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A substance that increases the hydrogen ion concentration of solution is known as a(n) ___________. 

Question 11 RIGHT Click on the blue button to view the diagram The diagram shows the front face of a barn. The width of the barn is 12m. The height of the barn is 8m. The sides of the barn are both of height 5m. 11.1 Work out the area of the front face of the barn  [3] RIGHT Click on the blue button to view the diagram 11.2 The length of the barn is 15m. Work out the volume of the barn. [3]

Question 3 3.1 Write as a single fraction in its simplest form: [2]

Question 7 RIGHT Click on the blue button to view the diagram The line l passes through the points (10,0) and (0,8) as shown in the diagram. 7.1 Find the gradient of the line as a fraction in its simplest form. [2] 7.2 Write down the equation of the line parallel to l which passes through the origin [2] 7.3 Find the equation of the line parallel to l which passes through the point (3,1)   [2]

Solve:        2c + 1 = 13

QUESTION 3 TRANSACTIONAL WRITING – source based Read TEXT A entitled “Plane in ‘serious incident’ after every ‘Miss’ on board was assigned child’s weight” and consider the visual labelled TEXT B, then answer the question below.  Right-click on the buttons below to open TEXT A and TEXT B in a new tab. TEXT A TEXT B

A scientist wants to study the effects of a new Drug X on cancer cell growth. Equal numbers of cancerous liver cells are grown on ten plates in a lab.  Drug X is added to five plates.  Water is added to the other five plates.  The ten plates of cancerous cells are incubated at 37 Celsius for two days.  After two days the plates are removed from the incubator and the number of cells is counted on each plate.   What is the control group? 

A substance that decreases the hydrogen ion concentration of a solution is known as a(n) _________. 

Read the following weights as if the weights of each bar are at the point of the arrows: Weight ___________  

What does NaOH stand for?