Transcript StG Revision KU

Revision
Knowledge and Understanding
Information About Test
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Knowledge & Understanding paper
Problem Solving paper
45mins time allocation for each paper
Reproduction
Sampling Techniques
Energy
Reproduction – Sex Cells
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Name the 2 specialised sex cells produced by
humans?
Describe the main features of a sperm cell
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Where are sperm cells produced?
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Describe the main features of an egg cell
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Where are egg cells produced?
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Reproduction – Sex Cells
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Name the 2 specialised sex cells produced by
humans?
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Sperm and eggs
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Head, nucleus, tail
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Testes
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Nucleus, cytoplasm, cell membrane
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Ovaries
Describe the main features of a sperm cell
Where are sperm cells produced?
Describe the main features of an egg cell
Where are egg cells produced?
Reproduction – Fertilisation
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What is fertilisation?
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Where does fertilisation take place?
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Where does a fertilised egg attach to?
Reproduction – Fertilisation
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What is fertilisation?
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Where does fertilisation take place?
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Fusion of the egg and sperm nucleus
Oviduct
Where does a fertilised egg attach to?
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Uterus Wall
Reproduction – Developing
Embryo
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Describe the function of the amniotic
sac
Describe the function of the placenta
Reproduction – Developing
Embryo
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Describe the function of the amniotic
sac
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Protects the growing foetus
Describe the function of the placenta
 food and oxygen from the mother can
pass into the baby and carbon dioxide
and waste can leave the baby
Can you draw a sperm cell and an
egg cell?
Label drawings
Sperm cell
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Male sex cell
Egg cell
Sampling Techniques
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What is an ecosystem?
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Examples of ecosystems are:
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What is a habitat?
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Examples of habitats are:
Sampling Techniques
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What is an ecosystem?
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Examples of ecosystems are:
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Jungle, woodland, desert, rivers, lochs, moorland,
garden, mountains
What is a habitat?
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A biological unit made up of living organisms and
their non-living surroundings
The place where organisms live
Examples of habitats are:
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Pond water, mud, nest, burrow in the soil
Sampling Techniques - Activity
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Quadrat:
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Describe how to sample organisms using a
quadrant
Pitfall Trap:
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Describe how to sample organisms using a
pitfall trap
Sampling Techniques
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Quadrant
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About quadrats:
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quadrats should be placed randomly so that a representative sample
is taken
you should look at the results from several quadrats in an area to
reduce the effect of an unusual distribution
the results are more reliable when you look at the results from
many quadrats
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Sampling Techniques
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Pitfall Traps
The top of the yoghurt carton should be level with the soil
surface
Cover the trap with a stone or piece of wood to keep out the
rain, to make it dark and to stop birds eating your catch
The traps must be checked often to avoid the animals escaping
or being eaten before they are counted
As with most methods a large number of traps makes results
more reliable and minimises the effects of unusual results
Energy
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Can you name the 8 forms of energy?
Renewable & Non-Renewable
Energy
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What is meant by Renewable Energy?
Can you give examples of Renewable Energy?
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What is meant by Non-Renewable Energy?
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Can you give examples of Non-Renewable
Energy?
http://www.childrensuniversity.manchester.ac.uk/interactives/
science/energy/renewable/
Renewable & Non-Renewable
Energy
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What is meant by Renewable Energy?
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Can you give examples of Renewable Energy?
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Sun, Wind, Waves
What is meant by Non-Renewable Energy?
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Energy that can be used again and again and won’t
run out
You cannot make any more of them
Can you give examples of Non-Renewable
Energy?
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Fossil Fuels
http://www.childrensuniversity.manchester.ac.uk/interactives/
science/energy/renewable/
Fossil Fuels
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Name the fossil fuels
Fossil Fuels
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Name the fossil fuels
Crude Oil
 Coal
 Natural Gas
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Reproduction – Sex Cells
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Name the 2 specialised sex cells produced by
humans?
Describe the main features of a sperm cell
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Where are sperm cells produced?
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Describe the main features of an egg cell
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Where are egg cells produced?
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Sampling Techniques
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Quadrat
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About quadrats:
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quadrats should be placed randomly so that a representative sample
is taken
you should look at the results from several quadrats in an area to
reduce the effect of an unusual distribution
the results are more reliable when you look at the results from
many quadrats
.
Sampling Techniques
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Pitfall Traps
The top of the yoghurt carton should be level with the soil
surface
Cover the trap with a stone or piece of wood to keep out the
rain, to make it dark and to stop birds eating your catch
The traps must be checked often to avoid the animals escaping
or being eaten before they are counted
As with most methods a large number of traps makes results
more reliable and minimises the effects of unusual results
Energy
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Can you name the 8 forms of energy?
Energy Changes
Energy cannot be created
or destroyed but can be
changed from one form to
another.
Energy Changes
•A
light bulb
converts electrical
energy to light and
heat energy.
Television: Electrical
to light, heat and sound.
Rock Cycle
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What are the 3 types of rock?
Igneous
Sedimentary
Metamorphic
Rock Cycle Activity
Rocks which have formed from molten
(liquid) material which then cooled down
are called_______.
 Rocks which have been worn down into
small particles like sand and were then
pressed together into new rocks are
called______.
 When heat and pressure are applied to
sedimentary rocks this forms ________
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Rock Summary
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Rocks which have formed from molten (liquid) material
which then cooled down are called IGNEOUS
ROCKS.
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Rocks which have been worn down into small particles
like sand and were then pressed together into new
rocks are called SEDIMENTARY ROCKS.
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When heat and pressure are applied to sedimentary
rocks this forms METAMORPHIC ROCKS.
Activity
ROCK
TYPE
Igneous
EXAMPLE
FEATURES
PROPERTIES
Hard rocks,
very difficult to
scratch
Have Layers
and may have
Fossils
Marble, Slate
ROCK TYPE
EXAMPLE
Igneous
Sedimentary
FEATURES
PROPERTIES
Granite, Basalt
Have Crystals
Hard rocks,
very difficult to
scratch
Sandstone,
Limestone
Have Layers
and may have
Fossils
Easily
scratched,
crumble when
rubbed
together
Metamorphic Marble, Slate
May have
Hard rocks but
crystals and
can be
layers but have
scratched
no fossils
Heat
1.
2.
3.
4.
What is the unit of temperature?
What is the unit of heat?
What temperature does water
boil?
What temperature does water
freeze?
Heat Flow
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What direction does the heat flow?
Heat Flow
Heat moves from _____ to _____
objects . When an object loses _____
energy its ________decreases. If an
object gains heat energy its temperature
_______.
Heat gain or loss can be measured using a
________.
Increases Heat Temperature
Hot Thermometer Cold
Heat
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Radiation
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Hot objects radiate (give out) heat to their
colder surroundings.
Heat
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Conduction
 heat
is passed by the vibration of the
particle, causing their neighbours to
vibrate.
 All metals are good conductors
of heat.
 Plastic is not a good
conductor of heat.
Heat
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Convection
When you heat a liquids or gas, the hot fluid
rises above colder fluids.
This means that the heat energy rises and
travels to another place.
The flow of fluid is called a convection
current.
BIG HEAT TRANSFER QUIZ
Q: Heat is a form of..
.
Q: Heat will travel
along this rod by...
Q: Heat can travel through
space by the process of ...
Q: You can reduce heat loss from
your house through the windows
by getting.....
Q: A material which does not
conduct heat is called an...
Q: There are no particles in
space, it is a...
Q: Which colour of t shirt
would absorb heat best?
Q: When particles are heated
they...
Q: Heat can travel through metals
by conduction so they are called....
Q: When particles in a metal are
heated they start to
more
Q: Heat can only travel by
convection in a
or
Q: Which colour of teapot would
keep your tea hotter for longer?
Habitat and Ecosystem
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What is an ecosystem?
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Examples of ecosystems are:
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What is a habitat?
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Examples of habitats are:
Habitat and Ecosystem
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What is an ecosystem?
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Examples of ecosystems are:
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Jungle, woodland, desert, rivers, lochs, moorland,
garden, mountains
What is a habitat?
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A biological unit made up of living organisms and
their non-living surroundings
The place where organisms live
Examples of habitats are:
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Pond water, mud, nest, burrow in the soil
Task
For 3 ecosystems write down
- what it’s like
- what lives there
- the relationship between the animals and plants
that live there.
Components of an Ecosystem
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An Ecosystem
(made up of living and nonliving parts –
nonliving = the surroundings)
A Habitat
(where organisms live)
A Population
(all the animals of one species)
A Community
(all animals and plants in together in a
habitat)