1. **State the problem:** We need to find how many times greater the mass of the walrus (1000 kg) is compared to the mass of the flying squirrel ($1 \times 10^{-1}$ kg). 2. **Write down the given values:** - Mass of walrus = 1000 kg - Mass of flying squirrel = $1 \times 10^{-1}$ kg = 0.1 kg 3. **Set up the ratio:** To find how many times greater the walrus's mass is, divide the walrus's mass by the flying squirrel's mass: $$\text{Ratio} = \frac{1000}{0.1}$$ 4. **Calculate the ratio:** $$\frac{1000}{0.1} = 1000 \times 10 = 10000$$ 5. **Interpret the result:** The walrus's mass is 10,000 times greater than the mass of the flying squirrel. **Final answer:** The walrus is about 10,000 times as massive as the flying squirrel.