How concentrated is it? Comparing solutions
Grade 8 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
Ari's beaker drawing shows 12 sugar dots in 300 mL of water. How many dots are in each 100 mL?
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?
Two beakers each hold 100 mL. Which solution is more concentrated, Jun?
- Beaker B
- Beaker A
- Neither: they have the same volume
Beaker A has 10 dots in 200 mL. Beaker B has 5 dots in 100 mL. Which is more concentrated, Luz?
- Beaker A, as it has more dots
- They are the same
- Beaker B, as it has less water
Noah stirs more sugar into the same glass of water until it dissolves. What happens to its concentration?
- It goes down
- It stays the same: same water
- It turns into a new substance
- It goes up
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 the same as before
- It is zero in the second glass
- It is twice as strong: less water
- It is half as strong: half the sugar
Ren's glossary has a blank by concentration. Which meaning belongs there?
- How much is dissolved in a set amount of liquid
- How fast something dissolves
- How much liquid there is
- How much is dissolved, whatever the amount of liquid
Next, Tala fills in the word dilute. Which meaning belongs there?
- Little liquid in the beaker
- Dissolved very slowly
- Little dissolved in each 100 mL
- A small beaker
A tiny cup and a huge jug hold lemonade of the same strength. What do they share, Zee?
- The same sugar in each 100 mL
- The same total sugar
- The same number of lemons
- The same amount of liquid