1645800
Description
Flashcards by schoolstudy1, updated more than 1 year ago
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Created by schoolstudy1
about 10 years ago
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| Question | Answer |
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what is this called?
Image:
science_pic (image/png)
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this is a PIPETTE |
| what is a molecule? | a molecule is the smallest part of an element or compound that can exist on its own / two or more atoms grouped together |
| explain the term "mixture". | a mixture is two or more substances mixed together without a chemical reaction |
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what is this called?
Image:
conical_flask (image/jpg)
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a conical flask |
| what is an element ? | an element is a substance that cannot be split into any simpler substances by chemical means. e.g copper ,gold ,hydrogen,chloride |
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what kind of molecules does a solid have?
Image:
solid (image/png)
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a solid has tightly packed molecules so there is no space for them to move. |
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what kind of molecules does a liquid have?
Image:
liquid (image/png)
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a liquid has closely packed molecules with a little bit of space so that the liquid can flow. |
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what kind of molecules does gas have?
Image:
gas (image/png)
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gas has very loosely packed molecules scattered about the place which means they have loads of space to move so the gas difuses. |
| what is an atom? | an atom is the smallest part of an element that still has the same properties of that element. e.g CO2 |
| explain a physical change. | a physical change is one in which no new substance is made e.g tearing paper |
| explain a chemical change. | a chemical change is a change in which a new substance is made. e.g burning paper, rusting , milk going sour |
| what is a compound? | a compound is 2 or more elements chemically combined. e.g water, sodium chloride , carbon dioxide |
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name the parts of this microscope.
Image:
microscope (image/png)
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what does this symbol mean?
Image:
oxidising (image/png)
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it means oxidising. (causes flammable substances to burn more fiercely) |
| this is a diagram of a plant cell. label the drawing | a- cell wall b- large central vacuole c- nucleus d- cytoplasm e- chloroplasts |
| name two differences between plant cells and animal cells | 1) plant cells have a large central vacuole animal cells don't 2) plant cells have a cell wall. |
| what do you use to stain plant cells so you can see them under the microscope? | iodine. |
| what is a tissue? | it's a group of similar cells with a special function (e.g muscle,nerve) |
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what is an organ?
Image:
heart (image/jpg)
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an organ is a group of different tissues that work together to carry out a special function. e.g the heart, the ears,stomach lungs. |
| what is a system? | a system is a group of organs working together . e.g the digestive system |
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name this piece of equipment and label the main parts.
Image:
bunsen_burner (image/png)
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this is called a Bunsen burner |
| name the 7 characteristics of living things | 1) movement 2) growth 3) feeding 4) sensitivity 5) respiration 6) reproduction 7) excretion |
| label this diagram of an animal cell | A- cell membrane B- nucleus C- cytoplasm (the little circles are vacuoles btw) |
| what is the definition of the word "cell" | a cell is a basic unit of life |
| what is an organism? | an organism is a group of systems working together. e.g humans,fish,insect,plants |
| name two ways to measure a curve | 1) a curvy metre 2) a piece of string |
| how do you measure diameter/thickness |
1) simple calliper
2) vernier calliper (very accurate)
Image:
simple_calliper (image/jpg)
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| how do you find the area of a regular shape? | length x width |
| how do you measure volume? | length x width x length |
| what kind of energy does a battery have | chemical |
| give an example of potential energy | stretched elastic band |
| what is the law of conservation of energy | energy cannot be created or destroyed only changed from one form to another. |
| what is "renewable" energy? | sources can be used again and again |
| what is "non renewable" energy? | sources are only used one and never again. |
| what is "matter"? | matter is anything that takes up space and has mass. |
| all matter is made up of _______ called ______. (fill in the blanks) | all matter is made up of particles called molecules. |
| what does "difuse" mean? | e.g gas difuses by spreading round the air/room and not staying in the one place. |
| at what temperature does water boil at? | water boils at 100 °C |
| what temperature does water freeze at? | 0 °C |
| the difference between boiling and evaporating? | boiling-the liquid changes to a gas throughout the liquid evaporating-liquid changes to a gas at the surface only |
| what is a solution? | a solution is a mixture of a solute and a solvent |
| what is a solvent? | a liquid in which the substance dissolves. |
| what is a solute ? | the substance placed in the solvent |
| whats an insolubile solid? | a solid that does not dissolve |
| what is a soluble solid? | a solid that does dissolve |
| examples of solutes and solvents | solutes solvents tar petrol paint white spirits p marker highlighter |
| what is a dilute solution? | a dilute solution has lots of solvent and a little solute. |
| what are these called? | tripod and wire gauze |
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