Science

Question 1

What are protons?

Answer 1

Positive charge

Question 1

What are atoms?

Answer 1

Smallest part of matter and consist of protons, neutrons, and electrons

Question 2

What are neutrons?

Answer 2

Neutral

Question 3

What are electrons?

Answer 3

Negative charge

Question 4

What is an independent variable?

Answer 4

Variable thats changed

Question 5

What is the dependant variable?

Answer 5

Variable thats measured

Question 6

What is a control variable?

Answer 6

Variable kept the same

Question 7

What is fertilisation?

Answer 7

The fusion of male garmetes

Question 8

What is some evidence for chemical change?

Answer 8

Colour, New gas or substance, Absorption of heat

Question 9

What is a compound?

Answer 9

Any substance with 2 or more elements

Question 10

What is a mixture?

Answer 10

A material with 2 or more substances

Question 11

What is a molecule?

Answer 11

2 or more atoms held together by a chemical bond

Question 12

What is solute?

Answer 12

A substance you dissolve

Question 13

What is solvent?

Answer 13

A liquid you dissolve

Question 14

What is a solution?

Answer 14

The mixture formed from the solute and solvent

Question 15

What is soluable?

Answer 15

Able to be dissolved

Question 16

What is insoluble?

Answer 16

Unable to be dissolved

Question 17

What is dilution?

Answer 17

Solvent is added to the solution to make it more dilute

Question 18

What is filtration?

Answer 18

Used to seperate insoluble particles

Question 19

What is distillation?

Answer 19

Used to seperate 2 liquids

Question 20

What is the only energy visible to human eye?

Answer 20

Light

Question 21

What form of energy is light?

Answer 21

Electromagnetic radiation

Question 22

What are the properties of light?

Answer 22

wave length, frequency,energy,speed

Question 23

What is the law of reflection?

Answer 23

The light ray going in is the incident ray, the light ray going out is the reflected ray and the imaginary line in the middle is called the normal

Question 24

What is convex?

Answer 24

Bounces off and spreads out the rays

Question 25

What is concave?

Answer 25

Tarvels inwards

Question 26

What colours make cyan?

Answer 26

Green,blue

Question 27

What colours make magenta?

Answer 27

blue,red

Question 28

What colours make yellow?

Answer 28

red,green

Question 29

What is a medium?

Answer 29

A medium is something sound waves need to travel through

Question 30

Explain white light:

Answer 30

This is a combination of all colours and when it hits a surface it absorbs all the colours and on reflects the colour you see.

Question 31

How fast does sound travel?

Answer 31

340m/s

Question 32

How fast does light travel?

Answer 32

300 000 000m/s

Question 33

Why does light travel at different speads?

Answer 33

Because of the different densities, e.g solid,liquid,gas

Question 34

What is deficiency?

Answer 34

This happens when the body dosen't get the right amount of nutrients

Question 35

What is villi?

Answer 35

Tiny projections made up of cells

Question 36

What is a pancreas?

Answer 36

Controls blood sugar levels

Question 37

What is the liver?

Answer 37

Produces bile and stores products of digestion

Question 38

What is reflection?

Answer 38

When light or sound bounces off a surface back to us

Question 39

What is refraction?

Answer 39

The bending of light or sound waves

Question 40

What is kinetic energy?

Answer 40

Something moving

Question 41

Do energy particles expand?

Answer 41

No, they mover side to side

Question 42

What is the law of conservation energy?

Answer 42

Energy can be changed from one to another but can't be created or destroyed

Question 43

What is conduction?

Answer 43

Heat transferred through direct contact

Question 44

What is radiation?

Answer 44

Heat travelling in waves

Question 45

What is covection?

Answer 45

Heat moving through liquids or gases

Question 46

What are 2 active forms of energy?

Answer 46

kinetic, thermal

Question 47

What are 2 potential forms of energy?

Answer 47

gravitational, elastic

Question 48

What is a convection current?

Answer 48

A circular motion of heat