Name: Mode of Study: Student Number: Qualification: Instruction: Answer all the questions on the questions paper.

Transcription

1 Name: Mode of Study: Student Number: Qualification: Instruction: Answer all the questions on the questions paper. SECTION A: BIOLOGY QUESTION 1 [20 MARKS] Question Type: Multiple Choices. Each answer equals 2 marks. 1.1 A substance needed by the body for growth, energy, repair and maintenance is called a. [2] A. nutrient B. carbohydrate C. calorie D. lipid 1.2 All of the following are nutrients found in food except. [2] A. proteins B. carbohydrates C. plasma D. vitamins 1.3 A diet high in saturated fats can be linked to which of the following? [2] A. kidney failure B. rickets C. anorexia D. cardiovascular disease 1.4 A mineral that the body needs to work properly especially to absorb Vitamin D is. [2] A. calcium B. iron C. magnesium D. lead 1.5 Fibre cannot actually be digested; however, it is an important part of our diet for various reasons. One of the following reasons is wrong, identify which. [2] A. As it remains undigested it passes through the entire gut from mouth to anus and thus keeps food moving smoothly through our system. B. It causes constipation. C. The fibre absorbs poisonous waste from the digested food. D. High fibre diets are believed to reduce the risk of heart disease, bowel cancer and cholesterol in the body. Page 1 of 6

2 1.6 One function of a carbohydrate is. [2] A. keep the heart functioning smoothly B. store and transport genetic material C. to provide the body with immediate energy D. control the rate of reactions 1.7 The three types of carbohydrates are. [2] A. glycerol, polysaccharide, monosaccharide B. disaccharide, monosaccharide, glycerol C. glycerol, monosaccharide, polysaccharide D. monosaccharide, polysaccharide, disaccharide 1.8 What elements make up a carbohydrate? [2] A. hydrogen, calcium, oxygen B. carbon, potassium, oxygen C. hydrogen, oxygen, carbon D. calcium, potassium, oxygen 1.9 Glycogen, a polysaccharide, in your liver may be broken down to glucose by the process of. [2] A. hydrolysis B. dehydration synthesis C. condensation D. isomerization 1.10 Water makes up roughly 65% of our body weight. We take in water when we eat and drink. All the following statements are correct except [2] A. Water is important because chemical reactions in our cells take place in water. B. Waste products are passed out of our bodies in blood. C. Our blood transports substances that are dissolved in water D. Water is in sweat that cools us down SECTION B: CHEMISTRY QUESTION 1 [20 MARKS] Question Type: Multiple Choices. Each answer equals 2 marks. 1.1 In the metric system, the basic unit for mass is the. [2] A. Gram B. Pound C. Ton D. Kilogram Page 2 of 6

3 1.2 Which is NOT a unit of measurement in the SI system? [2] A. inch B. meter C. g/ml D. g/cm How many millimeters are in 24 cm? [2] A. 240 B C. 24,000 D. 240, The amount of space an object occupies is known as its. [2] A. density B. volume C. mass D. time 1.5 The ability of a measurement to be consistently reproduced is referred to as. A. accuracy B. qualitative C. quantitative D. precision 1.6 The amount of gravitational force on an object is known as its. [2] A. mass B. mole C. weight D. area 1.7 What is the density of a 61.8 g cube that is 2.3 cm wide, 4.0 cm tall, and 3.2 cm long? [2] A. 6.5 g/cm 3 B. 2.1 g/cm 3 C g/cm 3 D. None of the above 1.8 Which of the following measurements has the greatest number of significant figures? [2] A ml B ml C ml D x 10 9 ml [2] Page 3 of 6

4 1.9 If the temperature of a freezer is equal to o F, what would the temperature of a freezer be in o C? [2] A o C B o C C o C D. None of the above 1.10 a cyclist travels a distance of 0.5 Km in a time of 0.5 hours. The speed of the cyclist in SI units is equal to. [2] A m/s B. 0.3 m/s 2 C. 1 Km/h D. None of the above SECTION C: PHYSICS QUESTION 1 [20 MARKS] Question Type: Multiple Choices. Each answer equals 2 marks. 1. A disturbance that transfers energy through a medium from one location to the other is known as [2] (a) Gas (b) Sound (c) Potential energy (d) Wave 2. Waves that are produced by means of charged particle accelerations [2] (a) Mechanical waves (b) Ocean waves (c) Electromagnetic waves (d) S-Type earthquake waves 3. Which type of wave vibrates forming 90 o to the direction of motion of the wave? [2] (a) Transverse wave (b) Longitudinal wave (c) Both transverse and longitudinal wave (d) None of the above Page 4 of 6

5 4. A distance between any two repeating points on a wave [2] (a) Amplitude (b) Wavelength (c) Velocity (d) Frequency 5. Mechanical waves travel slower through [2] (a) Gas (b) Solid (c) Liquid (d) Denser mediums 6. What is the wavelength of a sound wave with a frequency of 0.05 KHz? (Speed of sound is 900 Km/h). [2] (a) 230 m (b) 50 Hz (c) 250 m/s (d) 5 m 7. A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 x 10 6 μm. What is the speed of sound in steel? [2] (a) 6.51 x 10 9 m/s (b) 6.51 x 10 3 m/s (c) 1.69 x 10 4 m/s (d) 5.90 x 10-5 m/s 8. Energy transferred from the sun to the surface of the earth is known as [2] (a) Sound energy (b) Solar energy (c) Earthquake (d) Potential energy 9. Earthquake waves travel in the form of [2] (a) Microwaves (b) Longitudinal waves (c) Light waves (d) Transverse waves Page 5 of 6

6 10. When molecules are given extra space and allowed to expand. [2] (a) Rarefaction (b) Compression (c) Crest (d) Trough TOTAL MARKS: 60 THE END Page 6 of 6