Module 4 Additional Science

These cards are quick, easy and simple revision notes for Module 4 Additonal Science OCR 21st century Science GCSE.

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  • Created by: Sophie
  • Created on: 09-05-11 19:40

Homeostasis

 

 

Define Homeostasis

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Homeostasis

 

 

Maintaining a constant internal enviroment.

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Atoms

 

 

In the nucleus of an atom it contains:

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Atoms

 

 

Protons and Neutrons.

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Speed

 

 

The formula for speed is:

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Speed

 

 

Speed = Distance/Time

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Strenuous Exercise

 

 

The effects of Strenuous Exercise are:

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Strenuous Exercise

Temperature increases - When you exercise you generate heat, so your temperature increases.

Water content - During exercise more water is lost in sweat through the skin as you get hotter and more water vapour is lost from your lungs as your breathing rate increases.

Salt levels - sweat contains salt, so if you sweat a lot the level in your body will decrease.

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Line Spectrums

 

 

When heated, what colour flames are produced for Lithium, Sodium and Potassium?

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Line Spectrums

 

Lithium - produces a red flame

Sodium - produces a yellow/orange flame

Potassium -  produces a lilac flame

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Distannce - time graphs

 

The gradient for a distance time graph equals...

Flat sections are....

Downhill sections mean...

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Distance - time graphs

 

...Speed

..when it's stopped

....it's coming back toward its starting point

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Diffusion

 

 

Define Diffusion

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Diffusion

 

Diffusion is the passive overall movement of particles from a region of their higher concentration to a region of their lower concentration.

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State symbols

 

What physical state do these state symbols tell you there in?

(s)   (l)    (g)   (aq)

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State symbols

 

(s) - Solid

(l) - Liquid

(g) - Gas

(aq) - Dissolved in water

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Velocity - time graphs

 

The gradiet for a Velocity - time graph equals....

Flat sections represent...

Downhill sections are...

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Velocity - time graphs

 

...acceleration

...steady speed

...deceleration

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Osmosis

 

 

Define Osmosis:

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Osmosis

 

Osmosis is the overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane.

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Comments

Phoebe

Really good apart from some spelling mistakes

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