Final answer:
The measurements for the given items using SI units are: the mass of a U.S. quarter is 6.5 grams (g), the length of a pencil is 0.15 meters (m), the width of a two-lane road is 10 meters (m), and the volume of beer in a six-pack is 1.2 liters (L).
Step-by-step explanation:
The international system of units, or SI units, is fundamental for clear communication in science, especially in fields like chemistry and physics, where precise measurements are crucial. Let's fill in the missing unit symbols for the given measurements using the appropriate SI units.
- The mass of a U.S. quarter = 6.5 g (grams)
- The length of a pencil = 0.15 m (meters)
- The width of a two-lane road = 10 m (meters)
- The volume of beer in a six pack = 1.2 L (liters)
A number indicates how much, but the unit indicates of what. For example, without units, a number like 6 can represent anything from 6 meters to 6 milliliters, depending on the context. Therefore, it's always important to include units with any numerical measurement to convey exact information.