4) Which is the best estimate for the mass of a microwave? 12 kilograms 12 grams 1 kilogram 1 gram

The best estimate for the mass of a microwave is **12 kilograms**. Here's why:* **Grams** are too small. A gram is about the weight of a paperclip.* **1 kilogram** is a reasonable weight for a small microwave, but most microwaves are larger.* **12 kilograms** is a realistic weight for a standard-sized microwave. Think about how much a microwave weighs when you lift it. It's definitely heavier than a few pounds (kilograms).