Grade 2 · Science · Unit 7 of 12
Mixtures & Materials
Dissolve, sink, float, absorb
What your child practises
Mixing liquids and solids (dissolving, separating), what sinks or floats, and which materials soak up or push away water.
Ontario Curriculum expectation: C2.2, C2.5, C2.6 · properties of liquids and solids, useful mixtures, and whether solids sink, float, absorb or repel water
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Which one is a liquid?
- 🥛milk
- 🪵a block of wood
- 🧱a brick
Show answer
🥛 milk
Hint: Liquids flow and can be poured.
Question 2
Sugar is stirred into warm water. What happens?
🍬- It turns into ice
- It floats on top forever
- It dissolves into the water
Show answer
It dissolves into the water
Hint: Dissolving means the sugar mixes in so we cannot see the pieces.
Question 3
When oil and water are mixed, what happens?
- They become one smooth liquid
- They stay separate
- They turn solid
Show answer
They stay separate
Hint: Oil floats on top of water.
Question 4
Which will float in water?
- 🪵a wooden stick
- 🪙a coin
- 🪨a rock
Show answer
🪵 a wooden stick
Hint: Wood is less dense than water, so it floats.
Question 5
Which will sink in water?
- 🥄a wooden spoon
- 🍃a leaf
- 🔑a metal key
Show answer
🔑 a metal key
Hint: A key is heavy for its size, so it sinks.
Question 6
When you stir cocoa powder into milk, you make…
- a new animal
- a rock
- a mixture
Show answer
a mixture
Hint: Cocoa and milk are combined, so it is a mixture.