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History Ks3 exam revision > Science > Flashcards

Science Flashcards

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1
Q

What is a simple chemical reaction?

A

A chemical reaction is when atoms are rearranged to create a new substance(s).

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2
Q

List examples of simple chemical reactions

A

Baking, washing your hands, BBQ

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3
Q

What is The PH scale

A

The Ph scale is a measurement of how acidic or Alkaline a solution is.

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4
Q

What are the 3 indicators?

A

Litmus Paper: A piece of paper that changes one of 2 colors depending on what solution it is in.

Universal Indicator: A liquid that that changes a specific color depending of the Exact Ph of a solution

Indicator strip: A piece of paper that changes a specific color depending on the Exact Ph of a solution

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5
Q

What is Respiration?

A

Respiration: The act of breaking apart glucose (sugar) for energy

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6
Q

What is the equation for respiration?

A

GLUCOSE + OXYGEN = CARBON DIOXIDE, WATER, (ENERGY)

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7
Q

What is the test for Carbon dioxide?

A

Lime Water goes cloudy when mixed with Carbon

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8
Q

What is the test for oxygen?

A

When a splint is placed over oxygen, it will RE-light

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9
Q

What is the test for Hydrogen

A

When a splint is placed over Hydrogen it will make a squeaky POP

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10
Q

What happens when metal and acid is mixed?

A

METAL PLUS ACID = SALT PLUS HYDROGEN

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11
Q

What happens when metal and oxygen is mixed?

A

Rust

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12
Q

What is the reactivity series?

A 
Pottasium
Sodium
Calcium
Magnesium
aluminium
Zinc
Iron
Lead
Hydrogen
Copper
Silver
Gold
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13
Q

What are the 4 ways to prevent rust?

A

Galvanising
Oiling
Paint coating
Plastic coating

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14
Q

What is displacement

A

When a more reactive metal pushes out a less reactive metal from its compound

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15
Q

What is the goal for a metal?

A

Metals react to complete a full outer shell by sharing, losing or taking electrons

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16
Q

Proof of chemical reactions:

A 
Changes of colors
Give of gas
Get Hot
Get Cold
Give out light
Make smells
Form solids
Change of state
Change in pH
17
Q

What happens when reactants react

A

Products are produced

18
Q

What is exothermic

A

Exo: Exit in latin
Thermic: Heat
Exothermic: Rections that give of heat

19
Q

What is endothermic

A

Endo: Enter in latin
Thermic: Heat
Endothermic: Reactions that take in heat

20
Q

What is Aerobic respiration?

A

Without the oxygen in the equation (Glucose + oxygen = carbon and water), aerobic respiration occurs. (Fermentation.) Used in Bread and Alcohol

History Ks3 exam revision (3 decks)

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