دروس الصف السابع

A vibrant cell interior showing mitochondria with glowing ATP symbols, glucose molecules entering, and carbon dioxide and water exiting, with a friendly cartoon mitochondrion guiding the scene.

A bright laboratory with microscopes, petri dishes showing growing cells, and a digital screen displaying stem cell differentiation paths.

A vibrant landscape showing a sunlit ocean on the left with rising vapor arrows under a glowing sun, white clouds forming in the center sky, rain falling onto forests and rivers below, and water collecting in a lake on the right.

A colorful digital illustration showing a virus attaching to a host cell, with labels for virus parts like capsid and genetic material, surrounded by a microscopic view of cells and viral particles.

A sunlit forest showing a green plant capturing sunlight as a producer, a rabbit eating the plant as a primary consumer, a mushroom cluster decomposing a fallen log as decomposers, and dark nutrient-rich soil beneath the log.

A forest scene with a tall tree absorbing labeled CO2 arrows from the atmosphere on the left, a deer exhaling small CO2 bubbles in the center, a fallen log with fungi releasing carbon into rich soil below, and a factory on the right releasing thick smoke arrows upward into the sky.

A panoramic split-screen showing a desert with cacti, a dense forest with tall trees, a wide grassland with grazing animals, and a snowy tundra with low shrubs and polar animals.

A vibrant forest scene showing diverse living things: animals, plants, fungi, bacteria, and a flowing stream with microscopic life visible in a magnified bubble.

A vibrant wildlife reserve showing endangered animals like tigers and sea turtles, conservationists tagging animals, and a display of protected habitats.

A futuristic lab with a cloning pod, images of cloned animals like Dolly the sheep, and a panel showing ethical pros and cons.

A lush forest with wind turbines spinning and solar panels gleaming in sunlight, birds flying overhead, a river flowing below, and a coal mine visible in the far background, while a guide holds a globe displaying sun, wind, coal, and oil icons.

A layered cutaway illustration showing a cell, tissue, organ, organ system, organism, population, community, ecosystem, and biosphere with labels and colorful imagery.

An anatomical illustration showing a human skeleton with muscles attached, highlighting joints like knees and elbows, and a person running.

A detailed cross-section illustration of a flowering plant showing roots underground, stem with vascular tissue, leaves with stomata, and flowers with labeled parts like petals and pistils.

A vibrant classroom scene showing detailed labeled diagrams of male and female reproductive systems, with the guiding character 'education/medi' pointing to key organs like the uterus, ovaries, testes, and sperm cells. Background includes a large screen illustrating fertilization as a sperm meets an egg.

A whiteboard filled with a large Punnett square grid, with B and b allele letters arranged along the top and left side rows and offspring genotype combinations filled into each inner square, while Medi stands beside it pointing to the results.

A vibrant forest with various animals such as birds building nests, bears hibernating in caves, and meerkats standing guard. Bright, detailed images of animal behaviors in action fill the scene.

A vibrant forest where birds with noticeably different beak shapes — long and thin versus short and thick — perch on rough bark-covered tree trunks, while Medi stands beside a large comparison board showing which beak shape captures insects in bark crevices most efficiently.

A split scene contrasting a smog-choked industrial city with factory smokestacks pouring emissions against a pristine forest with a clean river, a community recycling station, and solar panels gleaming under a bright blue sky.

A jungle clearing where an elephant stands center-stage with a small oxpecker bird perched on its back and a tick visible on its hide, while a clownfish shelters among glowing sea anemone tentacles in a bottom-corner ocean inset, and Medi labels each interaction.

A colorful animated cell dividing, showing chromosomes lining up and separating, with Medi holding a microscope and pointing to labeled phases: Prophase, Metaphase, Anaphase, Telophase.

A farm scene showing farmers selecting animals for breeding, alongside a high-tech laboratory with scientists using genetic engineering tools. Images include crops modified for pest resistance and animals bred for specific traits.

A vibrant garden scene showing flowering plants, bees pollinating flowers, seeds on the ground, and a young sprout emerging from soil.

A sunlit farm field with dark soil in the foreground containing root nodules and illustrated nitrogen-fixing bacteria, corn plants growing at left, a grazing cow at right, white clouds above, and a lightning bolt striking in the upper corner to show atmospheric nitrogen fixation.

A detailed, labeled diagram of a bacterial cell showing the cell wall, cell membrane, cytoplasm, flagella, ribosomes, and DNA in a nucleoid region.

A colorful forest and river scene showing various animals: a mammal (deer), bird (eagle), reptile (lizard), amphibian (frog), and fish (trout) in their natural habitats.

A bright outdoor scene with a large leaf cross-section revealing green chloroplasts absorbing golden sunlight rays, water molecule arrows rising upward from roots below, carbon dioxide arrows entering through open stomata, and glucose and oxygen molecules exiting the leaf, with Medi pointing to each component of the chemical equation.

A bright biology classroom with a computer monitor displaying a colorful bar graph of plant heights, a whiteboard covered in a neat data table with week numbers and centimeter measurements, and Medi holding a tablet showing a line graph tracing plant growth over five weeks.

A split-screen illustration comparing a small, structurally simple prokaryotic cell on the left — with circular DNA floating in the cytoplasm and a cell wall — to a larger, more complex eukaryotic cell on the right with a membrane-bound nucleus and visible organelles, both viewed through a microscope frame overlay.

A bright biology lab with microscopes and potted plants on benches, colorful charts pinned to the wall, and Medi standing in the foreground holding a clipboard labeled Scientific Method while pointing to a row of test tubes and an open lab notebook on the bench.

A forest scene with deer showing noticeably different antler sizes, butterflies displaying varying wing patterns, and squirrels with different fur shades, alongside DNA helix icons and small environmental factor icons representing sunlight and rainfall as influences on individual differences.

A split-screen underwater and terrestrial scene: left side shows invertebrates like a jellyfish, earthworm, and spider; right side shows vertebrates like a frog, bird, and fish.

A 3D model of DNA’s double helix twisting with labeled bases (A, T, C, G), with Medi pointing to base pairs and a strand of DNA unzipping.

A colorful diagram of the human nervous system highlighting the brain, spinal cord, and peripheral nerves, with animated nerve impulses traveling from a hand touching a hot object to the spinal cord and back to the muscles.

A family tree showing different traits (like eye color and hair type) passed down, with Medi holding a magnifying glass over DNA strands and colorful gene symbols.

A magnified animated cross-section of a phospholipid bilayer with hydrophilic round heads facing outward on both sides and hydrophobic zigzag tails pointing inward, with channel proteins spanning the membrane, ATP molecules glowing near an active-transport pump, and colored ion spheres lined up on each side.

A laboratory scene with microscopes, early scientists’ portraits, and magnified images of cells from plants and animals in colorful detail.

A split-screen illustration showing a detailed animal cell on one side and a plant cell on the other, each labeled with colorful organelles like nucleus, mitochondria, cell wall, and chloroplasts.

A bright classroom microscope station with a prepared onion-skin slide mounted on the stage beneath a focused light beam, a notebook open to hand-sketched cell drawings beside it, and Medi pointing to labeled microscope parts including the eyepiece at the top, objective lenses at the bottom of the body tube, and the mechanical stage beneath.

A colorful diagram showing a leaf with sunlight hitting chloroplasts, arrows indicating water uptake from roots, carbon dioxide entering stomata, and glucose and oxygen being produced.

Medi kneels beside a glowing transparent human model, tracing bright pathways linking heart, lungs, and muscles, and says: 'Watch how every level hands off its job to the next one up.'

Medi the guide stands beside a glowing, see-through model of a human body, pointing as tiny cells link into tissues, organs, and connected systems that light up in sequence.

A modern laboratory scene featuring the guiding character 'education/medi' demonstrating DNA extraction from plants. The background shows images of genetically modified crops, bacteria used to produce insulin, and a diagram of CRISPR gene editing.

A colorful split microscopic view showing a plant cell and an animal cell side by side, with a blue nucleus prominently positioned in each, red mitochondria clustered in the animal cell, a green chloroplast visible only in the plant cell, and a large purple central vacuole in the plant cell.

A vibrant detailed cross-section illustration of a plant cell and an animal cell shown side by side, with color-coded organelles including a blue nucleus, orange mitochondria, green chloroplast, purple Golgi apparatus, pink endoplasmic reticulum, yellow lysosome, and large central vacuole, with Medi pointing to each labeled organelle.

Lumi peers through the eyepiece of a bright compound microscope in a sunlit lab, grinning as a thin slice of onion skin comes into sharp focus, revealing its tightly packed rectangular cells like a mosaic of tiny rooms.

Medi the explorer leans over a glowing microscope in a sunlit lab, pointing at a magnified cell projected on the wall beside a leaf, an ant, and a drop of pond water.

Medi stands inside a glowing mitochondrion the size of a room, holding a glucose molecule like a glowing orange gem, while tiny ATP packets light up around her like sparks flying off a campfire.

A detailed image of the human torso showing lungs expanding and contracting, the trachea, bronchi branching into lungs, and tiny alveoli highlighted with oxygen and carbon dioxide molecules moving in and out.

A classroom with large eye-color trait posters on the wall showing brown and blue eye photographs, a family tree diagram tracing three generations of eye colors, and Medi holding allele symbol cards labeled uppercase B for dominant brown and lowercase b for recessive blue.

A lush forest and river ecosystem scene with the guiding character 'education/medi' highlighting animals, plants, and human activities like recycling, planting trees, and using renewable energy. Visuals include before-and-after images of deforestation and pollution.

A vibrant outdoor scene with bright sunlight beaming onto a large green leaf, a circular zoom-in revealing labeled chloroplasts absorbing the light, blue water molecule arrows rising from soil through roots, carbon dioxide arrows entering open stomata, and oxygen and glucose molecules exiting the leaf on opposite sides.

A wide grassland scene with lush grass in the foreground, rabbits feeding in the middle ground, a fox stalking through tall grass, and a hawk soaring above, connected by bold arrows showing the direction of energy flow, while Medi holds a diagram contrasting this single food chain with a branching food web.

An illustrated cross-section of the human body showing the mouth, esophagus, stomach, small intestine, large intestine, liver, and pancreas, with arrows tracing the path of food and icons representing enzymes and nutrients.

Medi the guide kneels at the edge of a sunny green meadow, pointing to a grasshopper on a blade of grass while a hawk soars overhead and mushrooms sprout near a fallen log.

A glowing cell nucleus filled with colorful coiled chromosome strands and highlighted gene segments, with Medi pointing to a magnified DNA double helix and labeling each structural level.