Eric has two rock samples. One has a mass of 600 grams and the other has a mass of 1 kg. He recorded the total mass as 7 kg. What did he do wrong? What is the correct answer?
To find the correct answer, let's first convert the masses of the rock samples to the same unit. Since kilograms (kg) are larger than grams (g), we can convert the mass of the rock sample with a mass of 600 grams to kg by dividing it by 1000.
Mass of rock sample 1 = 600 g = 600 / 1000 kg = 0.6 kg
Now, let's add the masses of the two rock samples:
Mass of rock sample 1 + Mass of rock sample 2 = 0.6 kg + 1 kg = 1.6 kg
Therefore, the correct answer is that the total mass of the two rock samples is 1.6 kg.
To identify what Eric did wrong, we can see that he mistakenly added the masses in kilograms without converting the mass of the rock sample in grams to kilograms. As a result, he obtained an incorrect total mass of 7 kg instead of the correct answer, 1.6 kg.
600 g + 1 kg
= 600 g + 1000 g
= 1600 g
= 1.6 kg