Final Answser
The lab instruments that would measure the density of seawater are a balance and a beaker. A balance is essential for accurately measuring the mass of the seawater sample, while a beaker aids in determining its volume. Combining these measurements allows for the calculation of density using the formula: density = mass / volume. This pairing ensures precise measurement of the necessary parameters to derive the density of the seawater accurately.
Step-by-step explanation
Density is the ratio of mass to volume. To determine density, one needs to measure the mass of the substance and its volume. A balance is used to measure mass accurately, while a beaker or graduated cylinder can measure the volume of the liquid.
In the case of seawater, a balance would be utilized to measure the mass of a given volume of seawater, and a beaker could help measure that volume precisely. By dividing the mass obtained from the balance by the volume measured using the beaker, the density of the seawater can be calculated.
In contrast, a caliper measures distances, a stopwatch measures time, a meter stick measures length, and a temperature probe gauges temperature. While these instruments are valuable for various measurements in the lab, they are not directly involved in determining the density of a substance like seawater. The balance and beaker, on the other hand, are specifically used to obtain the necessary parameters (mass and volume) for calculating density.