Island survival Flashcards
What kind of heat transfer occurs in fluids where particles are free to move?
Convection
Explain where plants get their mass from.
The carbon and water they get in the air - through photosynthesis.
Define mixture
A combination of two or more substances that are not chemically combined
What is used to test for starch?
Iodine solution. If starch is present, it will turn from orange to blue/black.
Produces solid crystal form a solution
Crystallisation
What does putting a coat on a snowman do and why?
Slows down the speed at which it melts. The coat is a thermal insulator which reduces thermal energy transferring from the warmer air into the snowman.
Why do cricketers wear white clothing on a sunny day?
To keep them cooler at the white clothing absorbs less raadiation from the sun compared to darker clothing.
What is the name given to liquid that is collected after passing through filter paper?
Flitrate
What is the name for a solution with the maximum amount of solute dissolved inside?
Saturated solution
What kind of surface is most likely to absorb radiation?
Dark and matt. In opposition to this, a surface that is likely to reflect radiation is something shiny, like a mirror.
What process involves heating water up, condensing the vapour back into liquid to seperate the solution?
Distillation
What technique could be used to abtain clean drinking warter from a salt water solution?
Distillation
A substance that has dissolved in a solvent
Solute
Technique that seperates insoluble solds from a mixture
Filtration
Heat transferred due to particle to particle collisions?
Convection
When you are studying a system, what is meant by the surroundings?
Everything that surrounds the system and could potentially interact with the system.
A mixture not uniform in composition
Heterogeneous mixture
A mixture uniform in composition
Homogenous mixture
Air is a mixture of gases; sea water is a mixture of water and salt. Are these examples of homogenous or heterogenous mixtures?
Homogenous
What is the name given to the material left behind in the filter paper after filtration?
Residue
Heat energy transfers due to waves by what method?
Radiation
What reactants are needed for photosynthesis?
Light energy converts carbon dioxide and water (the reactants) into glucose and oxygen (the products).
Photosynthesis is the function of…
Plants converting light energy from the sun into chemical energy for food.
Word equation for photosynthesis
Carbon dioxide + water -> glucose + oxygen
