What is Gathering knowledge about the natural world
100
2. What is matter?
What is The “stuff” everything is made of
100
5. What is energy?_
What is __the ability to do work________________________________________________
100
17. What is the formula for work:
What is force X distance (measured in Newton meters or Joules)
100
24. Waves transfer
What is energy__________________________
200
32. How can you increase the magnetism in an electromagnet?
What is Increase the size of the iron core, the amount of wire wrapped around the iron core, or the power source size/voltage
200
9. What are some signs a chemical change occurred?
What is Change in color, odor, production of light, sound, fizzing/foaming, burning
200
16. Work is done when what two things happen?
What is The object must move and must move in the direction the force is applied
200
19. Why can work output never be greater than work input?
What is Because some of the work input is always going to be used to overcome friction
200
8. Physical properties (list them) vs
Chemical properties (list them)
What is Physical: Not limited to: Density, malleability, ductility, boiling point, solubility, color, texture Chemical: reactivity, flammability/combustability
300
7. What is density? When you pour liquids of different densities into a jar, what do they do and why?
What is The amount of matter in a given space. They separate into different layers because the most dense goes to the bottom and the least dense floats on the top.
300
10. Draw the particles in the three states of matter and list the characteristics of each:
Solid: attraction: strong, energy: low
Liquid: attraction: medium; energy: medium
Gas: attraction: barely there; energy: high
300
15. What is a net force? What is a balanced force? Draw one! What is an unbalanced force? Draw one!
What is Net force: total force Balanced force means a net force of zero , therefore there is no change in motion
Unbalanced force: any net force that is greater than 0
300
13.
Ways to increase friction Ways to decrease friction
What is
Ways to increase friction
Increase force
Increase surface roughness
Decrease lubricant
Ways to decrease friction
Decrease force
Decrease surface roughness
Add a lubricant
300
13. Helpful friction Harmful friction
What is
Helpful:
Tires gripping the road
Tread on our shoes
Harmful:
Parts/things wearing out from friction (motors, clothing, etc)
Scrapes from falling on a rough surface
400
14. Define and include the formulas for:
What is Speed: distance/time (measured in meters per second or m/s)
Velocity: distance/time (include the direction of travel) (measured in meters per second or m/s)
Acceleration: change in velocity/time it takes to change velocity (measured in meters per second per second or m/s/s or m/s2)
400
25. Mechanical Waves vs Electromagnetic Waves: write what you know
What is Mechanical waves: require a medium/matter to travel; ex: sound waves
Electromagnetic waves: do not require a medium/matter to travel (can travel through a vacuum!) light waves
400
27. Draw a wave getting louder and higher pitched. Explain what is happening as far as frequency and amplitude and how they are related to volume and pitch.
What is As frequency increases the pitch gets higher. As amplitude increases the wave gets louder.
400
33. What is mechanical advantage and mechanical efficiency? What are the formulas for each?
What is Mechanical advantage: the number of times a machine multiplies your force. MA=output force/input force
Mechanical efficiency: a comparison of how much work put in actually comes back out as work. Expressed as a percentage. ME= work output/work input X 100
400
23.
Conductors Insulators
What is
Conductors
Items that readily allow heat/electricity to pass through them
Insulators
Items that resist the passage/transfer of heat/electricity through them
Wood, plastic, fabric
Metals, especially copper
500
22.
What is Conduction: transfer of heat between objects that are in direct contact
Ex: your seat is warm when you sit down because someone was sitting there before!
Convection: transfer of heat using gas or liquid
Ex: heating of a house (hot air is pumped through vents)
Radiation: transfer of heat through electromagnetic waves
Ex: the sun heating the earth
500
20. Explain the force distance trade off.
What is If one variable increases, the other decreases (inverse relationship). Example: using a jack to lift a car. You exert a small force over a great distance and the other end of the jack exerts a large force over a small distance.
500
6.
What to measure Tool used Unit of measurement
What is
What to measure Tool used Unit of measurement
Volume of a liquid Graduated cylinder mL
Volume of an irregular shaped solid Graduated cylinder (the displacement method) mL (=cm3)
Volume of a regular shaped solid Meter stick LxWxH
Cm3
Mass Balance (triple beam or pan) Grams
Weight Spring scale newtons
500
11.
Elements Compounds Mixtures
What is
Elements
Atoms
No
n/a
n/a
Compounds
Molecules
Yes
Chemically
No because they have gone through a chemical change
Mixtures
anything
yes
Physically
Yes because they have only gone through a physical change
500
31. Draw the electromagnetic we made in class. Explain how to make it and how it works.
What is Wire wrapped around an iron core (a nail) is then attached to a battery/power source. The flow of electricity through the wire around the iron core creates a magnetic field.