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23 Cards in this Set
- Front
- Back
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What is an independent variable?
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The variable that you deliberately change in your investigation to see what effects it has on the dependent varible.
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What is a dependent variable?
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This is the variable we are observing the change in throughout our investigation.
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What is a control variable?
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these are the varibles that you eliminate
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What is a hypothesis?
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This is the theory or idea that is going to be investigated.
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What happens during evaporation?
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A liquid changes to a gas.
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Clouds are formed by
a] rain falling. b] hot air rising c] water vapour condenses |
c] clouds form when water vapour cools and condenses into tiny water droplets
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what is a variable?
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This is anything that measure that can have different numerical measurements.
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How do you create a fair test?
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A fair test that allows only one independent varible to effect the dependent variable.
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What steps should you take to design a Fair Test? name three steps.
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1] State what you want to study and what you think you will find. This is the hyopthesis.
2]Identify the dependent and independent variables. 3]Make sure any extra variables that could have an effect upon the dependent variable are controlled or removed. |
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What are the processes that all living things have in common?
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MRS GREN
Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition |
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Why do we classify animals?
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So that we can understnad the similarities and differences of the millions of different animals on the planet. It is called CLASSIFICATION.
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What is the first big division in classification?
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Kingdoms. There are five.
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In the Kingdom of Animals what is the next classification?
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Vertebrates and invertebrates.
Those with a backbone and those without. |
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On what criteria is the the classification of KINGDOMS based?
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On what the organism's cells are like.
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How are the vertebrates further catagorised?
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reptile
bird fish mammal amiphibians |
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In science, what is a physical change?
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This is when there are changes in the condition of the substance but NOT in the chemical properties.
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True or False
The mass of a substance will remain the same even a fter a physical change. |
TRUE
eg. if you melt 100g of ice you get 100g of water And if you boil 100g of water you will get of 100g steam |
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Name three examples of physical changes?
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changes in colour
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what is evaporation?
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a change of physical state from liquid to gas by heating up.
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what is condensation?
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A change of physical state by cooling down from gas to liquid.
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What is melting?
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A change in a substances state from solid to liquid by heating up
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What is freezing
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A physical change of state from liquid to solid by cooling down.
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True or False
The melting point of ice and the freezing point of water are different. |
FALSE.
water freezes at the sme temperature that ice begins to melt zero degrees centigrade. |
