Frost deck

Question 1

what is convection current?

Answer 1

when hot air rises and cool air falls.

Question 2

what is the boiling point of water?

Answer 2

100°C

Question 3

what is the point when water starts to freeze?

Answer 3

0°C

Question 4

why does cool air fall?

Answer 4

it’s more denser.

Question 5

what is the temperature of a body?

Answer 5

37°C

Question 6

how does a solid expand?

Answer 6

When substances expand or contract, their particles stay the same size. It is the space between the particles that changes: The particles in a solid vibrate more when it is heated, and take up more room. The particles in a liquid move around each other more when it is heated, and take up more room.

Question 7

what is heat?

Answer 7

1.
the quality of being hot; high temperature.
“the fierce heat of the sun”
synonyms: hotness, warmth, warmness, high temperature; More
2.
intensity of feeling, especially of anger or excitement.
“conciliation services are designed to take the heat out of disputes”
synonyms: passion, intensity of feeling, ardour, fervour, vehemence, warmth, intensity, animation, earnestness, eagerness, enthusiasm, excitement, agitation; More.

Question 8

how does a hot liquid cool down?

Answer 8

A hot cup of coffee left in a cool room will cool down because the room is … A person standing outside on a cold frosty day will lose heat and so cool down.

Question 9

when does a hot solid retract from expanding?

Answer 9

This property can be useful. … Materials expanding and contracting can also cause problems. … Compares particles in a solid when cold and when hot

Question 10

how hot is the earth?

Answer 10

The hottest place on Earth is in its molten core, where temperatures reach approximately 10,800 degrees Fahrenheit. The surface temperatures on the planet vary widely, but according to NASA, the average surface temperature of the Earth is about 59 degrees Fahrenheit.

Question 11

What unit is Energy measured in?

Answer 11

Energy is measured in joules and comes in many forms.
Some examples are chemical (including food),
nuclear, electrical, heat, light, sound,
potential (gravitational and elastic) and kinetic energy.
We say that energy is transferred when
one form of energy is changed into another form.

We can do useful things when energy is transferred.
For example, if we want to light a room,
we can transfer electrical energy into light energy.
We can do this by switching on a light bulb.
If we want to travel from one place to another,
we can transfer chemical energy into kinetic energy.
We can do this by getting on a bus.

The amount of energy does not increase or decrease during
the transfer, it is only changed from one form into others.
Energy can not be created or destroyed.
This is called “the conservation of energy”
(not the same as conserving energy).
Not all of the energy is changed into the form we want
(the useful form).
Some energy is changed into other forms and is wasted.

Question 12

Name three Forms of Energy?

Answer 12

Energy exists in many different forms. Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. These forms of energy can be transferred and transformed between one another.

Question 13

What does “Energy is Transferred” mean?

Answer 13

This means that thermal energy transfer by radiation can even work in space, but conduction and convection cannot. Radiation is how we can feel the heat of the Sun, even though it is millions of kilometres away in space.

Question 14

What is the Conservation of Energy?

Answer 14

In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another.

Question 15

What unit is Temperature measured in?

Answer 15

celsius

Question 16

What is Temperature a measure of?

Answer 16

Heat and temperature are related, but not the same. Temperature is a measure of the average kinetic energy of the particles of a substance. The higher the temperature of an object, the higher is its kinetic energy. Kinetic energy is a type of energy associated with motion.

Question 17

Does Temperature depend on the Mass of a Substance?

Answer 17

When heat energy is transferred to an object, its temperature increase depends upon: the mass of the object. the substance the object is made from. the amount energy transferred to the object.

Question 18

Does Heat depend on the Mass of a Substance?

Answer 18

Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance. Heat energy depends on the speed of the particles, the number of particles (the size or mass), and the type of particles in an object.

Question 19

Can Heat be Transferred by Conduction in a Solid?

Answer 19

Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass. The method used to transfer heat is usually the one that is the most efficient.

Question 20

Can Heat be Transferred by Conduction in a Liquid?

Answer 20

Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.

Question 21

Is the Conduction of Heat in Non-metals Fast?

Answer 21

Heat energy can move through a substance by conduction. Metals are good conductors of heat but non-metals and gases are usually poor conductors of heat. Poor conductors of heat are called insulators. Heat energy is conducted from the hot end of an object to the cold end.

Question 22

Is the Conduction of Heat in Metals Fast?

Answer 22

Heat energy can move through a substance by conduction. Metals are good conductors of heat but non-metals and gases are usually poor conductors of heat. Poor conductors of heat are called insulators. Heat energy is conducted from the hot end of an object to the cold end.

Question 23

Can Heat be Transferred by Convection in a Liquid?

Answer 23

Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. … The denser cold liquid or gas falls into the warm areas.

Question 24

Can Heat be Transferred by Convection in a Gas?

Answer 24

This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. … The denser cold liquid or gas falls into the warm areas. In this way, convection currents that transfer heat from place to place are set up.

Question 25

What are Convection Currents caused by?

Answer 25

Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth. In the atmosphere, as air warms it rises, allowing cooler air to flow in underneath.

Question 26

How can the Efficiency of a Radiator be Improved?

Answer 26

Remove trapped air - Over time, air can become trapped inside your radiators. … Too many coats of paint on a radiator reduces the efficiency of the radiator. … Improve control - The installation of TRVs (thermostatic radiator …

Question 27

Heat Radiation is what type of Wave?

Answer 27

All objects emit (give out) and absorb (take in) thermal radiation, which is also called infrared radiation. The hotter an object is, the more infrared radiation it emits. Infrared radiation is a type of electromagnetic radiation, which involves waves rather than particles.

Question 28

What type of Objects Transfer Heat by Radiation?

Answer 28

Thermal radiation is one of the principal mechanisms of heat transfer. It entails the emission of a spectrum of electromagnetic radiation due to an object’s temperature. Other mechanisms are convection and conduction.

Question 29

Why is part of the Space Shuttle covered in Matt Black Tiles?

Answer 29

Why the space shuttle can withstand reentry temperatures up to 2300 degrees. … When the outer portion of a tile gets hot, the heat takes a long time to work its way … Black tiles work by reflecting about 90 percent of the heat they’re exposed to … tiles are covered with a whitewash of silica compounds and aluminum oxide;

Question 30

What does a Heat Insulator do?

Answer 30

A thermal insulator is something that prevents heat from moving from one place to another. There are 3 main ways that heat can travel: convection, conduction, and radiation. Typically the phrase ‘thermal insulator’ refers to a material that blocks conduction.

Question 31

How does the Fur of Animals keep them Warm?

Answer 31

Insulation is used to keep hot things hot and cold things cold. Animals have a variety of different mechanisms to keep warm. Blubber (fat, like lard) and fur keep Arctic animals warm. Down feathers trap a layer of air next to the body to help keep birds warm.

Question 32

How can Air Transfer Heat across the Gap in Cavity Walls?

Answer 32

If an air space is left between two layers making a wall or roof in any building, the air … Heat is transferred across an air space by a combination of conduction, … to ventilate the air gap between the roof and the ceiling, then we could expect a …

Question 33

What Material can be used to fill the Gap in Cavity Walls?

Answer 33

Cavity wall insulation fills that gap, keeping the warmth in to save energy. … You can use the Energy Saving Trust’s Home Energy Check tool to work out what sort … Cavity wall insulation can be made from three types of material: mineral wool.

Question 34

What is a Loft?

Answer 34

a room or space directly under the roof of a house or other building, used for accommodation or storage.

Question 35

hat Material can be used to Insulate a Loft?

Answer 35

Loose-fill loft insulation. This is made from a variety of granular or lightweight materials such as cork granules, mineral wool or cellulose fibre. Greener types of loose-fill insulation include recycled newspaper.

Question 36

How does Double Glazing Reduce Heat Loss?

Answer 36

Image result for How does Double Glazing Reduce Heat Loss?
Heat loss through windows can be reduced using double glazing. The gap between the two panes of glass is filled with air. Heat loss through conduction is reduced, as air is a poor conductor of heat. Heat transfer by convection currents is also reduced by making the gap is very narrow.

Question 37

Does Draught Proofing Reduce Heat Loss by Conduction or Convection?

Answer 37

There are some simple ways to reduce heat loss, including fitting carpets, curtains and draught excluders. Heat loss through windows can be reduced using double glazing. The gap between the two panes of glass is filled with air. Heat loss through conduction is reduced, as air is a poor conductor of heat.

Question 38

How can Heat Loss by Radiation or Reduced?

Answer 38

Heat loss through windows can be reduced using double glazing. There may be air or a vacuum between the two panes of glass. Air is a poor conductor of heat, while a vacuum can only transfer heat energy by radiation. Heat loss through walls can be reduced using cavity wall insulation.

Question 39

What is Cost-Effectiveness?

Answer 39

Cost-effectiveness analysis (CEA) is a form of economic analysis that compares the relative costs and outcomes (effects) of different courses of action. Cost-effectiveness analysis is distinct from cost–benefit analysis, which assigns a monetary value to the measure of effect.

Question 40

what is heat?

Answer 40

heat is how we get hot.;