Air & Aerodynamics
What is a property of air:
a) it takes up space
b) it can be compressed
c) it has mass
d) all of the above
d) all of the above
What is one design change that can improve the effectiveness of a model parachute?
a) bigger surface area of canopy
b) hole in canopy
c) both a and b
c) both a and b
What emits light in our Solar System? (2 things)
What unique characteristics at a scene can allow an investigator to make inferences about the participants and the nature of the activity?
fingerprints tire tracks
footprints animal tracks
handwriting
fabric
Why are trees and forests valued?
serve as habitat for various living things
provide raw materials
jobs
recreation
oxygen
Bernoulli's principle:
Lower pressure/high speed
Higher pressure/low speed
True or False
True
How does a hot air balloon work?
a) hot air expands and is less dense
b) hot air expands and is more dense
a) hot air expands and is less dense
Earth ____ on its axis and ____ around the sun.
a) rotates, revolves
b) rotates, spins
c) revolves, rotates
a) rotates, revolves
Handwriting should be studied to notice:
a) the pen that they used
b) the slant and shape of the letters
c) how tired they were when they were writing
b) the slant and shape of the letters
Describe the role of trees in nutrient cycles.
a) absorb oxygen and release oxygen
b) photosynthesis (absorb carbon dioxide and release oxygen)
c) food for squirrels
b) photosynthesis (absorb carbon dioxide and release oxygen)
What are opposite forces of light?
a) lift and gravity
b) thrust and lift
c) drag and gravity
a) lift and gravity
Ailerons do what:
a) control roll (bank) when one moves up and one moves down
b) control roll (bank) when they both move up
c) control pitch (nose going up and down)
a) control roll (bank) when one moves up and one moves down
Name the 8 phases of the moon. Double points if you sing.
New moon, Waxing crescent, First quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, Waning Crescent.
When we were testing markers for ink, the controlled variable was the:
a) amount of water
b) type of marker
c) coffee filter
d) a and c
d) a and c
Identify characteristics that distinguish deciduous trees from coniferous trees.
leaves seeds flowers shed leaves
cones seeds don't shed
Identify one adaptation that enables birds or insects to fly.
a) hollow bones
b) streamlined feathers
c) tail feathers for control
d) all of the above
d) all of the above
Elevators control ______ and rudders control ____
a) yaw, pitch
b) roll, pitch
c) pitch, yaw
c) pitch, yaw
Spring and Fall have Equinoxes (equal hours of day and night)
Summer and Winter have Solstices (long and short days and nights)
True or False
True
The first day of Summer is the longest day of year
The first day of Winter is the shortest day of the year
Name three types of fingerprints.
Arch, whorl, loop
Transpiration:
a) water evaporates through leaves like sweating
b) water evaporates from the ground
c) releases energy
a) water evaporates through leaves like sweating
What gas is needed to burn fuel?
a) carbon dioxide
b) helium
c) oxygen
c) oxygen
Bird wings are shaped like plane wings in that they both have
a) ailerons
b) feathers
c) airfoils
c) airfoils
Each turn of the earth, if it makes 4 turns, takes:
a) 5 hours
b) 8 hours
c) 6 hours
c) 6 hours if there are 4 turns because 4 times 6 = 24 hours for one whole turn
When we were testing markers for ink, the manipulated variable was the:
a) amount of water
b) type of marker
c) coffee filter
b) type of marker
What human actions can enhance or threaten the existence of forests?
reforestation efforts (don't cut down too many and plant new ones)
deforestation and habitat destruction (cutting down too many)