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Year 9, Term 2 Revision > Chemistry & Physics > Flashcards

Chemistry & Physics Flashcards

1
Q

What is an Endothermic Reaction

A

Energy is supplied more than released

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2
Q

What is a ph is acidic

A

pH 0-7 is acidic (less than 7)

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3
Q

What does the pH scale represent

A

The pH scale represents how acidic/basic a solution is

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4
Q

What pH is a base

A

pH 7-14 is basic (more than 7)

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5
Q

What is the atomic mass

A

It’s the amount of protons + neutrons an element has

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6
Q

What pH is neutral

A

pH level 7

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7
Q

What is neutralization

A

Neutralization is a reaction between an acid and a base

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8
Q

What is an Exothermic reaction?

A

Energy is being released than supplied.

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9
Q

Example of Acids and Bases

A

Acid+Base forms Salt+Water

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10
Q

Definition of an acid?

A

A substance with particular chemical properties including turning litmus red, neutralising alkalise and dissolving some metals.

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11
Q

What are the compositions of the 3 types of Radiation?

A

Alpha - Helium Particles, Beta - Electron, Gamma - Electro Magnetic-radiation (energy)

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12
Q

How do Acids taste?

A

Acids are sour in taste.

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13
Q

How do Acids feel?

A

They are rough, bumpy, course

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14
Q

What are the masses of the particles?

A

Protons: 1, Electrons: almost 0, Neutrons: 1

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15
Q

What are examples of acids

A

lemon

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16
Q

What happens to the litmus paper when it is put into an acid?

A

It turns red from blue

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17
Q

What is Activation Energy?

A

The energy required to break in bonds in the reactancts for a chemical reaction to occur

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18
Q

What is the definition of a Bases?

A

Substance that can neutralise the acid by reacting with hydrogen ions

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19
Q

How do bases taste?

A

Bitter

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20
Q

What are some examples of an Exothermic reaction?

A

Burning wood

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21
Q

How do bases feel?

A

Slippery

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22
Q

Examples of bases?

A

Bleach, cleaning products

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23
Q

What are the 3 types of Radiation shielded by?

A

Alpha - Paper, cloth. Beta - Metal Foil. Gamma - Led, Concrete.

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24
Q

What happens to the litmus paper when it is put into a base?

A

The litmus paper turns blue from red.

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25
Q

What is Radiation?

A

Movement of heat through waves. The heat transfers when waves collide with particles.

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26
Q

What is the Penentrating Power of the 3 types of radiation?

A

Aplha - Low (0.05mm), Beta - Mid (4mm), Gamma - very high.

27
Q

What is Electricity?

A

Electricity is the movement of electrons around a circuit or on a surface.

28
Q

What are the 2 types of circuits?

A

Parallel and Series Circuit

29
Q

What is an Isotope?

A

Isotopes are atoms of the same element with different number of neutrons

30
Q

What happens in a Parallel circuit?

A

All the components are connected in multiple loops.

31
Q

What is a battery?

A

Two or more cells joined together

32
Q

What is an example of an endothermic reaction?

A

Cooking

33
Q

What is a cell?

A

A source of electricity which produces a voltage

34
Q

What is a crossed wire?

A

Two wires that cross each other

35
Q

How are Isotopes annotated as?

A

Element - atomic mass

36
Q

What is a lamp/light?

A

Produces light in a circuit.

37
Q

What is a connected wire?

A

Two wires that are connected

38
Q

What are the effects on the nucleus by the 3 types of Radiation

A

Alpha: -2p, -2n (-4 mass), Beta: +1 atomic number, Gamma: No change

39
Q

What is a Series Circuit?

A

All electrical components are connected in one loop

40
Q

What is an Ammeter?

A

It helps measure the amount of current flowing through a circuit

41
Q

What is Chemical Energy?

A

Energy that is stored in the chemical bonds of a substance.

42
Q

What is a Resistor?

A

It shows the amount of currents flowing through a circuit

43
Q

What is a switch?

A

A potential break in a circuit that can be closed and opened

44
Q

Draw an Endothermic Diagram and how do products feel?

A

Products feel cold

45
Q

What is a wire?

A

Allows flow of energy

46
Q

What is a voltmeter?

A

Measures the potential differences (voltage) across a circuit component

47
Q

How many electrons can each shell hold?

A

1st Shell: 2, 2nd Shell: 8, 3rd Shell: 8, 4th Shell: 18 (not needed in year 9).

48
Q

What is voltage?

A

“Pushing” power of a cell/battery

49
Q

What is Resistance?

A

“Pushback” of an electrical component

50
Q

Can you draw a bohr model properly?

A

Answers may vary on different elements.

51
Q

What is Resistance measured in?

A

Ohms

52
Q

What is Current?

A

How fast electrons move in a circuit. Measured in amps (I)

53
Q

What is Ohms Law?

A

V = I*R

54
Q

What is the mass of an Alpha particle

A

4amu

55
Q

What is a traverse wave?

A

Particles move at right angle to the motion of the waves. (Left - Right).

56
Q

What is a longitudinal wave?

A

Particles move in the same direction as the motion of the wave. (Up and down, like a bumpy flow.)

57
Q

What are the 3 main types of reaction with acids.

A

Acid + Metal,
Acid + Base,
Acid + Carbonate

58
Q

Define Half-Life

A

The amount of time taken for 50% of an element to decay to its daughter’s element

59
Q

What is reflection?

A

Reflection is when light changes direction at the same angle as it comes in and goes out.

60
Q

What is refraction?

A

Refraction is the result of waves changing speed as they move from one media to another.

61
Q

What is the circuit symbol for a cell?

A

–|!–

62
Q

What is the circuit symbol for a battery

A

–|!|!|!–

63
Q

What is the circuit symbol for a resistor

A

–[___]– (top is closed too.)

Year 9, Term 2 Revision (2 decks)

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