| Material World 1 | Material World 2 | Earth and Space 1 | Earth and Space 2 | Living world |
|---|---|---|---|---|
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What are the five indicators of chemical changes?
- emission of gas
- emission of light - formation of precipitate - change in colour - change in temperature |
What is density?
The amount of matter there is in a certain volume.
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What is a trace fossil?
An imprint left in soil by an organism that lived a long time ago.
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What is a light year?
The distance in kilometers that light travels in one year.
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What is a cell?
The basic unit of all life.
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What is an energy transfer?
The movement of energy from one place to another
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What unit is sued to express density?
g/cm3 or g/ml
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What is absolute dating?
Finding out the exact age of fossils
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What is a supercluster?
A group of clusters of galaxies.
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What does DNA stand for?
Deoxyribonucleic acid
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What is the unit used to express energy?
Joules.
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What is a supersaturated solution?
A solution that contains more than the maximum amount of solute.
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What is the law of superposition?
The deeper the stratigraphic layer, the older it is.
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What is in the Kuiper Belt?
Asteroids and comets
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What is a genome?
The complete set of genes in a person.
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Classify F2 + heat --> F2 as a physical or chemical change
Physical.
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What is a solubility curve?
A graph to determine the mass of solute that will dissolve in 100g of water at different temperatures.
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What are the elements necessary for teh emergence of life?
Carbon, nitrogen, hydrogen and oxygen
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What are the types of galaxies?
Spiral, eliptical and irregular.
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What is a system?
A group of organs that work together to complete a set of tasks.
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What is deformation?
A shape change in matter.
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What is the formula for % mass/ mass concentation?
mass of solute (g) / mass of solution (g) x 100
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Which mass extinction ended the Paleozoic era?
Permian
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How many kilmoeters is 1 light year?
9.46 x 10 ( to the power of 12)
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What are the types of muscle tissue?
Skeletal, smooth, Cardiac
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