How concentrated is it? Comparing solutions
Grade 8 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A beaker holds 10 dots of dissolved salt in 200 mL. Split it into 100 mL parts. How many dots are in each part, Bo?
Esme draws 18 dots of dissolved sugar in a 600 mL jug. How many dots are in each 100 mL?
Both beakers hold 6 dots. Which solution is more concentrated, Kira?
- Beaker B, as it holds more liquid
- Neither: they have the same dots
- Beaker A
Beaker A has 10 dots in 200 mL. Beaker B has 5 dots in 100 mL. Which is more concentrated, Luz?
- Beaker B, as it has less water
- They are the same
- Beaker A, as it has more dots
Milo adds more water to a glass of sugar water and stirs. What happens to its concentration?
- It goes down
- It goes up: more liquid
- The sugar disappears
- It stays the same: same sugar
Noah stirs more sugar into the same glass of water until it dissolves. What happens to its concentration?
- It goes up
- It turns into a new substance
- It stays the same: same water
- It goes down
Pia pours half of a glass of sugar water into a second glass. How does the concentration in each glass compare with before?
- It is zero in the second glass
- It is the same as before
- It is half as strong: half the sugar
- It is twice as strong: less water
Ren's glossary has a blank by concentration. Which meaning belongs there?
- How much is dissolved, whatever the amount of liquid
- How much liquid there is
- How fast something dissolves
- How much is dissolved in a set amount of liquid
Next, Tala fills in the word dilute. Which meaning belongs there?
- Dissolved very slowly
- A small beaker
- Little dissolved in each 100 mL
- Little liquid in the beaker
A tiny cup and a huge jug hold lemonade of the same strength. What do they share, Zee?
- The same amount of liquid
- The same sugar in each 100 mL
- The same number of lemons
- The same total sugar