science

Question 1

How is the temperature different from heat?

Answer 1

Heat transfers cause temperature to change

Question 2

what is conduction?

Answer 2

the transfer of enegy from one thing to another throught contact

Question 3

what is radiation?

Answer 3

the transfer of enegy woithout contact

Question 4

what is convection?

Answer 4

Heat transfer caused by the rising of hotter, less dense fluids and the falling of cooler, more

Question 5

What happens as material heats, expands, and becomes less dense?

Answer 5

it rises

Question 6

What happens as material cools, contracts, and becomes more dense?

Answer 6

it sinks

Question 7

what is energy of motion?

Answer 7

kinetic energy

Question 8

what is a convection current?

Answer 8

Heat transfer caused by the rising of hotter, less dense fluids and the falling of cooler, more dense fluids.

Question 9

what is a conductor?

Answer 9

a substance that readily transfers heat or electrical energy

Question 10

What is an insulator?

Answer 10

a material that does not conduct heat or electrical current

Question 11

What is chemical energy?

Answer 11

A form of potential energy stored in chemical bonds and released through chemical reactions

Question 12

What is mechanical energy?

Answer 12

the sum of the potential and kinetic energy of an object

Question 13

What direction does thermal energy flow?

Answer 13

Thermal energy always moves from substances of higher temperature to substances of lower temperatures.

Question 14

What causes chemical energy?

Answer 14

When there’s a chemical reaction between the molecules of chemical compounds, a new substance may form, and energy may be released

Question 15

Why is lithium’s so powerful

Answer 15

It’s the lightest of all metals, has the best electrochemical potential and is the largest energy density for weight.

Question 16

why do balls bouce higher when they are higher

Answer 16

cause the higher the more potential energy which equals more kinetic energy with equals more bounce bounce

Question 17

What’s an endothermic reaction?

Answer 17

An endothermic reaction absorbs energy from its sounding causing things to cool down.

Question 18

what are the advantages of lithium-ion batteries?

Answer 18

They provide high levels of charge than other battery technologies, and they have a higher voltage,

Question 19

what are the disadvantages of lithium-ion batteries?

Answer 19

It is fragile, expensive, and

Question 20

whats heat

Answer 20

the flow of themrsl energy to a coolor froma warmer object

Question 21

whats the themral enegy

Answer 21

the average sum og kinitic and poninel energy in a system

Question 22

whats an exothermic reaction

Answer 22

energy being transfered to it surrounfidnffg

Question 23

what are forms of head transfer

Answer 23

radation, conduction and convection

Question 24

whats mechinalucal energy

Answer 24

the sum of potintial and kinitic energy

Question 25

radation example

Answer 25

statci gettoing sunburnt

Question 26

whats heta

Answer 26

the flow of thermal energy

Question 27

physocs of a tpaster

Answer 27

toasters use radation because they toast bread using no contct to the heating beams

Question 28

potatoe air preasure chips

Answer 28

as the plane got higher the density decreased which increaed the density of the bag of chips

Question 29

sea panda traits

Answer 29

sea pandas are actaully stronger than sharks

Question 30

convecetion current example

Answer 30

if you skeep on bunk bed the botton of bunk will be coldet than top bevause of convection currents

Question 31

puddles n pond

Answer 31

if you pur hot water in a small pond it will beomce hot but if you pour hot water in a large pond it won becomes hot because theres space for the flow of heat to go toto

Question 32

chemicla energy disvantges

Answer 32

the burning of fosil fuels can cause the pollutuio n to our planet

Question 33

chemical energy advantges

Answer 33

its abdunt in nature and helpburn things to create energy