3rd Form Upper Exam - Science

\` **Instructions**: Please Read before you begin. This paper has three sections, **SECTION ONE** ,**SECTION** **TWO and SECTION THREE.** Section one has twenty **(20) MULTIPLE CHOICE** questions with ONE MARK allotted for each correct answer. Circle the letter for the response with the correct an...

\` **Instructions**: Please Read before you begin. This paper has three sections, **SECTION ONE** ,**SECTION** **TWO and SECTION THREE.** Section one has twenty **(20) MULTIPLE CHOICE** questions with ONE MARK allotted for each correct answer. Circle the letter for the response with the correct answer. Section two is made up of **ELEVEN** **s**tructured questions. Section three consists of **TWO** options, choose **ONLY ONE**.**Answer ALL Questions from this section.** **Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Class: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** Teacher: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 1. Which of the following structures is primarily responsible for the transport of water and minerals in plants? A\) Phloem B\) Xylem C\) Stomata D\) Root hairs 2. What is the primary function of phloem in plants? A\) Transport of water B\) Transport of sugars and nutrients C\) Photosynthesis D\) Gas exchange 3. What is the primary gas used by humans during the process of cellular respiration? A\) Carbon Dioxide B\) Oxygen C\) Nitrogen D\) Hydrogen 6\. What is the primary function of photosynthesis in plants? A. To absorb nutrients from the soil B. To convert light energy into chemical energy stored in glucose C. To release carbon-dioxide into the atmosphere D. To generate heat energy for the plant 7\. Which of the following is the correct word equation for photosynthesis? A. Carbon-dioxide +Water \> Glucose + Oxygen B. Carbon-dioxide +Water +Light energy \> Glucose + Oxygen C. Glucose + Oxygen \> Carbon-dioxide + Water D. Light energy + Chlorophyll \> Glucose + Oxygen 8\. Which pigment is primarily responsible for absorbing light energy during photosynthesis? A. Carotenoids B. Xanthophyll C. Chlorophyll D. Anthocyannis 9.What is the purpose of boiling a leaf in water before testing for starch? A. To extract chlorophyll B. To kill the leaf and soften it C. To remove all nutrients D. To enhance starch production 10.Which reagent is commonly used to test for the presence of starch in a leaf? A. Benedict's Solution B. Iodine Solution C. Biuret Reagent D. Litmus Solution 11\. After adding iodine solution to a boiled leaf, what colour indicates the presence of starch? A. Red B. Yellow C. Blue-black D. Green 12\. How do plants primarily move water from their roots to their leaves?\ A) Through photosynthesis\ B) By active transport\ C) Via transpiration pull\ D) Through diffusion 13\. What is the role of the xylem in water movement in plants?\ A) It stores water\ B) It transports water from roots to leaves\ C) It facilitates gas exchange\ D) It absorbs sunlight 14\. What is the process called when water evaporates from the leaves, creating a pull to move water upward?\ A) Osmosis\ B) Transpiration C\) Respiration\ D) Photosynthesis 15\. What is the function of stomata in the process of water movement in plants?\ A) Absorb nutrients\ B) Release oxygen\ C) Control water loss\ D) Store water 16\. Which word equation correctly describes aerobic respiration?\ A) Oxygen + Water → Glucose + Carbon Dioxide + Energy\ B) Glucose + Oxygen → Carbon Dioxide + Water + Energy\ C) Carbon Dioxide + Glucose → Oxygen + Water + Energy\ D) Glucose + Water → Oxygen + Carbon Dioxide + Energy 17\. Which of the following is a byproduct of respiration?\ A) Nitrogen\ B) Oxygen\ C) Carbon Dioxide\ D) Hydrogen 18\. What is an example of an insect that is considered a plant pest?\ A) Ladybug\ B) Honeybee\ C) Mushroom\ D) Earthworm 19\. Which of the following can be an environmental effect of chemical plant control methods?\ A) Improved soil fertility\ B) Water contamination\ C) Increased biodiversity\ D) Enhanced plant growth 20\. Which of the following is an example of a fungal plant pest?\ a. Rust\ b. Grasshopper\ c. Mite\ d. Termite (20 mrks) **[SECTION TWO]** 1. Use the above diagram to indicate the soil type represented based on drainage ability. I \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ II \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ III \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ( 3 mrks) 2. Using the diagram as reference, indicate where the chlorophyll is found ,giving its importance. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (2 mrks) 3. Explain the process by which plants transport water from their roots to their leaves, considering the roles of cohesion, adhesion, and transpiration. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (5 mrks) 4. How effective is using a celery stalk and food coloring experiment to demonstrate water transport in plants. Consider the strengths and limitations of this method. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ( 3 mrks) 5. Define respiration \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (1 mrk) 6. Define photosynthesis \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (1 mrk) 8\. (a) List three benefits and risks of using this method of pest control that would use ladybugs to control aphid populations in gardens. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ \- \(b) State the type of pest control method used in this scenario. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (4 mrks total) 9\. Give two examples of mechanical pest control methods, and why might they be preferred over chemical methods? \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 10.Outline three characteristics of sandy soils \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (3 mrks) 11\. Give two ways in which clay soil differs from sandy soil in terms of water retention. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (2 mrks) 1. Write the correct letter that explains the function of each part of the flower below: Filament \_\_\_ A Holds up the anther Petal \_\_\_ B The sticky part of the flower that collects pollen Stigma \_\_\_ C Attract Pollinators Pistil \_\_\_\_ D The ovule producing part of the flower. ( 4 mrks) 2, Which part of the plant produces pollen grains? \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (1 mrk) OR 1. What is the most important function of chloroplast? \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ (1 mrk) 2. Match the soil type with the corresponding characteristics. A-Sand \_\_\_\_\_\_\_ B- Silt \_\_\_\_\_\_\_ C-Clay \_\_\_\_\_\_\_ D -- Loam \_\_\_\_\_ 1.- Fine particles that retain moisture well and are fertile 2\. - Very small particles that have high plasticity and become compacted easily 3\. - Coarse particles, that have large air spaces between them. 4\. - Balanced soil that allows correct moisture level and particle size for cultivation (4 mrks) TOTAL (50 MRKS)