Download F__ Chemical Energy D

Name____________________________________ Date____________________________ Class# _______________
Unit 8 – Energy Review Sheet
Match the term to the correct choice below.
__E_ Electrical Energy
A
Energy that radiates in waves and travels in
straight lines called rays.
__D_ Potential Energy
B
Energy that is produced from vibrations
__A__ Light Energy
C
Energy of heat
__F__ Chemical Energy
D
Stored energy or energy due to an object’s
position.
__B__ Sound Energy
E
Energy resulting from the movement of
electrons.
__C__ Thermal Energy
F
Energy from the rearrangement of
electrons to form a new substance.
__G__ Mechanical
Energy
G
Energy of movement – often involves
simple machines
The picture below shows several light rays striking a diamond. Describe how the light is reacting with the
surfaces of the diamond at each point (reflected, refracted, absorbed, or transmitted).
At point ❶ light is being ___Reflected__________
❷
❸
At point ❷ light is being ____Refracted_________
❹
At point ❸ light is being _____Absorbed________
❶
At point ❹ light is being ____Transmitted_______
Name____________________________________ Date____________________________ Class# _______________
Unit 8 – Energy Review Sheet
Does this rock have potential or kinetic energy?
Potential Energy – Specifically Gravitational potential energy
due to its position – in other words, it could fall!
Which forms of energy are present when a radio is playing music?
Mainly Electrical and Sound Energy --- It may also heat over time, so thermal energy could be present. If there are lights
On the radio then light energy is present, and if it is run from batteries, chemical
energy is also present.
When you eat a sandwich, your body breaks down the sandwich to provide energy for your body. What form
of energy is the sandwich, and what type of energy does your body convert it to?
Sandwich = chemical energy
It is converted to mechanical and thermal energy – gives your body energy to move and keeps you warm!
Negatively charged particles in an atom are ___Electrons______.
A ______Medium____________ is the substance energy is passing through.
An object that allows light to pass through it is _______Transparent___________.
An object that blocks all light is _________Opaque_____________.
An object that scatters light as it passes through and is difficult to see through is ______Translucent________.
Name____________________________________ Date____________________________ Class# _______________
Unit 8 – Energy Review Sheet
Use the pictures of electrical circuits below to answer the following questions:
++- +❶
❶
Image A -
Image B -
Which image illustrates a series circuit? Which image illustrates a parallel circuit?
Image A is a series circuit and Image B is a parallel circuit
What will happen in each circuit if you add an open switch at point ❶ in each diagram?
In image A all the light bulbs will go out because it breaks the whole circuit.
In image B only the light bulb next to the switch will go out because it only breaks one pathway.
Which circuit is the most efficient – in other words which one provides equal amounts of energy to each
bulb? The Parallel circuit is most efficient because it evenly distributes the energy to all bulbs.
1. Students can demonstrate reflection by doing which of the following?
A Enlarging an image using a hand lens -- Refraction
B Measuring a shadow made by the Sun -- Result of an opaque object
C Warming metal under a heat lamp – This is not related to light at all!!
D Observing their own image in a calm lake -- Correct answer – the lake reflects the image
2. In very sunny areas, many buildings are painted to reflect sunlight so they will not absorb
more heat than necessary. Which paint would you expect to see on the buildings?
A Black paint -- Absorbs all colors
B Blue paint -- Absorbs all but blue light
Name____________________________________ Date____________________________ Class# _______________
Unit 8 – Energy Review Sheet
C Green paint -- Absorbs all but green light
D White paint - Correct – reflects all colors!
3. All of the following are examples of mechanical energy except:
A Riding a bike
B Raising a flag
C Winding up a car
D Listening to music – Correct – all others involve movement! This is sound energy
4. An advertisement states that a new model washing machine is very energy efficient.
Compared to other washing machines, this new model is MOST LIKELY to –
A Cost less to buy
B Use less electricity -- Correct – efficient means to use less without wasting
C Take up less space
D Use less detergent
5. In which situation does light bend? Light bending = refraction!
A. When light moves through air into water -- Correct – water refracts light
B. When light hits a wall – This would be some reflection (wall color) and absorption
C. When light passes through outer space – This would be transmission
D. When light hits a mirror – This would be reflection
6. Which statement below describes what will happen in the
picture to the right?
A. The circuit will light up but the second bulb will be dimmer.
B. The circuit will not light up due to the wires connecting
to the same side of the battery. Correct Answer
C. The circuit will not light up because the bulbs are
not connected properly.
D. The circuit will light up and both bulbs will be lit equally.
This circuit won’t work
because the second
wire should be
connected here!