Cells 1. Put these words in order of complexity: cell, organism, organ, system, tissue. (1) ___________________________________________________ ___________________________________________________ 2. List the main structures you would expect to find in a human cell (2) __________________________________________________ __________________________________________________ 3. Name the three extra structures that are only found in plant cells and not animal cells (2) ___________________________________________________ ___________________________________________________ 4. Draw lines to connect the correct term with the definition: (4) Nucleus Strengthens the cell and gives it support Vacuole Controls the movement of substances in and out of the cell Chloroplast Controls all activities of the cell, holds the chromosomes Mitochondria Contain chlorophyll, is the site of photosynthesis Cell wall Filled with cell sap, keeps the cell rigid to support the plant Cell membrane Site of aerobic respiration, released energy to the cell 5. Explain how a red blood cell is adapted for its function. (2) ___________________________________________________ ___________________________________________________ ___________________________________________________ 6. Complete the following sentences: (5) Diffusion is the _____________ of particles from any area where they are in a ____ __________ to an area where they are in a ______ ___________. 6. Complete the following table: (6) Eyepiece Magnification Objective Magnification Total Magnification 8x 4x 32x 5x 40x 5x 100x 20x 280x 200x Total marks: _____ / 22 Grade: ______ R/A/G: _______ Extra Challenge Task Option A – Create a poster or a model to display the differences between the structure of a prokaryote and a eukaryotic plant cell. Option B - Imagine you have been trapped within an animal cell, produce a piece of creative writing to describe your journey around the cell. Cells – Mark scheme 1. Put these words in order of complexity: cell, organism, organ, system, tissue. (1) Most simple: Cell > Tissue > Organ > System > Organism 2. List the main structures you would expect to find in a human cell. (2) Nucleus, cell membrane, cytoplasm, mitochondria, ribosomes 3. Name the three extra structures that are only found in plant cells and not animal cells. (2) Vacuole, cell wall and chloroplasts 4. Draw lines to connect the correct term with the definition: (4) Nucleus Strengthens the cell and gives it support Vacuole Controls the movement of substances in and out of the cell Chloroplast Controls all activities of the cell, holds the chromosomes Mitochondria Contain chlorophyll, is the site of photosynthesis Cell wall Filled with cell sap, keeps the cell rigid to support the plant Cell membrane Site of aerobic respiration, released energy to the cell 5. Explain how a red blood cell is adapted for its function. (2) A red blood cell has no nucleus which means it can carry more oxygen, a red blood cell also has a disk shape so that it can fit through narrow blood vessels, it also has a large surface area to absorb more oxygen. 6. Complete the following sentences: (5) Diffusion is the movement of particles from any area where they are in a low concentration to an area where they are in a high concentration. 6. Complete the following table: (6) Eyepiece Magnification Objective Magnification Total Magnification 8x 4x 32x 5x 40x 200x 5x 20x 100x 70x 20x 280x 10x 20x 200x Grading: I will give work out a percentage for the students work and award RED/AMBER/GREEN based on the following percentage boundaries: If they have achieved above 68%, I will award them a GREEN. If they have achieved between 45 - 68% I will award them an AMBER. If they achieve below 45%, I will award them a RED.
