Sccience-Energy and Temperature

Question 1

Unjumble these 6 words
heTrlma

citsalE

culeraN

miChecla

niKtcei

rvantioGtala

Answer 1

Thermal
Elastic
Nuclear
Chemical
Kinetic
Gravitational

Question 2

The heat an object contains is the amount of its thermal energy, measured in ——- .

Answer 2

Joules,or J

Question 3

You measure –a—— in degrees Celsius using a —–b—– . Thermal energy is measured in —-c—-.

A larger amount of water will take —–d——– to heat up but
will store –e—– thermal energy than the smaller object.

However, a larger object will lose it’s heat —f—- than a
smaller object. A cup of tea has —-g—– thermal energy than a
—–h—–.

Answer 3

a=temperature
b=thermometer
c=Joules
d=longer
e=more
f=slower
g=less
h=swimming pool

Question 4

Why does heat transfer happen?

Answer 4

Heat is a type of energy called thermal energy. During heat transfer, thermal energy always moves in the same direction.

Question 4

Wood is a good conductor of heat.
(TRUE OR FALSE)

Answer 4

False, wood is a poor conductor of heat

Question 5

Wood is a good insulator
(TRUE OR FALSE)

Answer 5

True

Question 6

Metal is a poor conductor of heat
(TRUE OR FALSE)

Answer 6

False, Metal is a very good conductor of heat

Question 7

Metal is a good insulator
(TRUE OR FALSE)

Answer 7

False, metal is a very poor insulator

Question 8

How fast do infrared waves go?

Answer 8

They travel at the same speed as light – 300,000,000 m/s.

Question 9

What is the difference between temperature and heat?

Answer 9

Heat is energy.
When an object gains heat energy, its particles start to move more.
Temperature is a measurement of how hot an object is.
The more particles that are moving, and the faster they move, the more heat energy the object has.

Question 10

What is the difference between temperature and energy?

Answer 10

The heat an object contains is the amount of its thermal energy, measured in Joules or J.
The temperature of an object is to do with how hot or cold it is, measured by a thermometer in degrees Celsius
The energy that is needed to increase the temperature of a material depends on:

Mass of material
Required temperature rise
What the material is made of

Question 11

What is conduction?

Answer 11

Conduction is the method of heat transfer in solids but not liquids and gases. This is because solid particles are very close together but the particles in liquids and gases are further.
The best type of solid conductors are metals

Question 12

Why are metals the best conductors?

Answer 12

The outer electrons of metal atoms are not attached to any particular atom. They are free to move between the atoms. This makes them really good at transferring energy from one atom to the next

Question 12

How does heat move through solids?

Answer 12

Conduction

Question 13

What happens to the particles when they are heated?

Answer 13

Vibrate Faster

Question 14

What is a convection current?

Answer 14

Thermal energy is transferred from hot places to cold places by convection. The hot air rises and the cold air falls. This is a convection current.

Question 15

What happens when a fluid is heated?

Answer 15

The heated fluid particles gain energy, so they move about more and spread out. The same number of particles now take up more space, so the fluid has become less dense.

Question 16

List 3 things infrared radiation is used for

Answer 16

Any 3 from:
- Detect signs of breast cancer up to 2 years earlier than previous methods.
- Develop remote controls
- Night vision used by the police and military
- Learn more about our universe
- Find people in fires
- Read the dead sea scrolls (Early Abrahamic texts)