Biology
What is the process called when plants convert water and carbon dioxide into oxygen?
Photosynthesis
Litmus paper was used in a window cleaner and turned blue, what does this show?
The window cleaner is a basic substance
What is the next number in the sequence: 2, 3, 5, 7, ___?
11
What happens when 2 positive electrical charges are placed next to each other?
They repel each other
What acid in the stomach is used to break down foods?
HCl / Hydrochloric acid
Why does the surface of the ice feel wet when you touch it?
The surface of the ice absorbs heat from the human body, which is sufficient to start melting the ice, hence making it slippery.
If a triangle has angles measuring 30 degrees, 60 degrees, and 90 degrees, what type of triangle is it?
Right Angled Triangle
Inside of a magnet, the field lines flow from...
South pole to north pole
Which process involves the conversion of glucose into energy in the absence of oxygen?
Anaerobic respiration
In an experiment, hydrochloric acid is reacted with sodium hydroxide. This gives rise to water and sodium chloride. What would be the pH of sodium hydroxide and that of the resultant solution?
Sodium hydroxide: pH is 12 to 14 (any number between this is accepted)
Resultant solution: pH is 7
In a pair of vertically opposite angles, one angle measures 120º and the other measures (37 + m)º. What is m?
83
The higher the frequency of wavelengths, the _____ the wavelength.
shorter
What organelle is responsible for breaking down and digesting cellular waste and foreign substances in a cell?
Lysosome
Why are group 18 elements found monoatomic in nature?
They have full a valence shell, therefore not requiring to bond with another atom.
If a right triangle has a hypotenuse of 10 units and one leg of 6 units, what is the length of the other leg?
8 units
What is a "frame of reference"?
A relative to which motion and rest is measured
Goats are herbivores. Humans are able to gain energy by eating both animals and plants. Suggest reasons why goats have a higher number of premolar and molar teeth than humans.
Cud chewing and so molars and premolars for chewing and grinding. Accept more mastication.
Sun heats up the air in the bicycle tires. This causes the pressure of the air in the tires to increase. Describe, in terms of the motion of the air molecules, why the pressure of the air in the tire increases as the temperature of the air increases.
Air molecules move faster because of higher kinetic energy. Increased/more collisions per unit area. (Both reasons are required, if only one is right then no points will be awarded)
A shopkeeper sells candles in packets of 12 and candle stands in packets of 8. What is the least number of candles and candle stands Nita should buy so that there will be one candle for each candle stand?
24
A car has two identical headlamps. The lamps are connected in parallel to a 12V battery. A single switch is used to turn on both lamps. The resistance of each lamp is 3 Ohms, calculate the current in each lamp when lit.
4 Amps