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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
What is Radiation?
Movement of heat through waves. The heat transfers when waves collide with particles.
26
What is the Penentrating Power of the 3 types of radiation?
Aplha - Low (0.05mm), Beta - Mid (4mm), Gamma - very high.
27
What is Electricity?
Electricity is the movement of electrons around a circuit or on a surface.
28
What are the 2 types of circuits?
Parallel and Series Circuit
29
What is an Isotope?
Isotopes are atoms of the same element with different number of neutrons
30
What happens in a Parallel circuit?
All the components are connected in multiple loops.
31
What is a battery?
Two or more cells joined together
32
What is an example of an endothermic reaction?
Cooking
33
What is a cell?
A source of electricity which produces a voltage
34
What is a crossed wire?
Two wires that cross each other
35
How are Isotopes annotated as?
Element - atomic mass
36
What is a lamp/light?
Produces light in a circuit.
37
What is a connected wire?
Two wires that are connected
38
What are the effects on the nucleus by the 3 types of Radiation
Alpha: -2p, -2n (-4 mass), Beta: +1 atomic number, Gamma: No change
39
What is a Series Circuit?
All electrical components are connected in one loop
40
What is an Ammeter?
It helps measure the amount of current flowing through a circuit
41
What is Chemical Energy?
Energy that is stored in the chemical bonds of a substance.
42
What is a Resistor?
It shows the amount of currents flowing through a circuit
43
What is a switch?
A potential break in a circuit that can be closed and opened
44
Draw an Endothermic Diagram and how do products feel?
Products feel cold
45
What is a wire?
Allows flow of energy
46
What is a voltmeter?
Measures the potential differences (voltage) across a circuit component
47
How many electrons can each shell hold?
1st Shell: 2, 2nd Shell: 8, 3rd Shell: 8, 4th Shell: 18 (not needed in year 9).
48
What is voltage?
"Pushing" power of a cell/battery
49
What is Resistance?
"Pushback" of an electrical component
50
Can you draw a bohr model properly?
Answers may vary on different elements.
51
What is Resistance measured in?
Ohms
52
What is Current?
How fast electrons move in a circuit. Measured in amps (I)
53
What is Ohms Law?
V = I*R
54
What is the mass of an Alpha particle
4amu
55
What is a traverse wave?
Particles move at right angle to the motion of the waves. (Left - Right).
56
What is a longitudinal wave?
Particles move in the same direction as the motion of the wave. (Up and down, like a bumpy flow.)
57
What are the 3 main types of reaction with acids.
Acid + Metal, Acid + Base, Acid + Carbonate
58
Define Half-Life
The amount of time taken for 50% of an element to decay to its daughter's element
59
What is reflection?
Reflection is when light changes direction at the same angle as it comes in and goes out.
60
What is refraction?
Refraction is the result of waves changing speed as they move from one media to another.
61
What is the circuit symbol for a cell?
--|!--
62
What is the circuit symbol for a battery
--|!|!|!--
63
What is the circuit symbol for a resistor
--[___]-- (top is closed too.)

Year 9, Term 2 Revision (2 decks)

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