P6 Science SA1 2016 — Henry Park

The diagram below shows the three states of a substance. Arrows A, B, C and D represent whether heat is 'lost' or 'gained' by the substance during each change of state. Which one of the following best represents the four arrows, A, B, C and D as shown in the diagram above?

Simon completely filled two identical syringes, one with air while the other with water, and covered them with black paper as shown in the diagram below. He then pushed each plunger as hard as he could and measured the distance, x. Which one of the following shows the correct values of x?

Study the diagram below. Based on the diagram above, which of the following statements are correct? A: P is a magnet. B: Q can be magnetised. C: R can attract iron nails. D: P and Q are non-magnetic.

The table below shows the state of four different substances, A, B, C and D, at different temperatures. Which substance has the highest melting point?

Study the properties of A and B below that represents two states of water. A: Has no definite shape and volume. B: Has no definite shape but has definite volume. What process takes place when A changes into B?

The diagram below shows a way to separate magnetic metals from non-magnetic metals. Mr Tan poured objects T and U on the moving belt. The arrows show how the belt moves. Based on the above diagram, which of the following are correct? A: Object U is magnetic, but T is not. B: Object U is made of nickel while object T is made of copper. C: The moving belt is a strong magnet.

Houses in cold countries often have windows that are constructed using two pieces of glass panes as shown below. What is the advantage of having such windows in cold countries?

The diagram below shows an electric circuit with four identical bulbs. How many bulbs will remain lit in the circuit when bulb A or B is fused?

An air-tight container contains substance X and plunger is pushed down as shown below. Which of the following statements about substance X are correct when the plunger is pushed down? A: Volume of X decreased. B: Volume of X remains the same. C: Mass of X decreased. D: Mass of X remains the same.

Tim used some identical bulbs and some identical batteries in each of the set ups below (Set up A, Set up B, Set up C and Set up D). Which of the following set ups will have all the bulbs lighting up with the same brightness?

Mrs Lim removed a bottle of milk from the refrigerator and placed the bottle in a mug containing hot water as shown below. Which of the following statements are correct? A: The cold milk loses heat to the hot water. B: The mug gains heat from the hot water. C: The hot water loses heat to the cold milk. D: The temperature of the cold milk decreases.

Alan wants to find out whether the number of batteries affects the strength of an electromagnet. Which two arrangements below should he set up to conduct a fair test?

Which of the following graphs below shows how the temperature of a block of ice placed at room temperature changes with time correctly?

Kim placed object X on top of object Y and heated them over a candle flame as shown below. The diagram shows the appearance of objects X and Y before and after heating. Only object X was burnt. Which one of the following correctly shows properties of objects X and Y?

Bryan wanted to find out if water at different temperatures would evaporate at different rates. He set up the experiment as shown below and put them at the same place. He recorded the water level for both cups at regular intervals. Cup A: 50 ml of water at 80°C. Cup B: 50 ml of water at 50°C. Which one of the following graphs correctly shows the change in water levels for both cups after ten minutes?

Which of the following shows the correct order of processes observed in the reproduction and growth of flowering plants?

The table below shows some of the physical characteristics of Jack and his parents. Which one of the following statements is correct?

Brandon drew the diagram below to show how sugar and water are transported to and from different parts of the plant represented by J, K and L. Which of the following parts of the plant are best represented by J, K and L?

Alexander carried out an experiment in a dark room as shown in the diagram below. He first exposed a stalk of hydrilla to a lit light bulb connected to 1 battery. After 4 hours, he measured the volume of oxygen collected in the test-tube. He then repeated the whole experiment using different number of batteries. The batteries used were new and identical and they were arranged in series. Which one of the following graphs best represents the amount of oxygen collected when using different number of batteries?

Compare the two fruits below (Fruit A and Fruit B). Based on your observation of the characteristics of the fruits shown above, which of the following shows how the fruits are dispersed?

The graph below shows how temperature affects the number of 2 types of plants, X and Y. Based on the information given in the graph, 4 pupils made the following conclusions. Wei En: X reproduces most at 30°C. Ritvik: The higher the temperature, the fewer Y. Alvin: The higher the temperature, the fewer X. Raju: There are more Y than X between 25°C and 40°C. Who made the correct conclusion?

Which of the following comparison(s) about plants is/are correct? A: Photosynthesis – Light is needed; Respiration – Light is not needed. B: Photosynthesis – Carbon dioxide is taken in; Respiration – Carbon dioxide is given out. C: Photosynthesis – Oxygen is taken in; Respiration – Oxygen is given out. D: Photosynthesis – Takes place in the presence of light only; Respiration – Takes place in darkness only.

Jerry has two flowers, X and Y, of the same species. The diagram below shows one of the flowers. Some parts of the flowers were removed. The diagram below shows the two flowers with some parts removed. Explain why pollination could take place between flowers X and Y.

The table below shows the characteristics of living things, X, Y and Z. Which of the above statements are correct? A: Makes its own food (X Yes, Y No, Z No). B: Reproduce by seeds (X No, Y No, Z No). C: Breaks down dead matter (X No, Y Yes, Z No). D: Responds to changes (X Yes, Y No, Z Yes).

Janice had two similar pots of soil (Y and Z). She placed ten maize seeds in each pot. She placed Pot Y in a cupboard and Pot Z near the window. She watered the pots of plants with an equal amount of water daily. The average heights of the plants were recorded in the table below. Based on the information provided, which of the following statement(s) is/are true? A: All the seeds started to germinate on the 4th day. B: There is an increase in the average height of the plants in Pot Y and Z over 7 days. C: The average height of the plants grown in the bright area was taller than those grown in the dark.

Jenny wanted to find out how the amount of carbon dioxide would affect the rate of photosynthesis. She set up her experiment as shown below. Adding baking soda increases amount of carbon dioxide in the water. Which of the following variables should she keep the same for a fair test? A: The type of funnel. B: The amount of light. C: The amount of water plant. D: The amount of baking soda.

Below are the early stages (W, X, Y and Z) of plant growth. Which of the following describes the early stages of plant growth correctly? A: Seed leaves provide food for the seed at stages X and Y. B: The seedling is able to make food at Stage Z. C: Shoots appear before the roots at stage X.

Nemo used a leaf as shown in Diagram A for an investigation on photosynthesis. The leaf was de-starched before the start of the experiment. He then covered part of the leaf with black paper as shown in Diagram B. He put the plant under the Sun. Two days later, he plucked off the leaf and removed the black paper. He used iodine to test for starch in the leaf. In which area A, B, C or D was most starch found?

The diagram below shows the human digestive system. Goofy, Harry and Sammy each made a statement about the digestive system. Goofy: Solid waste is stored here. Harry: Digestion is completed here. Sammy: Digestive juices are added here. Which one of the following correctly matches each statement made by each boy to the corresponding labelled parts of the digestive system above?

In animal reproduction, fertilization takes place when G from Part A fuses with H from Part B to form a fertilised egg. Male Part A Produces G; Female Part B Produces H; G + H → Fertilised Egg. Which of the following correctly represent A, B, G and H from the diagram above?

John wanted to find which metal rod, A, B or C is a better conductor of heat. He used three metal rods of the same size and thickness. The experiment was conducted at a room temperature of 32°C. He placed metal rod A in the container as shown below and recorded the change in the temperature of water in the container over 30 minutes. The steps were repeated with metal rods B and C. The result of his experiment is shown in Table Y (Temperature of water in container at 0, 10, 20, 30 min for Rods A, B and C). (i) Based on table Y, state one step John has taken to ensure that the experiment is carried out fairly. Explain why this step is important. [2] (ii) If the plastic container is replaced by a metal container of the same thickness, explain the difference in the temperature of water over the 30 minutes. [1] (b) Meena poured different amounts of water in four identical beakers and heated the water until it started to boil. She observed and recorded the time taken for water in each container to boil (150 ml→3 min, 450 ml→11 min, 350 ml→8 min, 250 ml→5 min). Put a tick against statements that are correct: (i) Amount of water in each beaker affects its boiling point. (ii) Amount of heat in each beaker, as the water boils, is different. (iii) Amount of water in each beaker affects how fast the water boils. (iv) Temperature of water in each beaker, as the water boils, is different. [1]

Christopher set up a model of the water cycle as shown below (an ice cube on a plastic sheet held by a rubber band over a jar of hot water). a) What was the purpose of putting an ice cube on top of the plastic sheet? [1] b) After a few minutes, he noticed water droplets on the bottom of the plastic sheet. Explain how the water droplets were formed. [2]

Mei Chen set up the experiment shown below using four identical insulated cups, A, B, C and D. A: metal rod, water at 70°C. B: metal rod, water at 20°C. C: plastic rod, water at 70°C. D: plastic rod, water at 20°C. a) Mei Chen observed and recorded the temperature of the water in each cup after 10 minutes. Which cup, B or D, would have water with the higher temperature after 10 minutes? Explain your answer. [2] b) After 15 minutes, will the difference in temperature between the water in cups A and D be greater or smaller? [1]

Asif carried out an experiment with two bar magnets, P and Q, and some iron nails. The diagram shows the maximum number of iron nails that can be attracted by each magnet (magnet P holds more nails at its ends than magnet Q). a) What common property about the strength of the poles could Asif observe about the 2 magnets? [1] b) What can be concluded about the difference in the strength of the two magnets? Explain how you arrived at the answer. [2]

The table below shows the amount of digested food and whether the digestive juice is produced in different parts (A, B, C, D and E) of the human digestive system during an experiment. (A: None digested, No juice; B: Small amount, No juice; C: Large amount, Yes juice; D: Very small amount, Yes juice; E: Almost all, Yes juice.) Based on the information from the table, which part (A, B, C, D or E) represents the gullet in the human digestive system? Explain why. [2]

Tom filled 3 identical jars with the same amount of water. He put a plant of similar size each in Jar B and Jar C. He poured a layer of oil on the water surface of Jar C. The 3 jars were placed next to an open window. a) He recorded the results of his experiment in the table below (Volume of water at start: Jar B 300 ml, Jar C 300 ml; Volume after 2 days: Jar A 275 ml, Jar B 225 ml). Complete the table. [2] b) The diagrams show the changes in a leaf seen under a microscope. X is a tiny opening found in leaves. When the plant is placed under strong light, it is observed that the size of X increases. Explain why X becomes larger. [2]

Beng Lee fitted a bottle with a funnel using plasticine as shown below. a) He poured coloured water into the funnel and realised that the water did not flow into the bottle. Give a reason for this. [1] b) A glass tube was given. Using the diagram, draw how the glass tube should be placed to allow more coloured water to enter the glass bottle. [1] c) Give a reason for your answer in (b). [1]

The diagram below shows a rice weevil which is often found in rice. Rice weevils feed on rice and they pose a problem to people as they are often found in large numbers. Amy made this hypothesis: 'The presence of pandan leaves keeps rice weevils away from rice bins.' She planned an investigation using only the following items: 600 g of uncooked rice, 3 stalks of pandan leaf, 20 rice weevils, 1 large tray divided into 2 parts. a) The following steps show how Amy carried out the experiment. Write down the 3rd step. Step 1: Fill each part of the tray with 300 g uncooked rice. Step 2: Put in 10 rice weevils in each part of the tray. Step 3: ____ Step 4: Compare the number of weevils in each part of the tray at the end of the experiment. [1] b) At the end of the experiment, Amy concluded that her hypothesis is correct. What observation had she made that caused her to make this conclusion? [1]

Three plants Q, R and S are planted along a river as shown on Map Y. Map Z shows the same piece of land 2 years later (S has multiplied into a dense cluster near its original spot; Q has spread along/down the river; R has spread around its original position). a) Which plant, Q, R or S is most likely to be dispersed by the explosive action of its fruits? Explain your answer. [1] b) How are the fruits of Plant Q likely to be dispersed? [1] c) Based on your answer in (b), give two characteristics that the fruits of Plant Q may possess. [2]

Muthu left a slice of bread on top of a table in the kitchen. After a few days, he noticed that there were dark patches of bread mould on the bread. a) Bread mould belongs to a group of living things. Name the group. [1] b) How does the bread mould reproduce? [1]

The table below shows the freezing point and boiling points of three substances, X, Y and Z. (X: freezing 29°C, boiling 678°C; Y: freezing 17°C, boiling 118°C; Z: freezing −7°C, boiling 59°C.) a) What are the states of substances, X and Y, at 20°C? Write your answers in the boxes of the table below. [2] b) Other than having mass and occupying space, state another property of substance Z when it is at 100°C. [1]

The figure below shows the cross section of a flower (Part A = stamen/anther, the male reproductive part; Part B = ovary; Part C = petal). Describe what will happen to Parts B and C after fertilisation. [2] (a) Part B – ____ Part C – ____ (b) Can fertilisation occur if Part A is removed? Explain your answer. [1]

Study the following diagram about organisms, A, B, C and D carefully. (Flowchart: Start → 'Lays eggs?' — Yes → 'Can fly?' — Yes → C, No → D; 'Lays eggs?' — No → 'Has hair?' — Yes → B, No → A.) Use information from the diagram to answer the following questions. (a) Jane concluded that organism C is definitely a bird. Do you agree? Give a reason for your answer. [1] (b) Name one difference between organisms A and B. [1]