science - end of year test 2022
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45 questions
| 🇬🇧 | 🇬🇧 |
| What are the three states of matter? | Solid, liquid and gas |
| What can we use to identify an object as a solid? | A solid can't be compressed, has a fixed volume, has a fixed shape and can't flow |
| What can we use to identify an object as a liquid? | A liquid can't be compressed, has a fixed volume, doesn't have a fixed shape and can flow |
| What can we use to identify a gas? | A gas can easily be compressed, doesn't have a fixed volume, doesn't have a fixed shape and can flow |
| Why can't a solid be compressed? | Particles don't move around, they only vibrate on the spot |
| Why can't a liquid be compressed? | Particles are close together and most are touching |
| Why can a gas be compressed?` | Particles are very far a[art with lots of space between them |
| Why does a solid have a fixed volume? | The forces of attraction (bonds) between the particles are very strongly holding the particles together |
| Why does a liquid have a fixed volume? | The forces of attraction (bonds) between the particles are strongly holding the particles together |
| Why doesn't a gas have a fixed volume? | The forces of attraction (bonds) between the particles are very weakly holding the particles together |
| Why does a solid have a fixed shape? | Particles are arranged in a regular pattern and are fixed to their neighbours |
| Why doesn't a liquid have a fixed shape? | Particles are not arranged in a regular pattern and always change neighbours, the particles are free to move |
| Why doesn't a gas have a fixed shape? | Particles are spread out in a very irregular pattern and are free to move |
| What is diffusion? | Diffusion is the movement of an area of high concentration to a low area of concentration |
| What states of matter can diffusion occur in? | Liquid and gas |
| What is the process of a gas becoming a solid called? | Deposition / desublimation |
| What is gas pressure? | Gas pressure is the preessure is the pressure of gas on the outside or the inside of a container |
| What is a substance? | A substance is made up of only one type of particle and can be any state of matter |
| What is chromotography used for? | Chromotography is used to seperaate coloured from non-coloured substances that are soluble in the same solvent |
| Why don't you write the labels in ink in chromotography? | The ink would also run up the page |
| What do you use to identify living organisms? | You use MRSGREN |
| What does MRSGREN stand for? | M - move r - reproduce s - senses (sensitivity) g - grow r - respire e - excretion n - nutrients |
| What is a tissue? | A tissue is a wall of cells |
| What is an organ? | An organ is large connection of tissues |
| What are the parts of an animal cell? | The parts of an animal cell are the ribosome, the nucleus, the cytoplasm, the mitochondria, and the cell membrane |
| What are the parts of the plant cell? | The parts of a plant cell are the nucleus, the cytoplasm, the cell membrane, the mitochondria, the vacuole, the chloroplast, and the cell wall |
| What is eukaryotic cell? | Eukaryotic cells are complex and include animal and plant cells |
| What are prokaryotic cells? | Prokaryotic cells are simple; single cells and include bacteria |
| What is the purpose of the nucleus? | The nucleus controls the activity of the cell |
| What is the purpose of the mitochondria? | The mitochondria is where respiration occurs and releases energy |
| What is the purpose of the chloroplast? | The chloroplast absorbs light energy and changes it into food |
| What is the purpose of the ribosome? | The ribosome synthesises proteins |
| What is the purpose of the cell wall? | The cell wall supports the cell and helps keep its shape |