Daily Practice - 13+ Common Entrance
Common Entrance english, maths and science.
20th August 2019
- 1Biology: Cells, Microscopy and Genetics
A pupil views onion cells under a microscope after adding a drop of iodine solution to the slide. State why the iodine solution was added.
- 2Biology: Respiration, Digestion and Gas Exchange
State one way the alveoli are adapted for efficient gas exchange.
- 3Chemistry: Materials
A pupil finds the volume of an irregular stone using a measuring cylinder. The water level rises from 35 cm^3 to 52 cm^3 when the stone is added. The stone has a mass of 42.5 g. Calculate the density of the stone, giving your answer to 2 significant figures.
- 4Chemistry: Acids, Reactions and the Periodic Table
Describe the test for carbon dioxide gas, and state the positive result.
- 5Chemistry: The Periodic Table and Separating Mixtures
Explain why a pencil, not a pen, must be used to draw the baseline on chromatography paper.
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