Tiêu đề CBSE Class 4 Science worksheets on plants.pdf ✅

04 PLANTS | WS 01 Name: _______________________ Date: _______________ Fill in the blanks with the words given in the box to complete the article on photosynthesis. branches sugar leaves roots food cookies parts glucose A tree is like a hungry kid because it needs ________ to grow, and it prefers __________. It's not exactly the same sugar we find in candy and ______________, but it is a special kind called ______________ that makes trees grow. You might be thinking, How does a tree eat the food (sugar)? It doesn't even have a mouth! True, trees don't have mouths. They do have __________ to take in water and minerals, but they don't really get food through their roots either. Trees make their sugar in their ____________. The sugar is sent from the leaves into the ________________, trunk, and even the roots. When a tree "eats," it is moving sugar from the leaves to all its other __________. www.olympiadtester.com Copyright@Olympiadtester www.olympiadtester.com Page 1
04 PLANTS | WS 02 Name: _______________________ Date: _______________ A tree needs a special kind of sugar called glucose that makes it grow. Trees make their sugar in their leaves. The sugar is sent from the leaves into the branches, trunk, and even the roots. When a tree “eats,” it is moving sugar from the leaves to all its other parts. Photosynthesis occurs when a tree uses the sunlight and chlorophyll to convert carbon dioxide and water into glucose. The tree needs to eat this glucose to grow, and we know it is eating because the leaves are turning green. It isn’t the glucose which turns the leaves green, however, it is the chlorophyll. Trees grow the most in the spring and summer, where there is a lot of sunshine every day. When fall begins, the days grow shorter and there is less sun. This alerts the tree to begin getting ready for winter. The leaves begin to turn red, orange, gold, and brown, because with less sunlight and water for photosynthesis, the green chlorophyll begins to disappear. The leaf colors we see in the autumn have been in the leaves all along, but with so much green chlorophyll, we can’t see them until the chlorophyll is gone. As winter begins to approach, the tree uses the food it has stored during the spring and summer, and goes into a rest period. Actually, the tree hibernates...just like bears do! The only difference is that bears lie down in a cave to sleep, and trees lose all their leaves and stand up to sleep. 1. How does a tree get water? 2. Why do a tree's leaves change color in the fall? 3. What signals a tree to prepare for winter? www.olympiadtester.com Copyright@Olympiadtester www.olympiadtester.com Page 1
4. What causes a tree's leaves to appear green? 5. What four things does a tree need for photosynthesis? 6. What substance does a tree use for food? www.olympiadtester.com Copyright@Olympiadtester www.olympiadtester.com Page 2
04 PLANTS | WS 03 Name: _______________________ Date: _______________ Fill in the blanks with the words given in the box to complete the article on Root system. underground no Root thinner carrot mass one wheat minerals stores gravity Fibrous fixes dense absorbs Tap nutrients outward The ________ System Root is the ______________________ part of the plants body and grows towards the force of ______________. It __________ the plant within the soil and ______________ water and mineral __________________ from the soil. It ____________ excess food. ______ Roots It consists of ______ main long thick root growing downwards from which many ______________ roots develop. Taproot goes deep into the soil for searching for water and ________________. Examples: sugar beet or ____________, bean, tea, peepal etc. ______________ Roots In case of fibrous root there is ______ main root. It consists of a __________ equal size roots that arise from the stem. The roots grow downward and ______________ from the stem, branching repeatedly to form a ________ of fine roots. Example: lilies, grasses, __________, rice, palm etc. www.olympiadtester.com Copyright@Olympiadtester www.olympiadtester.com Page 1