Metrics & Measurement
Forces
Waves
Energy
100
Which cube is more dense?
The right cube
100
How do I know an object is in motion?
Their position changes as well as the reference frame
100
What is the doppler effect?
If an object producing a sound is moving then it will have a higher pitch moving toward you and a lower pitch moving away from you.
100
How does heat travel based on the temperature of objects?
From hot to cold
200
Convert 5 cm to Dm
.005 Dm
200
What is the net force?
0. They are balanced forces.
200
Compare how the particles in a transverse wave moves to a compressional/longitudinal wave move.
Transverse: particles move up and down
Compressional: particles move left and right
200
What is a magnetic field?
The area a magnet can act upon.
300
Why is it important we have a standard system of measurement?
To accurately measure things and to easily work with scientists around the world.
300
I send my pet ant named Andy to another planet. This planet has a different force of gravity. Did Andy's weight change? Did Andy's mass change? Explain WHY
Yes Andy's weight changed since weight is based on the force of gravity. No, Andy's mass did not change since that is the amount of matter in an object
300
What is A and B in the longitudinal wave?
A - compressions
B - rarefactions
300
Why can't you hear sound in space?
Sound is a mechanical wave and needs a medium (solid, liquid, or gas) to travel through
400
What's the difference between quantitative and qualitative data.
Quantitative - numbers
Qualitative - characteristics, qualities, etc. that are not numbers
400
What are Newton's 3 Laws of Motion? Provide an example with each
1st - An object in motion stays in motion, an object at rest stays at rest, unless acted upon by an unbalanced force.
2nd - F = ma
3rd - For every action there is an equal and opposite reaction
400
What is A, B, C, and D?
A - crest
B - wavelength
C - Amplitude
D - Trough
400
Explain the energy transformation that takes place when you use a hair dryer.
Electrical energy changes to heat energy and sound energy
500
Describe how you would find the volume of a toy car.
1st put water in a graduated cylinder. Take note of the how many mL. 2nd put the toy car in the graduated cylinder. Take note of how many mL. Subtract the final measurement minus the initial measurement.
500
Explain why a piece of paper and a brick would fall at different rates in classroom, but at the same rate in a vacuum.
In a vacuum the force of gravity is the only thing acting on the objects, so they would both fall at 9.8 m/s2. In a classroom there is still air resistance present, so the paper would fall more slowly.
500
Describe how destructive interference works with headphones
The headphones hear a sound and produce a wave that is opposite to that sound so they cancel out. Crests and troughs cancel.
500
Identify and describe the 3 types of heat transfer.
Conduction - direct contact
Convection - warm liquids or gasses rising and cooler liquids or gasses sinking
Radiation - electromagnetic waves