Look at this table of densities.

Material	Density in $\mathrm{kg}/{\mathrm{m}}^3$
Pure water (Liquid)	$1000$
Pure ice (Solid Water)	$917$
Seawater (liquid water with added salt and minerals)	$1030$
Wood (pine)	$700$

Explain by referring to density why wood is a good material to use to build a boat.

Moments, pressure and density all involve measurements of length. Use words from the list to complete the sentences and equations below.

(distance, area, volume, force, mass)

The equation is moment = 

Moments, pressure and density all involve measurements of length. Use words from the list to complete the sentences and equations below.

(distance, area, volume, force, mass)

The equation of pressure is  = 

Moments, pressure and density all involve measurements of length. Use words from the list to complete the sentences and equations below.

(distance, area, volume, force, mass)

The equation of density is  =