Forces on Objects
How can magnets push or pull objects?
By using the poles (North and South Ends)
What does friction do to an objects speed?
Slows it down.
What is energy?
The ability to do work or cause a change.
Fill in the blanks....."If it is OPEN it is _______, if it is CLOSED it _______."
Broken
Flow
The energy can ONLY travel if the circuit is complete.
Pick one answer. Investigations must linked to OPINIONS or EVIDENCE?
Evidence
What are the 3 ways to move an object?
Push, Pull, Gravity
True or False. The less force you give on an object, the bigger distance it travels.
False. The greater the force the farther it goes.
What does the acronym M.E.L.T.S.+ C stand for?
M=Mechanical (Movement...wind, water, cars driving)
E=Electrical (something plugged in)
L=Light (Light gives off heat/light)
T=Thermal/Heat (particles move fast)
S=Sound (vibrations)
C=Chemical (eating/battery)
What 4 ways can electrical energy transform?
-Heat (Toaster)
-Light (Lightbulb)
-Sound (Speaker)
-Motion (Fan)
All scientists conduct investigations. In order to be an Experiment, it needs to have at least 2 things. What are those 2 things?
Variable
Control Group
What is a balanced force vs. an unbalanced force?
Balanced=No movement
Unbalanced=Movement (one side is stronger)
Is harder or easier to move heavier objects?
Harder. You must increase the force!
Light ALWAYS travels in a straight line. What happens when it hits a mirror, hits water, and hits a black object?
Mirror=Reflects (Bounce)
Water=Refracts (bends)
Black Object=Absorb )Take in
What are 3 mandatory parts to make a circuit closed and working?
1. Battery
2. Wire
3. Load (light, bell, fan,)
What is a control group and what is it used for?
Control Group is ALWAYS the group you DO NOT CHANGE! Used for comparisons.
How is force measured and what is the tool used?
Measured in Newtons (using a spring scale)
Explain why a book resting on a table is not moving. What are the 2 forces?
Gravity is pulling the book down while at the same time the table is pushing up causing it to be balanced.
What does a high pitch in sound mean?
What does a low pitch in sound mean?
High Pitch=Fast vibrations
Low Pitch=Slowwww vibrations
True or False. Energy can be lost and used up.
False. Just changes form.
What is Repetition? What is Replication?
Repetition=Repeated Trials (used for accuracy in case you make a mistake)
Replication=Copying another scientists methods to get similar results
True or False: Once an object has been moved it has changed position.
True. Sometimes it change direction too!
How do we measure speed? What is the formula?
Speed=Distance /time
What form of energy do you get from friction?
Heat (makes the particles move quickly causing heat)
What is the difference between conductors and insulators? Provide 2 examples of each.
Conductors: Allow energy to pass through
1. Metal Wire
2. Paperclip
Insulators: Do NOT allow energy to pass through
1. Plastic
2. Rubber Band
True or False. Scientists must ALWAYS do the scientific method and always in the same order.
False.