Science 14 Unit B Review

Unit B Review

Science 14 ​

I can...

​... describe how natural and technological cooling and heating systems are based upon the transfer of thermal energy (heat) from hot to cold objects

• observe and explain the functioning of cooling systems as applications that are based on the principle that heat is transferred from hot to cold objects (e.g., fins on engines, piping on the back of refrigerators and air conditioners, automobile radiators)

• describe the three ways; i.e., radiation, conduction and convection, that thermal energy is transferred from hot to cold objects

Ms. A

I can...

​... describe how natural and technological cooling and heating systems are based upon the transfer of thermal energy (heat) from hot to cold objects

• describe the particle model of matter in which every object consists of particles in motion, and describe the effect of temperature on this motion (e.g., observe Brownian motion)

• describe the role of convection and conduction in distributing heat in natural and technological systems (e.g., sea and land breezes, convection ovens, metal pipes, cast-iron pots and pans) • explain how large bodies of water, such as oceans and lakes, have a moderating influence on climate (e.g., compare the climates of Vancouver and Calgary)

Ms. A

Multiple Choice

What is the energy of motion called?

• potential

• nuclear

• mechanical

• kinetic

Multiple Choice

In which direction does heat flow?

• cold to hot

• hot to cold

• up

• north to south

Multiple Choice

What is temperature?

• average kinetic energy

• average potential energy

• electromagnetic energy

• total kinetic energy

Multiple Choice

What is heat?

• total kinetic energy

• average kinetic energy

• total potential energy

• average potential energy

Multiple Choice

Walking on warm sand with your bare feet demonstrate what type of heat transfer?

• conductor

• convection

• radiation

• thermal

I can...

​... explain the functioning of common methods and devices designed to control the transfer of thermal energy

• explain the functioning of technologies that reduce thermal energy transfer (e.g., clothing, construction strategies for reducing heat loss—insulation, cavity walls, aluminum foil and double glazing)

• describe the functioning of devices and methods that protect against potentially dangerous thermal energy transfer (e.g., household appliances, protective clothing worn by firefighters, internal combustion engine)

• describe the variation in absorption/loss of heat (specific heat capacity) of a substance being heated or cooled, by manipulating variables that include the amount and type of material (e.g., motor oil, cooking oil, water)

Ms. A

Multiple Choice

Why is it better to have a cooking pot with a plastic handle instead of a metal handle?

• Plastic looks better than metal.

• Plastic is not a good conductor of heat

• Plastic washes easier than metal.

• Plastic is a good conductor of heat

Multiple Choice

Check on the location of the following cities on the map. Which place has a moderate climate because it is WARMED BY HEAT TRANSFER FROM A WARM OCEAN CURRENT?

• Regina (a)

• Winnipeg (b)

• Charlottetown (c)

• Quebec (d)

Multiple Choice

In which way do sea breeze blow?

• away from land

• toward the sea

• toward land

• there is no sea breeze

Multiple Choice

Two objects are the same size but have different heat capacities. Object A has a heat capacity of 4.00 J/g•°C and object B has a heat capacity of 2.00 J/g•°C. If both are left out in the Sun, which of the following would happen?

• Object A would likely heat up faster than object B and absorb half the energy to do so.

• Object B would likely heat up faster than object A and absorb half the energy to do so.

• Object A would likely heat up faster than object B and absorb twice the energy to do so.

• Object B would likely heat up faster than object A and absorb twice the energy to do so.

Multiple Choice

Which insulation would best keep a house cool in the summer?

• rigid urethane foam — R-value - 7.50

• clay brick — R-value - 0.11

• solid wood — R-value - 1.25

• wood shavings — R-value - 2.42

I can...

​... describe and compare simple machines as devices that transfer energy and multiply forces or distances

• analyze and describe simple machines as devices that transfer energy (e.g., screws, ramps, hammers, hockey sticks, tennis rackets)

• identify the joule and the newton metre as the units of energy and work in the Système international (SI) units

• analyze and describe simple machines as either force multipliers or distance multipliers

• describe all simple machines as having an input force, an output force and a fulcrum (e.g., pulleys, doorknobs, winches)

Ms. A

Multiple Choice

Which part is found in the middle of a first class lever?

• fulcrum

• resistance

• effort

• load

Multiple Choice

Which of the following is a second class lever?

• ax

• baseball

• wheelbarrow

• seesaw

Multiple Choice

What are the two components of work?

• time and effort

• length and distance

• force and effort

• force and distance

Multiple Choice

Which of the following pairs of levers tend to be force multipliers?

• 4th and 5th class

• 1st and 2nd class

• 1st and 3rd class

• 2nd and 3rd class

Multiple Choice

How many movements does a simple machine have?

• one

• two

• three

• four

I can...

​... describe and compare simple machines as devices that transfer energy and multiply forces or distances

• develop the relationship Fd, by measuring the force (F) applied to the object and the distance (d) the object is moved in the direction in which the force is applied (e.g., use a balance beam [teeter-totter] to establish equilibrium, placing differing masses at various distances)

• explain the functioning of common household machines, in terms of force multipliers and ways in which work is made easier (e.g., can openers, crowbars, car jacks, scissors and hedge clippers)

• explain the need to encourage and support the development of machines that are efficient and rely upon renewable energy sources (e.g., hand-wound radios, solar-powered calculators, solar cookers)

Ms. A

That's a wrap on Unit B

To do:

• Physics Review

• Unit B Review Questions

Ms. A