1. Unit Vocabulary Review

Target Word Bank

Question 1: Fill in the missing word

To express measurements based on powers of ten, the metric system uses a ____ point rather than fractions.

Type the target word in lowercase.

Question 2: Select the correct vocabulary item

Before buying paint, it is wise to make a quick _____ of how much liquid you will need for the whole room.

Question 3: Fill in the missing word

When measuring the size of a pipe across its widest circular middle point, you measure its ____.

Type the target word in lowercase.

Question 4: Select the correct vocabulary item

In international trade, using a single _____ set of units helps avoid misunderstandings between countries.

Question 5: Fill in the missing word

Scientists need measurements to be ____ so that repeating an experiment gives the same results every time.

Type the target word in lowercase.

2. Match Common Collocations

1. accurate estimate

Choose the meaning that fits this phrase:

2. standard unit

Choose the meaning that fits this phrase:

3. pressure gauge

Choose the meaning that fits this phrase:

4. outer diameter

Choose the meaning that fits this phrase:

5. consistent value

Choose the meaning that fits this phrase:

6. convert litres

Choose the meaning that fits this phrase:

4. History & Fun Facts

Source reference: French national metrology laboratory (LNE 2026).

Source reference: French national metrology laboratory (LNE 2026).

Why do some countries still use old units while others use only metric ones?

Record your spoken response below. AI will grade your answer on all four criteria.

[Bài tập luyện nói]

Well, to be honest, I think it mostly comes down to habit. People are just used to the old system in their daily lives. For example, my grandfather still measures things in inches when he does woodworking at home, even though we learned centimetres at school. It's really hard to get used to new units when everyone around you uses the old ones. That's why some countries keep them. So, um, even if the metric system is easier, old habits die hard.

Would the world be a better place if everyone used the same units?

Record your spoken response below. AI will grade your answer on all four criteria.

[Bài tập luyện nói]

I guess it would make life a lot easier for everyone. Having a standard unit across all countries would stop confusion when buying goods or sharing recipes online. Um, I remember trying to follow a cake recipe from another country last month, and I had to figure out how many grams all the ounces were before baking. It took so much extra time! Honestly, I think young people would find life simpler too. So, yeah, if everyone shared one metric system, trade and daily life would go smoothly.

Is it more important for a measurement to be exact or to be quick?

Record your spoken response below. AI will grade your answer on all four criteria.

[Bài tập luyện nói]

Well, it depends on what you're doing, really. If you're building a house or fitting furniture, you need an exact measurement so things don't break. But if you're just cooking dinner, a rough estimate is usually fine. Um, last week I was making soup, and I just guessed how much water to use instead of using a measuring jug, and it turned out great. That works for me. So, I'd say speed matters in daily chores, but precision is key for getting things right.

How can parents help children to understand numbers and measuring?

Record your spoken response below. AI will grade your answer on all four criteria.

[Bài tập luyện nói]

I think the best way is to keep it simple and involve kids in fun practical tasks at home. Parents can let children use a tape measure to check their own height or help out in the kitchen. Um, when I was little, my mother used to let me weigh flour on our kitchen scale, and that helped me understand grams without feeling bored. Honestly, children love to measure things themselves. So, doing hands-on activities really helps ideas stick in their minds.