Video Transcript
We can measure volume in milliliters. Which container has more water? How much more water is in that container than the other?
We know that this is a question about volume and we’re told that we can measure volume using milliliters. And if we look at the scale on each of the containers, we can show that they’re measuring an amount of mL or milliliters. We have to work out which container has more water. To answer the question, we need to use each of the scales to compare the amount of water in each container. The pink arrows show the level of water in each container.
We might be mistaken into thinking that the second container has the most water because it looks as if the volume of water in this container is higher. The level of the water in this container certainly looks higher, but that wouldn’t be the correct way to compare. We need to look more closely at the scale on each container. The first container holds 100 milliliters of liquid. And the scale on the second container only goes up to 50 milliliters. Both containers hold different amounts. The first container can actually hold more water.
If we look more closely at the first container, we can see that the level of water shown by the pink arrow is between 40 and 50 milliliters. In fact, the pink arrow is halfway between the 40 and 50 mark. So, this means that the amount of water in the first container is 45 milliliters. Let’s look more closely at the second container. The pink arrow is halfway between the numbers 30 and 40 on the scale. The number 35 is halfway between 30 and 40. So, this means that there is 35 milliliters of water in the second container. 45 is more than 35. So, this is the container which has more water.
Now, we can answer the second part of the question, which asks how much more water is in this container than the other. We know the first container has 45 milliliters, and the second container has 35 milliliters of water. So, we have to find the difference between 45 and 35. The difference between 45 and 35 is 10. So, there is 10 milliliters more water in the first container than the second.
