Question Constellation Sign up for free AQA · GCSE · Biology
Homeostasis and response
06.4 · 2 marks Choosing participants for glucose testing People with Type 1 diabetes were selected for the investigation instead of people who did not have diabetes. Explain why. 06.6 · 1 mark Blood-glucose investigation safety It was important for the scientists to monitor the health of each person during the investigation. Suggest one reason why. 06.7 · 2 marks Homeostasis and optimal reaction time People who do not have diabetes usually have a blood glucose concentration in the range of 4.0 mmol/dm³ to 7.8 mmol/dm³.... 06.8 · 5 marks Hormonal control of blood glucose Describe how blood glucose concentration is maintained within narrow limits in people who do not have diabetes. 06.9 · 2 marks Synaptic transmission and reaction time Describe how an increase in the chemicals could decrease reaction time. 06.1 · 1 mark Endocrine gland coordination Which gland releases hormones to control other glands? Tick one box. 06.3 · 1 mark Detection in homeostatic systems Cells in the pancreas detect changes in blood glucose concentration. What type of cell in the body detects changes?
AQA · GCSE · Chemistry
Chemical changes
01.1 · 2 marks Products of an acid–carbonate reaction Complete the word equation for the reaction. 01.2 · 1 mark Recognising excess copper carbonate Give one observation the student could make during Step 4 which shows that the copper carbonate is in excess. 01.3 · 1 mark Purpose of filtering excess solid Give one reason for filtering the mixture in Step 5. 01.4 · 1 mark Equipment for gentle heating Name the equipment that can be used to warm the filtrate gently in Step 6. 01.6 · 2 marks Choosing metals for salt preparation Some salts can be produced by reacting sulfuric acid with a metal. Neither copper nor sodium is used to produce a salt with... 02.3 · 2 marks Universal indicator in potassium hydroxide Potassium hydroxide solution is produced when potassium reacts with water. What is the colour of universal indicator when added...
AQA · GCSE · Chemistry
Quantitative chemistry
AQA · GCSE · Chemistry
Atomic structure and the periodic table
02.1 · 2 marks Comparing sodium and potassium electrons Give one similarity and one difference between the electronic structures of sodium and potassium. 02.2 · 2 marks Observing potassium reacting with water Give two observations made when potassium reacts with water. 02.4 · 2 marks Plotting Group 0 density data Plot the data from Table 1 on Figure 1. 02.5 · 1 mark Estimating krypton density from a graph Estimate the density (X) of krypton. Use Figure 1 and Table 1. 02.6 · 1 mark Predicting a halogen displacement reaction The elements in Group 7 are called the halogens. A more reactive halogen can displace a less reactive halogen from a solution of... 02.7 · 1 mark Trends down Group 7 Which of the following describes the trends going down Group 7? Tick one box. 03.1 · 2 marks Naming early atomic models Name the models of the atom shown in Figure 2. 03.2 · 4 marks Comparing plum pudding and current models Compare model A with the model of the atom used today. Use Figure 2. 03.3 · 2 marks Defining isotopes using subatomic particles Chadwick’s experiments showed the existence of neutrons in an atom. This led to an understanding of isotopes. Define the term...
AQA · GCSE · Chemistry