Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
44 Cards in this Set
- Front
- Back
|
WHAT DO WE NEED CARBOHYDRATES FOR? |
So they can fuel the body. Active and growing bodies need a lot of carbohydrates. |
|
|
WHAT DO WE NEED PROTEIN FOR? |
Protein helps people grow and repairs damaged areas. |
|
|
WHAT DO WE NEED FATS AND OILS FOR? |
They store energy which the body can use if it runs out of carbohydrates. |
|
|
WHAT DO WE NEED VITAMINS AND MINERALS FOR? |
Vitamins are only needed in small amounts. They keep vital processes happening. Minerals are found in iron, calcium and sodium and are needed for blood, bones and nerves. |
|
|
WHAT DO WE NEED FIBRE FOR? |
Fibre helps food move around your digestive system. |
|
|
NAME THE MOST IMPORTANT PARTS OF THE LUNGS. |
Lung, Alveoli ( air sacs), Bronchus, Bronchi, Trachea |
|
|
DOES THE MASS CHANGE IN A CHEMICAL REACTION? |
No, it stays the same. |
|
|
WHAT DO ATOMS DO IN A CHEMICAL REACTION? |
They move around but are not created nor destroyed. |
|
|
WHAT IS COMBUSTION? |
Combustion is burning in Oxygen |
|
|
WHAT IS OXIDATION? |
Oxidation is the gain of Oxygen. |
|
|
WHAT IS THERMAL DECOMPOSITION? |
Thermal Decomposition is breaking down with heat. |
|
|
WHAT IS AN EXOTHERMIC REACTION? |
An exothermic reaction is a reaction where heat is given out. |
|
|
WHAT IS AN ENDOTHERMIC REACTION? |
An endothermic reaction is where heat is taken in. |
|
|
WHAT IS THE pH SCALE? |
The pH scale is a scale which shows the strength on an acid or alkali. |
|
|
WHAT ARE INDICATORS? |
Indicators are special dyes which change colour. Litmus paper is a popular indicator, however it only tells you if it is an acid or alkali,. |
|
|
WHAT IS ANYTHING BELOW 7 ON THE pH SCALE? |
An acid- e.g Sulphuric Acid, which can be used in car batteries. |
|
|
WHAT IS ANYTHING ABOVE 7 ON THE pH SCALE? |
An alkali- e.g Sodium Hydroxide, which can be used in cleaning products. |
|
|
WHAT IS 7 ON THE pH SCALE? |
It is neutral- e.g water |
|
|
WHAT DO ACIDS AND ALKALIS DO TO EACH OTHER? |
They neutralise each other. |
|
|
WHAT IS THE REACTIVITY SERIES? |
Potassium(K), Sodium(Na), Calcium(Ca)- VERY REACTIVE Magnesium(Mg), Aluminum(Al) (carbon) Zinc(Zn)- FAIRLY REACTIVE Iron(Fe), Lead(Pb) (hydrogen), Copper(Cu)- NOT VERY REACTIVE Silver(Ag), Gold(Au)- NOT AT ALL REACTIVE |
|
|
CAN WAVES BE REFLECTED? |
Yes, they can. This causes the direction of the wave to change. |
|
|
WHAT HAPPENS WHEN LIGHT HITS A MIRROR? |
When light hits a mirror, the light rays reflect off the smooth shiny surface of the mirror, creating two angles, the angle of incidence and the angle of reflection. |
|
|
WHAT IS THE LAW OF REFLECTION? |
ANGLE OF INCIDENCE=ANGLE OF REFLECTION ANGLE i= ANGLE r |
|
|
WHAT IS REFRACTION? |
Refraction is when light bends as it crosses a boundary. |
|
|
WHAT WILL LIGHT DO TO OPAQUE AND TRANSPARENT MATERIALS? |
Light travels through anything transparent, but nothing opaque. |
|
|
WHAT IS A NORMAL? |
A normal is an invisible line that separates two different rays of light that have been sent to and back from a mirror. |
|
|
WHAT HAPPENS WHEN LIGHT TRAVELS FROM, FOR EXAMPLE, AIR TO GLASS?
|
When light goes from a LESS dense medium to a MORE dense medium, light bends TOWARDS THE NORMAL. |
|
|
WHAT HAPPENS WHEN LIGHT TRAVELS FROM, FOR EXAMPLE, GLASS TO AIR? |
When light goes from a MORE dense medium to a LESS dense medium, light bends AWAY FROM THE NORMAL. |
|
|
WHAT HAPPENS WHEN LIGHT HITS A GLASS BLOCK? |
1) Light hits the glass at an angle, slows down and bends. 2) The light goes towards the normal. 3) As it leaves the glass, it bends away from the normal. 4) If the light hits the glass straight on, it will go straight through. |
|
|
WHAT IS WHITE LIGHT? |
White light is not just a single colour. It is a mix of all the colours. |
|
|
WHAT IS THE SPECTRUM? |
The spectrum is all the colours in rainbow order, and an easy way to remember is - Richard Of York Gave Battle In Vain- Red, Orange, Yellow, Green, Blue, Indigo, Violet. Red has the lowest frequency while violet has the highest. |
|
|
WHAT DO COLOURED FILTERS DO? |
Coloured filters only allow their filter to go through. All the other colours are absorbed. |
|
|
WHY ARE BLUE JEANS BLUE? |
Blue jeans are blue because they reflect blue light while absorbing all the others. |
|
|
WHAT DO WHITE AND BLACK LIGHT DO? |
White light REFLECTS all colours, while black light ABSORBS all colours. |
|
|
WHY DO OBJECTS CHANGE COLOUR IN DIFFERENT LIGHT? |
Objects change colour in different lights because they absorb and reflect certain colours. In white light, a red boot looks red with green laces, in red light it looks red with black laces, and in green light, the shoe looks black with green laces. |
|
|
WHAT IS AN AMMETER? |
An Ammeter is something that measures current. |
|
|
WHAT IS A VOLTMETER?
|
A Voltmeter measures potential different in a circuit. |
|
|
WHAT IS A SERIES CIRCUIT? |
A series circuit is a circuit with no choice of route. |
|
|
WHAT IS A PARALLEL CIRCUIT?
|
A parallel has a choice of route, for example it has a choice to go to route 1, route 2 or route 3. |
|
|
WHAT ARE MAGNETS SURROUNDED BY? |
They are surrounded by magnetic fields. |
|
|
WHAT WILL A COMPASS DO? |
A compass will show you where the fields are. |
|
|
WHAT DO OPPOSITE AND LIKE POLES DO TO EACH OTHER? |
Opposite poles (North and South), are attracted to each other, while like poles (South and South or North and North) do not attract, they repel. |
|
|
WHAT IS AN ELECTROMAGNET? |
An electromagnet is a magnet which you can turn on and off. |
|
|
HOW DO YOU INCREASE THE STRENGTH OF AN ELECTROMAGNET? |
You: 1) Add more current to the wire 2) Add more turns to the solenoid 3) Add a core of soft iron inside the solenoid. |
