Waves
Radiation
This measures the amount of matter in an object
mass
You see an image of yourself in a mirror because light waves are
reflected
A car is moving at a speed of 50 km/hour. The driver takes her foot off of the accelerator and the car coasts to a stop. Why?
Friction
Sir Isaac Newton determined that gravity has a fixed acceleration on Earth. The earth pulls objects towards it with a fixed acceleration at -9.8 m/s2. This is a _____________ ____________, as it states a scientifically accepted fact about the natural world.
Scientific Law
Electromagnetic waves are classified into forms such as radio waves, microwaves, and infrared waves, based on the amount of energy they carry. Which property of an electromagnetic wave determines the level or amount of energy it carries?
hint:
___________indicates the level or amount of energy the electromagnetic wave is carrying. ________ is the measure of distance between two consecutive crests or troughs. Shorter the ________ means higher frequency. This implies more energy.
Wavelength
) As an astronaut goes out into space (not on another planet but in space), her mass _______________ and her weight ____________________.
hint:
One does not change and the other depends on something else
Remains the same; depends on the gravitational pull
If you put a straw into a glass of water, the straw looks to be bent, although nothing has really happened to the straw. The term that describes this property of light is
Refraction
Brad and Erin decide to have a tug of war contest. Erin pulls the rope with all her might and so does Brad. Sadly, Brad only pulls with half the force that Erin pulls with.
Which way will the rope move?
Towards Erin, since the forces are unbalanced
The speed of sound waves through two different media, steel and air, was recorded. Which medium would sound travel through the best?
hint: Sound waves are compression waves. The closer the particles of the medium are, the faster the sound waves travel.
steel
This is determined by the gravitational pull exerted on an object
weight
Remote controls use invisible light of frequency just below the visible range. This part of the electromagnetic spectrum is called
Infrared
what can we say is true about the affect of net forces of two men both applying 50 N on opposite sides of a cart?
A)It cannot be determined without knowing which man is stronger.
B)The forces are not balanced, because one man is taller than the other.
C)The forces are balanced. But, the forces acting on the cart have increased and the cart’s motion is affected.
D)The forces are balanced. Thus, there is no change in forces acting on the cart and the cart’s motion is not affected.
D. The forces are balanced. Thus, there is no change in forces acting on the cart and the cart’s motion is not affected.
identify which phase of matter would transmit sound waves the fastest, and why?
A)The gas would transmit the fastest because the particles move the fastest.
B)The solid would transmit the fastest because the particles are closest together.
C)The liquid would transmit the fastest because the particles are the most freely moving.
D)The gas would transmit the fastest because there are the fewest particles to interfere with the waves.
B
We measure this in Newtons
Weight
Why is it better to wear a white shirt on a hot summer day instead of a black shirt?
A)A white shirt absorbs all colors of light and would be cooler in the sun.
B)A black shirt absorbs all colors of light and would be cooler in the sun.
C)A white shirt reflects all colors of light and would be cooler in the sun.
D)A black shirt reflects all colors of light and would be cooler in the sun.
C
what can we say is true about the affect of net forces of one man on the left is applying 10 N on one side of the cart and another man on the right is pushing 50 N on the opposite side of a cart?
A)It cannot be determined without knowing which man is stronger.
B)It cannot be determined because one man is taller than the other.
C)The forces are unbalanced, and net force on the cart moves it to the left.
D)The forces are unbalanced, and net force on the cart moves it to the right.
C
Ms. Mayo challenged her students to build a pendulum that would hit a block of wood and move it. The group that moved the block of wood the farthest would win a prize. Ms. Mayo asked her students to present a line graph of their data. What variable should be written on the Y axis?
What are the waves of the electromagnetic spectrum? (extra points for getting them in order)
Radio
Microwave
Infrared
Visible Light
UV
x-ray
Gamma
Little Suzie Q has a mass of 100g. She is studying a new planet called suziequeneptus that has a gravitational pull of 1/67876 that of Earth's. What would her mass be on this planet?
100g
What are the four contact forces?
Friction
Applied
Normal
Air Resistance