Use these ideas as suggestions for additional testing and measurement
apparatus and for techniques that could be employed for constructing suit
parts.
3. Connector Seal Test Place Martian sediment simulant or
other dry sandy sediment in the jar. Place plastic tape over the
zone where the lid comes together with the jar. Shake the jar several
hundred times and then remove the tape to see if any sediment made
its way
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through the jar and lid threads to stick to the tape.
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4. Tethers
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5. Weightlifting Research an exercise routine that can be used
to strengthen the upper body. This is the area of the body that
receives the greatest workout during a spacewalk in Earth orbit.
Design exercises for strengthening the lower torso and for planetary
surface exploration.
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8. Visor Light Transmission Tester Connect a solar cell to a
potentiometer and a millammeter. These items are available from
an electronic parts store. Adjust the potentiometer so a light source
you are measuring does not drive the needle off the scale. Place
potential space helmet visor material between the light source and
the solar cell to evaluate the material's light-filtering properties.
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7. Measurements for Space Helmet
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8. Paper Maché Space Helmet Inflate a large round balloon
to a diameter greater than student heads. Cover the balloon with
four layers of paper maché. Paper maché can be made
with newspaper strips and a 50/50 solution of white glue and water
or with premixed wallpaper paste. Let each layer dry before applying
the next one. When completely dry, deflate and remove the balloon
and cut appropriate holes with a scissors. Paint as desired.
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9. Vacuum Experiment - 1 Obtain an electric doorbell, push button,
and doorbell transformer. Insert the wires to the doorbell through
a single-hole rubber stopper. The stopper should fit the upper hole
in the bell jar. Fill the rest of the stopper hole with hot glue
from a hot-glue gun to seal the wires in place. Evacuate the bell
jar and ring the doorbell. While holding the button, gradually let
air back into the jar. The bell cannot be heard ringing when the
jar is evacuated even though the clapper can be seen to be moving.
This demonstration explains why spacesuits have two-way radios.
Sound is not conducted through a vacuum.
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10. Vacuum Experiment - 2 Construct a marshmallow astronaut
out of regular size and mini marshmallows and toothpicks. Evacuate
the bell jar and observe how the marshmallows expand. Living tissue
will also inflate in a vacuum because of gas bubbles forming in
the fluids of cells.Note: The vacuum pump, vacuum plate, and bell
jar needed for the activities on this page are common pieces of
science equipment found in many junior and senior high schools.
This equipment is available from school science supply catalogs
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11. Vacuum Experiment - 3 Show how fluids like water boil when
they are exposed to a vacuum. Place water in a beaker and evacuate
the bell jar. The demonstration will take place more rapidly if
warm water is used. Place a thermometer in the beaker to record
the boiling temperature.
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12. Torque Place a student on a swivel office chair or on a
rotating platform like a child's Sit and Spin®. Have two other
students hold a 2 by 4, with a bolt partially screwed into it, over
the first student. The first student will find it difficult to turn
the bolt with a wrench without spinning as well. Relate this to
the challenges astronauts have on spacewalks when they try to do
a similar job. To turn a bolt or move some massive object in space,
an astronaut is attached to a stable work platform.
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13. Underwater Training If a swimming pool is available, practice
underwater EVA training. Have students wear a dive mask and assemble
PVC water pipe parts underwater. Make a weighted panel that has
bolts protruding from it. Use a chrome steel wrench to try to turn
the bolts while free floating in the water. Make tools appear weightless
by attaching a string to the handles and to empty two liter soft
drink bottles. Invite a local SCUBA shop to participate in the activity.
The shop owners might be willing to supply dive equipment and serve
as safety divers during the simulation.
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14. Neutral Buoyancy Astronauts simulate microgravity for spacesuit
training in a deep swimming pool. Their spacesuits are specially
weighted to produce neutral buoyancy. You can investigate neutral
buoyancy by creating a small submarine out of a plastic film canister,
aquarium tubing, pennies, and hot glue. Punch tow holes at the base
of the canister and a hole in the lid. Hot glue the end of the aquarium
tube into the hole in the lid. Add several pennies to the canister
so that when you place it in a water-filled aquarium, the canister
just floats. Suck air out of the tube to cause the canister to sink.
Try to get the canister to hover half way from the bottom to the
surface
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15. Neutral Buoyancy - 2 Neutral buoyancy can also be investigated
with a Cartesian diver. Fill a plastic soft drink bottle with water.
Insert an eyedropper that is partially filled with water. Cap the
bottle and squeeze the bottle's sides to increase the pressure in
the bottle. The trapped air in the eyedropper will compress and
the eye dropper will sink. Try to get the eyedropper to hover midway
in the bottle.
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16. Design A Tool Have students design and construct a prototype
multipurpose tool for use on spacewalks. The tool should combine
the functions of single purpose tools such as hammers, screw drivers,
wrenches, etc. The tool should also make provisions for attatchment
to tethers and easy gripping
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17. Glove Work Use rubber-coated work gloves from a hardware
store to demonstrate the importance of spacesuit gloves that are
comfortable to wear. Have students attempt to screw a bolt into
a nut or assemble plastic snap toys into a structure. Discuss how
these gloves can be improved to make them easier to use.
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