Transcript Are you smarter than a 3rd grader?

Are you smarter than a 3rd
grader?
Science review
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What is another name for a
valuable mineral such as a
diamond or ruby?
gem
coal
topaz
Igneous rock
• gem
What is water that is held in rocks
and soil below ground called?
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groundwater
aqueducts
Fresh water
reservoirs
• groundwater
Which mineral property is identified
by the color of the powder left
behind when it is rubbed across a
surface?
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Hardness
Streak
Color
luster
Streak
What are the impressions that living
things leave behind in the mud
called?
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Casts
Remains
Fossils
imprints
• imprints
Which part of the soil works like a
sponge?
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Bedrock
Humus
Subsoil
Sand
• Humus
• A resource that can be used over and over
is a(n) __________.
• Renewable resource
• Tiny bits of rock or dead plant and animal
matter is called __________ .
• sediment
• A rock that is formed from layers of
sediment is a(n) __________.
• Sedimentary rock
• Harmful things in the air cause
__________.
• pollution
• Melted rock cools and hardens, forming
__________.
• Igneous rock
• Making resources last longer is called
__________.
• conservation
• A material on Earth that is necessary or
useful to people is a(n) __________.
• Natural resource
• Energy from the sun is called
__________.
• Solar energy
• Salt is a type of __________.
• mineral
• A resource that takes millions of years to
form and cannot be easily replaced is a(n)
__________.
• Nonrenewable resource
• Use the following vocabulary terms:
– Igneous rock
– Metamorphic rock
– Sedimentary rock
Classify the following rocks:
granite
sandstone
slate
– Igneous rock = granite
– Metamorphic rock = slate
– Sedimentary rock = sandstone
Three layers of soil:
Topsoil – Subsoil - Bedrock
• Which level of soil is rocky and would be
the most difficult to reach? Why?
• Bedrock is the most rocky layer of soil and
it would be the most difficult layer to reach
because it is the deepest in the ground.
• Why is it important for farmers to prevent
erosion?
• It is important for farmers to prevent
erosion because they need topsoil to grow
plants. If the topsoil is eroded, farmers
won’t have good soil to grow their plants.
• Coal and gas are two of the United States’
main sources of energy. What is one
problem with using these fossil fuels?
• One problem with coal and gas is that they
are nonrenewable resources.
• Another problem with coal and gas is that
they must be burned when used and this
creates pollution.
• Many people are considering alternative
forms of energy. What alternative form of
energy do you think would be best for the
environment? Why?
• Example answers:
– Solar energy would be good for the
environment because the sun is always there,
and it doesn’t create much pollution.
– Energy from wind would be good for the
environment because it is a renewable source
of energy and it doesn’t pollute like burning
fossil fuels.
• Some animals live in soil. How can
animals benefit the soil where they live?
• Example answers:
– Animals can benefit the soil by adding
nutrients. For example, cows leave manure
which gives nutrients to the soil.
– Worms help the soil by creating little tunnels
in the soil that makes room for air.
– Chickens can help the soil by scratching
around. This moves the soil around just like
how farmers move the soil with tools.
• You live in an area with very little water.
There is a water source several miles
away. Describe one way you could move
the water from its source to where it is
needed.
• Possible answer:
– People could build an aqueduct system to
move water from one place to another. They
would build pipes and water could go in those
pipes to the place with very little water.