the role of the green sepals on the outside of a flower bud: to protect the unopened flower bud, or to absorb soil nitrates?
To protect the unopened flower budSepals enclose and protect the developing petals before the flower opens.
3. Which vascular tissue carries sugars made in the leaves to the rest of the plant: phloem or bark?
PhloemPhloem translocates dissolved sugars from leaves to growing roots, fruits and seeds.
4. What are the tiny openings on the underside of leaves that open and close to control gas exchange and water loss: stomata or tubers?
StomataGuard cells regulate stomata to balance carbon dioxide uptake with water conservation.
5. How are dandelion and maple seeds adapted to be dispersed away from the parent plant: by wind, or by sinking in deep water?
By windParachute-like plumes on dandelions and winged samaras on maples catch the wind.
6. What do we call the process when a seed absorbs water, swells and begins to sprout into a seedling: germination or transpiration?
GerminationGermination is the growth of an embryonic plant contained within a seed.
7. Why do plants need magnesium ions from the soil: to make green chlorophyll, or to attract wind?
To make green chlorophyllMagnesium is the central atom in every chlorophyll molecule; deficiency causes yellow leaves (chlorosis).
8. What chemical reagent turns blue-black when added to a leaf that contains stored starch: iodine solution or pure water?
Iodine solutionYellow-brown iodine solution turns blue-black in the presence of starch.
9. Which gas do plants take in from the air through tiny pores (stomata) to use in photosynthesis: carbon dioxide or nitrogen?
Carbon dioxidePlants combine carbon dioxide and water using light energy to make glucose and oxygen.
10. What green pigment inside plant chloroplasts absorbs light energy for photosynthesis: chlorophyll or haemoglobin?
ChlorophyllChlorophyll absorbs mainly red and blue light and reflects green light.
11. After fertilisation, which part of a flowering plant develops into a fruit enclosing the seeds: the ovary or the sepal?
OvaryThe fertilised ovules become seeds while the surrounding ovary wall ripens into a fruit.
12. Which gas do plants release as a byproduct of photosynthesis: oxygen or helium?
OxygenOxygen produced during photosynthesis diffuses out of the leaves into the air.
12 questions · Seed 45 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Plants, leaves & photosynthesis
Take your time. Show your thinking.
1. Which three conditions do most seeds need to germinate: water, oxygen and warmth, or darkness, ice and salt?
2. What is the role of the green sepals on the outside of a flower bud: to protect the unopened flower bud, or to absorb soil nitrates?
3. Which vascular tissue carries sugars made in the leaves to the rest of the plant: phloem or bark?
4. What are the tiny openings on the underside of leaves that open and close to control gas exchange and water loss: stomata or tubers?
5. How are dandelion and maple seeds adapted to be dispersed away from the parent plant: by wind, or by sinking in deep water?
6. What do we call the process when a seed absorbs water, swells and begins to sprout into a seedling: germination or transpiration?
7. Why do plants need magnesium ions from the soil: to make green chlorophyll, or to attract wind?
8. What chemical reagent turns blue-black when added to a leaf that contains stored starch: iodine solution or pure water?
9. Which gas do plants take in from the air through tiny pores (stomata) to use in photosynthesis: carbon dioxide or nitrogen?
10. What green pigment inside plant chloroplasts absorbs light energy for photosynthesis: chlorophyll or haemoglobin?
11. After fertilisation, which part of a flowering plant develops into a fruit enclosing the seeds: the ovary or the sepal?
12. Which gas do plants release as a byproduct of photosynthesis: oxygen or helium?
12 questions · Seed 45 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Plants, leaves & photosynthesis
Answers and reasoning. Review before teaching.
1. Which three conditions do most seeds need to germinate: water, oxygen and warmth, or darkness, ice and salt?
Water, oxygen and warmthSeeds require water to activate enzymes, oxygen for respiration, and suitable warmth.
2. What is the role of the green sepals on the outside of a flower bud: to protect the unopened flower bud, or to absorb soil nitrates?
To protect the unopened flower budSepals enclose and protect the developing petals before the flower opens.
3. Which vascular tissue carries sugars made in the leaves to the rest of the plant: phloem or bark?
PhloemPhloem translocates dissolved sugars from leaves to growing roots, fruits and seeds.
4. What are the tiny openings on the underside of leaves that open and close to control gas exchange and water loss: stomata or tubers?
StomataGuard cells regulate stomata to balance carbon dioxide uptake with water conservation.
5. How are dandelion and maple seeds adapted to be dispersed away from the parent plant: by wind, or by sinking in deep water?
By windParachute-like plumes on dandelions and winged samaras on maples catch the wind.
6. What do we call the process when a seed absorbs water, swells and begins to sprout into a seedling: germination or transpiration?
GerminationGermination is the growth of an embryonic plant contained within a seed.
7. Why do plants need magnesium ions from the soil: to make green chlorophyll, or to attract wind?
To make green chlorophyllMagnesium is the central atom in every chlorophyll molecule; deficiency causes yellow leaves (chlorosis).
8. What chemical reagent turns blue-black when added to a leaf that contains stored starch: iodine solution or pure water?
Iodine solutionYellow-brown iodine solution turns blue-black in the presence of starch.
9. Which gas do plants take in from the air through tiny pores (stomata) to use in photosynthesis: carbon dioxide or nitrogen?
Carbon dioxidePlants combine carbon dioxide and water using light energy to make glucose and oxygen.
10. What green pigment inside plant chloroplasts absorbs light energy for photosynthesis: chlorophyll or haemoglobin?
ChlorophyllChlorophyll absorbs mainly red and blue light and reflects green light.
11. After fertilisation, which part of a flowering plant develops into a fruit enclosing the seeds: the ovary or the sepal?
OvaryThe fertilised ovules become seeds while the surrounding ovary wall ripens into a fruit.
12. Which gas do plants release as a byproduct of photosynthesis: oxygen or helium?
OxygenOxygen produced during photosynthesis diffuses out of the leaves into the air.
12 questions · Seed 45 · Age guidance, not curriculum certification