Question 1

A snail hides itself in its shell when touched. This shows that the snail is a living thing because it can

Accepted Answer

(3) respond. Living things respond to stimuli. The act of a snail hiding in its shell when touched is a direct response to a stimulus, indicating it is a living organism.

Question 2

Which one of the following statements is true for all insects?

Accepted Answer

(4) They have the same number of legs.. All insects, by definition, have three pairs of legs, totaling six legs. Not all insects live on land (some are aquatic), not all have wings (e.g., worker ants, fleas), and not all feed on other animals (many are herbivores or detritivores).

Question 3

Study the chart below. Which of the following are the missing questions A and B?

Accepted Answer

(2) Does it have a tail? Does it have wings?. The flowchart classifies 'fish, bird, mammal'. 
If Question A is 'Does it have a tail?', 'Yes' leads to fish (fish have tails). 
If 'No' from Question A, then Question B is 'Does it have wings?'. 'Yes' leads to bird (birds have wings). 
If 'No' from Question B, it leads to mammal (mammals typically do not have wings or a prominent tail as a primary distinguishing feature in this simple classification, and this path correctly identifies them). This set of questions provides a clear classification.

Question 4

Which one of the following living things can bear flowers?

Accepted Answer

(2) banana plant. Banana plants are flowering plants (angiosperms) that produce flowers, which then develop into fruits. Ferns are non-flowering plants that reproduce by spores. Mushrooms and bracket fungi are types of fungi and do not bear flowers; they also reproduce by spores.

Question 5

Ben compared two living things, P and Q. Difference: P does not make its own food but Q makes its own food. Similarity: Both P and Q reproduce from spores. What could P and Q be?

Accepted Answer

(4) mushroom fern. Fungi (like mushrooms) do not make their own food and reproduce by spores, fitting the description for P. Ferns make their own food through photosynthesis and reproduce by spores, fitting the description for Q.

Question 6

How is bacteria similar to fungi?

Accepted Answer

(4) Both need air, food and water.. All living organisms, including bacteria and fungi, require essential resources like air (or specific gases), food (nutrients), and water to survive and carry out their life processes. Not all fungi are microorganisms (e.g., large mushrooms). Bacteria reproduce by binary fission, not spores. Fungi do not make their own food; most bacteria do not make their own food but some can.

Question 7

Study the diagram below. The above diagram shows the ____ system.

Accepted Answer

(1) skeletal. The diagram illustrates the bones and framework of the human body, which constitutes the skeletal system. This system provides support, protection, and allows for movement.

Question 8

The picture below shows an organ system in the human body. Which of the following statements are true of the organ system? A: The organ system is made up of different parts. B: Without the organ system, oxygen cannot be absorbed into the body. C: The organ system removes carbon dioxide from the body.

Accepted Answer

(4) A, B and C. The diagram shows the respiratory system (lungs, trachea). 
Statement A is true for all organ systems. 
Statement B is true because the respiratory system is responsible for the intake of oxygen. 
Statement C is true because the respiratory system is also responsible for expelling carbon dioxide. 
Therefore, all three statements are correct.

Question 9

Study the description about an organ system in the human body as shown below. Produces digestive juices to break down food into simpler substances. Works together with another organ system A to push food down from one part to another. Which of the following is organ system A?

Accepted Answer

(2) muscular system. The description pertains to the digestive system. The muscular system, through actions like peristalsis (wave-like contractions of muscles), helps to push food along the digestive tract. Therefore, organ system A is the muscular system.

Question 10

Organ systems, P and Q are found in the human body. One of the functions of each organ system is described in the table below. Identify organ system P and organ system Q.

Accepted Answer

(1) skeletal digestive. Organ System P's function, 'Works with another body system to enable different parts of the body to move', best describes the skeletal system, which provides the framework for movement when muscles contract. Organ System Q's function, 'Stores undigested food until it is removed', clearly describes a role of the digestive system, specifically the large intestine and rectum.

Question 11

Which one of the following shows correctly how the food travels through a human digestive system in a healthy person?

Accepted Answer

(4) mouth → gullet → stomach → small intestine → large intestine → anus. The correct pathway for food through the human digestive system is: mouth → gullet (esophagus) → stomach → small intestine → large intestine → anus. Option (4) accurately represents this sequence.

Question 12

The diagram below shows a human digestive system. What would possibly happen when organ D is not functioning properly?

Accepted Answer

(2) Watery faeces will be passed out from the body.. Organ D is the large intestine. The primary function of the large intestine is to absorb water from the remaining indigestible food matter. If it is not functioning properly, insufficient water will be absorbed, leading to watery faeces being passed out.

Question 13

A model of the human digestive system was built as shown below. Each part of the model represents a part of the human digestive system. Use the model below to answer questions 13 and 14. Which one of the following part of the model correctly represents the part of the human digestive system?

Accepted Answer

(1) balloon stomach. In this model, the balloon best represents the stomach because the stomach is an expandable, muscular organ that churns food. A funnel represents the mouth or gullet entrance. A toothpaste tube represents the gullet (esophagus). Stockings represent the long, coiled intestines.

Question 14

If the rubber hose is the large intestine, it cannot perform the function of a large intestine. Which one of the following best explains why the rubber hose cannot perform the function of a large intestine?

Accepted Answer

(1) The rubber hose cannot absorb water.. The large intestine's main function is water absorption. A rubber hose is a non-porous material and cannot absorb water, thus failing to simulate this crucial function of the large intestine.

Question 15

On a stormy day, a tree fell onto a house as shown below. Which of the following best explains why the tree fell?

Accepted Answer

(4) The roots are not able to hold it firmly to the ground.. The primary role of roots in stabilizing a tree is to anchor it firmly in the soil. During a storm with strong winds, if the roots cannot provide sufficient anchorage, the tree can be uprooted and fall. While stem strength is a factor, the roots' ability to hold the tree in place against external forces is crucial.

Question 16

Study the plant below. Which part of the plant makes food?

Accepted Answer

(1) leaf. Leaves are the primary sites of photosynthesis in most plants, where sunlight, water, and carbon dioxide are converted into food (sugars). Roots absorb water and minerals, flowers are for reproduction, and fruits protect seeds.

Question 17

There are three similar adult plants, A, B and C. They are placed under the sun and watered every day. One part of each plant is removed completely as shown in the table below. After one month, which of the following plant(s) will not die?

Accepted Answer

(4) B and C only. Plant A (roots removed) will die as roots are essential for water and nutrient absorption. Plant B (fruits removed) and Plant C (flowers removed) will not die because fruits and flowers are primarily involved in reproduction and are not essential for the immediate survival of the parent plant. The plant can continue to photosynthesize and live.

Question 18

Study the table below. Which one of the following are suitable headings in place of X and Y?

Accepted Answer

(1) Objects Materials. Column X lists specific items: chopsticks, vase, knife, which are all types of 'Objects'. Column Y lists what these objects are made of: wood, ceramic, metal, which are 'Materials'. Therefore, 'Objects' for X and 'Materials' for Y are the most suitable headings.

Question 19

The camping tent shown below keeps out the rain and the sun. It can be folded easily when not in use. Which of the following most correctly states the properties of part R?

Accepted Answer

(3) No Yes Yes. Part R is the tent fabric. 
1. 'Keeps out the sun' implies it does not allow light to pass through easily, so 'Allows light to pass through': No. 
2. 'Keeps out the rain' implies it is 'Waterproof': Yes. 
3. 'Can be folded easily' implies it is 'Flexible': Yes. 
Thus, the correct combination is No, Yes, Yes.

Question 20

Which one of the following can be attracted by a magnet?

Accepted Answer

(1) iron ball. Magnets attract ferromagnetic materials such as iron, nickel, and cobalt. An iron ball would therefore be attracted by a magnet, whereas rubber, plastic, and wood are non-magnetic materials.

Question 21

Rajan was given a beaker containing small pieces of two materials, X and Z, mixed together. The properties of X and Z are given in the table below. Which property should Rajan use in order to separate the two materials in the shortest time?

Accepted Answer

(3) It can or cannot be attracted by a magnet.. Material Z is attracted by a magnet, while material X is not. Using a magnet to separate magnetic materials from non-magnetic materials is generally the most efficient and quickest method for such a mixture, assuming the pieces are small enough and accessible.

Question 22

The diagram below shows a flow chart. Which one of following is the missing question in the box?

Accepted Answer

(2) Can it be made into a magnet?. The flowchart classifies materials into 'Magnetic Material' and 'Non-magnetic Material'. The defining characteristic of a material being magnetic (specifically ferromagnetic) is its ability to be magnetized, meaning it 'can be made into a magnet'. While some metals are magnetic, not all are, and not all magnetic materials are metals, making 'Is it a metal?' less precise. Options (3) and (4) describe properties of an existing magnet, not necessarily a material's potential to become one.

Question 23

Jill stroked two similar iron rods, A and B, with the same magnet as shown below. Both rods became magnets. Rod A attracted fewer pins than rod B. Which one of the following shows the possible number of strokes used for rod A and rod B respectively?

Accepted Answer

(2) 15 30. The strength of a magnet created by the stroking method is generally proportional to the number of strokes applied, up to a saturation point. Since Rod A attracted fewer pins than Rod B, Rod A is a weaker magnet. This means Rod A must have been stroked fewer times than Rod B. Option (2) '15 30' shows Rod A stroked 15 times and Rod B stroked 30 times, which aligns with Rod A being weaker than Rod B.

P3 Science SA2 2023 — Rosyth

Related papers