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Science > Revision Spring 2020 > Flashcards

Revision Spring 2020 Flashcards

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Biology 101 flashcards
1
Q

physical change

A

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

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2
Q

chemical reaction

A

A reaction where a new substance is formed

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3
Q

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

A

Conservation of mass

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4
Q

The 4 categories of drugs

A

Depressant, Hallucinogens, Stimulants and Painkillers

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5
Q

The 3 types of drugs

A

Medicinal, recreational and illegal

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6
Q

What is a drug

A

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

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7
Q

smoking affect our body

A

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

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8
Q

atom

A

The smallest thing that makes up everything

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9
Q

element

A

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

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10
Q

atomic number

A

The numbers of proton in the nucleus of the atom

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11
Q

atomic mass

A

The approximate number of protons and neutrons in the atom

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12
Q

compound

A

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

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13
Q

What is a mixture

A

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

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14
Q

endothermic reaction

A

A reaction where the temperature of the product is decreased

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15
Q

exothermic reaction

A

A reaction where the temperature of the product is increased

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16
Q

after endothermic and endothermic reaction

A

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

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17
Q

Weight

A

The force that put you to the ground

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18
Q

Friction

A

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

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19
Q

Unbalanced force

A

An object that is changing its speed or direction

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20
Q

Stationary object

A

When an object is not moving at all

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21
Q

Balanced force

A

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

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22
Q

Force measurement

A

Newton (N)

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23
Q

Force measured

A

In newtonmeter

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24
Q

illegal drugs examples

A

Cocaine, cannabis, heroin and ecstasy

25
Q

Drag force

A

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

26
Q

Periodic table

A

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

27
Q

Properties of metal

A

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

28
Q

Properties of non-metals

A

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

29
Q

Resultant force

A

The overall force acting on the object

30
Q

Calculation of resultant force

A

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

31
Q

Reaction absorbs energy

A

Endothermic reaction

32
Q

Reaction releases energy

A

Exothermic reaction

33
Q

Pressure measured

A

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

34
Q

Burning a solid increases mass

A

Because oxygen reacted with the solid

35
Q

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

A

Is the same

36
Q

Digestion

A

Breaking down large molecule into smaller ones

37
Q

Pancreas

A

Produces the enzyme

38
Q

Enzyme

A

Breaks down chemicals

39
Q

Enzymes have different types

A

To break down different kinds of food

40
Q

Carbohydrase

A

Breaks down starch or long carbohydrate into glucose/maltose

41
Q

Protease

A

Breaks down protein to amino acids

42
Q

Lipase

A

Breaks down fats into fatty acids and glycerols

43
Q

Oxidation reaction

A

A reaction where a substance that react with and gain oxygen

44
Q

Reduction reaction

A

A reaction often where a substance loses oxygen

45
Q

Combustion reaction

A

A reaction where a fuel and oxygen is involved

46
Q

Combustion reaction is exothermic

A

This is because it gives out heat

47
Q

Thermal decomposition reaction

A

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

48
Q

Displacement reaction

A

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

49
Q

Neutralization reaction

A

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

50
Q

metalloids

A

What separates form metals and non-metals

51
Q

Oesophagus

A

Where the food moves down to the stomach

52
Q

Stomach

A

Hydrochloric acid breaks foods down and destroy microbes

53
Q

Small intestine

A

Absorbs small food molecules to the bloodstream

54
Q

Anus

A

Undigested waste passes out

55
Q

Large intestine

A

Absorbs valuable water to the bloodstream

56
Q

Rectum

A

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

57
Q

Harmless bacteria

A

May breaks down foods that are hard for humans

58
Q

Amylase

A

Enzyme for carbohydrate found in pancreas and saliva

Science (6 decks)

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