Worksheet library · KS3

Biology KS3 Science Worksheets, Questions and Revision

17 original Biology worksheet packs - 188 printable pages with full mark schemes. Cells, organisation, genetics, ecology and the rest of the biology specification. View any pack in the browser or open the print-ready PDF.

National Curriculum

See the method: Cells and Organisation

A student draws a plant cell as seen under a microscope. The actual width of the cell is 25 micrometres. The width of the student's drawing is 30mm. Calculate the magnification of the drawing.

Write down the magnification equation: magnification = image size / actual size.
Convert both measurements to the same unit: 25 micrometres = 0.025mm (the drawing is already in mm).
Substitute the values into the equation: magnification = 30 / 0.025.
Calculate: 30 / 0.025 = 1200.
State the final answer: magnification = x1200.

1.1 Cells and Organisation7p + answers · 70 marks · PDF

1.1d Cells and Organisation: Exam Drill6p + answers · 59 marks · PDF

1.1x Cells and Organisation: Depth and Practice8p + answers · 69 marks · PDF

1.2 Nutrition and Digestion8p + answers · 86 marks · PDF

1.2d Nutrition and Digestion: Exam Drill7p + answers · 54 marks · PDF

1.2x Nutrition and Digestion: Depth and Practice5p + answers · 60 marks · PDF

1.3 Respiration and Photosynthesis13p + answers · 93 marks · PDF

1.3d Respiration and Photosynthesis: Exam Drill5p + answers · 43 marks · PDF

1.3x Respiration and Photosynthesis: Depth and Practice5p + answers · 44 marks · PDF

1.4 Reproduction and Inheritance11p + answers · 103 marks · PDF

1.4d Reproduction and Inheritance: Exam Drill5p + answers · 42 marks · PDF

1.4x Reproduction and Inheritance: Depth and Practice6p + answers · 50 marks · PDF