Revision Spring 2020

Question 1

physical change

Answer 1

A change where the physical properties changes, but does not make a new substance

Question 2

chemical reaction

Answer 2

A reaction where a new substance is formed

Question 3

After the reaction the number and mass of each type of atoms are the same this is called…

Answer 3

Conservation of mass

Question 4

The 4 categories of drugs

Answer 4

Depressant, Hallucinogens, Stimulants and Painkillers

Question 5

The 3 types of drugs

Answer 5

Medicinal, recreational and illegal

Question 6

What is a drug

Answer 6

Drugs are substances that changes how the brain or the body works

Question 7

smoking affect our body

Answer 7

Cigarettes contains nicotine which can affect our learning and concentration, the gases also does fills lungs which nasty gases

Question 8

atom

Answer 8

The smallest thing that makes up everything

Question 9

element

Answer 9

A group of atoms that are all the same number of protons and neutrons

Question 10

atomic number

Answer 10

The numbers of proton in the nucleus of the atom

Question 11

atomic mass

Answer 11

The approximate number of protons and neutrons in the atom

Question 12

compound

Answer 12

A group of 2 or more atoms that have different numbers of protons and is chemically combined

Question 13

What is a mixture

Answer 13

A group of atoms that have different numbers of protons and is not chemically combined

Question 14

endothermic reaction

Answer 14

A reaction where the temperature of the product is decreased

Question 15

exothermic reaction

Answer 15

A reaction where the temperature of the product is increased

Question 16

after endothermic and endothermic reaction

Answer 16

The temperature of the product slowly becomes a closer temperature to the surrounding due to equilibrium

Question 17

Weight

Answer 17

The force that put you to the ground

Question 18

Friction

Answer 18

A force that pushes against the direction the object is moving toward

Question 19

Unbalanced force

Answer 19

An object that is changing its speed or direction

Question 20

Stationary object

Answer 20

When an object is not moving at all

Question 21

Balanced force

Answer 21

When an object is staying still or moving in the same speed

Question 22

Force measurement

Answer 22

Newton (N)

Question 23

Force measured

Answer 23

In newtonmeter

Question 24

illegal drugs examples

Answer 24

Cocaine, cannabis, heroin and ecstasy

Question 25

Drag force

Answer 25

He did you move through air or water and something is losing you down

Question 26

Periodic table

Answer 26

Elements arranged and so with the fact the ones with similar properties is grouped together

Question 27

Properties of metal

Answer 27

Strong, malleable, often appear shiny, conduct heat and electricity, solid in room tempreture

Question 28

Properties of non-metals

Answer 28

Often gases in room temperature, dull appearance, brittle structure and doesn’t conduct electricity

Question 29

Resultant force

Answer 29

The overall force acting on the object

Question 30

Calculation of resultant force

Answer 30

The difference between 2 forces that are acting in the opposite directions

Question 31

Reaction absorbs energy

Answer 31

Endothermic reaction

Question 32

Reaction releases energy

Answer 32

Exothermic reaction

Question 33

Pressure measured

Answer 33

Newton per square meter (N/m2/ Pascal (P)

Question 34

Burning a solid increases mass

Answer 34

Because oxygen reacted with the solid

Question 35

The increase in mass and the element that reacted with the reactant

Answer 35

Is the same

Question 36

Digestion

Answer 36

Breaking down large molecule into smaller ones

Question 37

Pancreas

Answer 37

Produces the enzyme

Question 38

Enzyme

Answer 38

Breaks down chemicals

Question 39

Enzymes have different types

Answer 39

To break down different kinds of food

Question 40

Carbohydrase

Answer 40

Breaks down starch or long carbohydrate into glucose/maltose

Question 41

Protease

Answer 41

Breaks down protein to amino acids

Question 42

Lipase

Answer 42

Breaks down fats into fatty acids and glycerols

Question 43

Oxidation reaction

Answer 43

A reaction where a substance that react with and gain oxygen

Question 44

Reduction reaction

Answer 44

A reaction often where a substance loses oxygen

Question 45

Combustion reaction

Answer 45

A reaction where a fuel and oxygen is involved

Question 46

Combustion reaction is exothermic

Answer 46

This is because it gives out heat

Question 47

Thermal decomposition reaction

Answer 47

A reaction where heat breaks down a substance into 2 new substance

Question 48

Displacement reaction

Answer 48

When a metal compounds reaction with a more reactive metal, then the reactive metals takes the non-metals

Question 49

Neutralization reaction

Answer 49

A reaction when an alkali and acid reacts together to from a substance of a pH scale of 7

Question 50

metalloids

Answer 50

What separates form metals and non-metals

Question 51

Oesophagus

Answer 51

Where the food moves down to the stomach

Question 52

Stomach

Answer 52

Hydrochloric acid breaks foods down and destroy microbes

Question 53

Small intestine

Answer 53

Absorbs small food molecules to the bloodstream

Question 54

Anus

Answer 54

Undigested waste passes out

Question 55

Large intestine

Answer 55

Absorbs valuable water to the bloodstream

Question 56

Rectum

Answer 56

Stores the unusable waste product until it leaves the body through the anus

Question 57

Harmless bacteria

Answer 57

May breaks down foods that are hard for humans

Question 58

Amylase

Answer 58

Enzyme for carbohydrate found in pancreas and saliva