PSLE Science — Core Concepts (P5–P6)

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1. 1

   State three needs that all living things share.

   答案All living things need air, food and water to stay alive. They use these needs to grow, respond to changes around them and reproduce.

   These needs are shared by every living thing, from tiny ants to tall rainforest trees, and they set living things apart from non-living things.

2. 2

   Which one of the following shows that a plant is a living thing?

   1. 1It can grow and reproduce
   2. 2It stays in one place all its life
   3. 3It has green leaves
   4. 4It dries up in hot weather

   答案It can grow and reproduce

   Growing and reproducing are life processes that only living things carry out. Staying still, being green and drying up do not show that something is alive.

3. 3

   Plants cannot respond to changes around them because they cannot move from place to place.

   1. 1True
   2. 2False

   答案False

   Plants do respond to changes, but their responses are slow. For example, stems grow towards light and roots grow towards water.

4. 4

   What is the difference between a vertebrate and an invertebrate?

   答案A vertebrate has a backbone, while an invertebrate does not have a backbone. Fish, amphibians, reptiles, birds and mammals are the five groups of vertebrates.

   Insects, spiders, crabs, snails and worms are examples of invertebrates.

5. 5

   Which of the following animals is an invertebrate?

   1. 1Housefly
   2. 2Guppy
   3. 3Pigeon
   4. 4Hamster

   答案Housefly

   A housefly is an insect, so it has no backbone. A guppy, a pigeon and a hamster all have backbones, so they are vertebrates.