Science Year 8 revision

HideShow resource information
  • Created by: lucray
  • Created on: 17-05-15 15:54
What does luminous mean?
It produces its own light
1 of 23
What happens in refraction?
Light changes direction when it goes from one surface to another
2 of 23
How long does it take for light to get from the sun to earth?
8.5 minutes
3 of 23
What is the light ray going to the object called?
Incidence ray
4 of 23
One similarity and difference between pinhole and normal cameras?
Both see light, both camera, you can't focus pinhole or see colour or produce their own light. Normal cameras are a lot more expensive.
5 of 23
Which way does the ray ben in refraction?
Towards the normal
6 of 23
Name the colours in order of the rainbow
Red orange yellow green blue indigo violet
7 of 23
what colour does litmus turn for acids and alkalis?
acids- red alkalis- blue
8 of 23
Give an example of a corrosive substance
concentrated sulphuric acid
9 of 23
Give an example of when neutralisation is needed
Dealing with insects and wasp stings, keeping foods at the right ph, controlling indigestion, cleaning our teeth
10 of 23
Give an example of a strong acid and a weak alkali
acid- sulphuric acid alkali- wet washing powder
11 of 23
Name the seven life processes
Movement, respiration, sensitivity, growth, reproduction, excretion and nutrition
12 of 23
Name three types of microbes in size order
Viruses, bacteria, fungi
13 of 23
What is the word equation for fermentation?
glucose- carbon dioxide + ethanol +(energy)
14 of 23
Name three ways diseases are spread
mother to child, person to person, touching, sneezing, animals, from the air
15 of 23
What ways does our body stop us from getting ill?
scabs, mucus, white blood cells, stomach acid, skin
16 of 23
what ways can we stop disease from spreading?
disposing of sewage, adding chlorine to water, drying, freezing or refrigerating foods, pasteurising milk, using disinfectants and soap, immunising people
17 of 23
Name some properties of metals?
Good conductors of heat and electricity, shiny, solids, left side of the periodic table, malleable, ductile, sometimes magnetic
18 of 23
What is an alloy and give an example?
An alloy is a mixture of two or more metals, or a metal and another substance such as carbon. Eg. brass- copper and zinc
19 of 23
What is the word equation for rust?
iron+ oxygen- iron oxide
20 of 23
What substance is oxygen dissolved in, in the blood?
Haemoglobin
21 of 23
What order does oxygen go through the lungs in?
trachea- bronchus- alveoli- air sacs
22 of 23
What carries blood away from the heat/ to the heart?
Veins carry de-oxygenated blood and go to th
23 of 23

Other cards in this set

Card 2

Front

What happens in refraction?

Back

Light changes direction when it goes from one surface to another

Card 3

Front

How long does it take for light to get from the sun to earth?

Back

Preview of the front of card 3

Card 4

Front

What is the light ray going to the object called?

Back

Preview of the front of card 4

Card 5

Front

One similarity and difference between pinhole and normal cameras?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar All resources:

See all All resources »See all science resources »