DENSITY SCI

Question 1

density = ?
mass = ?
volume = ?

Answer 1

Density - mass divided by volume
mass = density x volume
volume = mass divided by density

Question 2

chromatography is…

Answer 2

Chromatography this is a technique used to separate a mixture of dyes in ink, for example.

Different colours in the dyes are carried different distances and hence are separated from each other.

Question 3

evaporation is

Answer 3

evaporation of water from the salt solution takes place when the solution is heated.

A residue of salt is left behind.

Question 4

filtration

Answer 4

Filtration is being used to separate chalk and water.

· Chalk is the residue and water is the filtrat

Question 5

apparatus used to seperate water and soil

Answer 5

Apparatus used to separate water and soil.

· The soil (residue) remains behind on the filter paper.

· The water (filtrate) passes through the filter paper.

Question 6

the circulatory system

Answer 6

living things need a transport system to carry substances around the body.
the human transport system is known as the circulatory system.
IT CONSISTS OF THE BLOOD, BLOOD VESSELS AND THE HEART

Question 7

what is blood? where does it travel?

Answer 7

blood is a liquid that carries substances to and from our cells
it travels in arteries, veins and capillaries.
our heart pumps blood around the body

Question 8

the functions of the blood

Answer 8

transport
defence against disease
homeostasis eg constant body temperature