Density and Relative Density

What does density bottle means?

If the relative density of a substance is $7.1$, what will be its density in SI units?

Write only the numerical value without any units in the given box.

What is the mass in $\mathrm{kg}$ of $5$ ${\mathrm{m}}^3$ of cement of density $3000 \mathrm{kg} {\mathrm{m}}^{-3}$?

Choose from the following: $1500 \mathrm{kg}$, $15000 \mathrm{kg}$, $10000 \mathrm{kg}$

Density of a substance _____ (decreases/ increase) with increase in temperature.

Give the density of water in $\mathrm{kg} {\mathrm{m}}^{-3 }$ at $4 °\mathrm{C}$.