Science Test Knowledge Flashcards
Describe the importance of water as a solvent in daily life, industries and the environment
Daily life - We use water to make drinks such as tea. I.E to make tea you must put the teabag and/or sugar in the hot water for it to dissolve
describe aqueous mixtures in terms of solute, solvent, and solution
Water-solvent
Orange juice-solution
Solute-sugar
Separate the components of some standard mixtures to the physical principles involved in each process for filtration
Use a spoon with holes at the bottom and put the mixture in it. The solid will stay in the spoon while the liquid will pass through
Separate the components of some standard mixtures to the physical principles involved in each process for decantation
Carefully pouring the liquid from the sediment into a different container to hold
Separate the components of some standard mixtures to the physical principles involved in each process for evaporation
If the subject is solid in a liquid (e.x, salt in water) you can just put the mixture in the sun in which the water evaporates and is left with salt
Separate the components of some standard mixtures to the physical principles involved in each process for crystallization
Heat the mixture (which takes most of the sediment away) and let it cool. This allows the rest of the sediment to crystallize.
Separate the components of some standard mixtures to the physical principles involved in each process for chromatography.
Separates molecules and atoms in a mixture.
Separate the components of some standard mixtures to the physical principles involved in each process for Distillation.
You burn the mixture which causes more fast-paced evaporation to happen. The same result as evaporating
investigate the application of a physical separation technique used in everyday situations or industrial processes, eg water filtering, sorting waste materials, extracting pigments or oils from plants, separating blood products, or cleaning up oil spills
A centrifuge is a useful scientific tool for separating blood molecules.
research how people in different occupations use understanding and skills from across the disciplines of Science in carrying out separation techniques
Doctors use the centrifuge for blood transaction
Workers of water filtration use chloroform to separate and kill bacteria from the water.
describe the behavior of matter in terms of particles that are continuously moving and interacting
The particles are usually heated up if they are doing this.
relate an increase or decrease in the amount of heat energy possessed by particles to changes in particle movement
Increasing the amount of heat energy makes the particles move faster and more freely.
use a simple particle model to predict the effect of adding or removing heat on different states of matter
Solid - particles are so close together that they can’t move at all or have very little
Liquid -Particles are not as close together and can move more freely
Gas - Hardly together move very freely
Plasma- Basically gas but faster and more freely
relate changes in the physical properties of matter to heat energy and particle movement that occur during observations of evaporation, condensation, boiling, melting, and freezing
Evaporating -
In the 1st stage -rigid has a set shape
The second -is not rigid. can be compressed. No defined shape
describe interactions between organisms in food chains and food webs, including producers, consumers, and decomposers
Producers make their own food
Consumers-Eat to gain energy and survive
a decomposer-An organism that breaks down dead organic material.
