Air & Aerodynamics
Explain what happens to air speed and air pressure in Bernoulli's Principle.
When air moves faster, the air pressure decreases.
What principle of air helps Hot Balloons to fly?
Hot air rises, because it is less dense. Therefore the burner in a hot air balloon helps it to rise and fly because it is less dense than the surrounding cold air.
Name the planets in order from closest to the sun to farthest.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
What does Biotic and Abiotic Mean?
Biotic: Living Things
Remember : Bio = living (like biology)
Abiotic: Non-living things.
What is the difference between an inference and an observation?
Inference: a guess based on observations
Observation: something you can physically see, touch, hear, etc.
What are the four forces of flight?
Lift, Gravity(weight), Thrust, Drag
Give an example of a glider, and explain how can that glider create thrust?
- if it is a paper airplane, someone creates thrust from throwing it
- if it is a glider, it can be jumped off from a high area, or dropped from a plane.
What is one object that emits light, and one that reflects light?
Emits: stars, meteroids
Reflects: moons, planets
What are the three types of organisms?
Producers: produce their own food
Consumers: living things that eat living things
Decomposers: living things that feed of dead things
What are the four fingerprint patterns?
Loops, Arches, Whorls, Composite
What is Oxidation?
The combination of substances with oxygen this causes the brown colour on an apple, or rusting
What is a difference between an aircraft and a spacecraft?
- aircrafts use engines, where a spacecraft also requires rocket boosters
- aircrafts are streamlined to decrease drag, spacecrafts don't need to be streamlined
What is the difference between a comet, asteroid, and meteoroids.
Comets: made of ice and dust that move in elipses around the sun
Asteroids: rocky objects that travel in a belt
Meteoroids: Shooting stars causes by hard material being burned in Earth's atmosphere
What are the steps of the nutrient cycle(3)?
1. A producer pulls nutrients and water from the soil to grow leaves and fruit.
2. A consumer eats the producer and the nutrients move into their body.
3. A consumer or producer dies, and those nutrients are returned to the soil
What can investigators learn from tracks?
The direction of travel, the speed of travel, and the mass (weight) of the person or truck
What is one adaptation a bird or insect has, and how does it help them to fly?
- Bird: feathers make them streamlined, flight muscles make them strong and create thrust, hollow bones make them light.
- Insects: flap in a figure eight to create thrust, cold-blooded only fly in the warmth
What helps a helicopter to create lift and how?
It creates lift with a horizontal propeller that has blades that create an airfoil.
Define circumpolar, and give an example of a circumpolar constellation.
Circumpolar means these stars are near the north or south polar, and can appear to rotate as the Earth rotates.
Examples: Big Dipper, Little dipper.
What would you expect to see on a tree cookie where there had been a dry summer, and a fire in its past?
The fire: would leave a visible burned mark if it was recent, or a black mark on the tree the rings grow around.
What can investigators find out from a fabric sample?
They can find whether the suspect was wearing natural or synthetic fibers.
What are the 6 Properties of Air?
1. Takes up space
2. Has Mass
3. Is Invisible
4. Exerts Pressure and can be Compressed
5. Has density
6. Air is a fluid and can flow
What principle of air helps Hot Balloons to fly?
Hot air rises, because it is less dense. Therefore the burner in a hot air balloon helps it to rise and fly because it is less dense than the surrounding cold air.
What is the difference between a solar eclipse and a lunar eclipse?
Solar: moons blocks the sun from Earth
Lunar: Earth blocks the sun from the moon
What two things can be done to help support Forest growth?
Reforestation: replanting
Selective Cutting: selectively choosing trees for logging
What is done during a Chromatography experiment?
In this experiment, investigators use water, pens, and a coffee filter. In this experiment, Investigators mark the coffee filter or paper with a pen and hold it just above the water. The way the water spreads the ink can tell investigators what pens are used.