💡 2nd Grade Science: States of Matter Practice Questions
1
Solved Example
Easy Level
💡 Look at the pictures below. Which one is a solid?
A) A glass of juice 🥤
B) A bouncy ball 🏀
C) A cloud in the sky ☁️
Solution & Explanation
Let's find the solid! Solids have their own shape and do not change easily.
A) A glass of juice 🥤 is a liquid. It takes the shape of the glass.
B) A bouncy ball 🏀 is a solid. It keeps its round shape.
C) A cloud in the sky ☁️ is made of tiny water droplets and water vapor, which is a gas (and tiny liquid water droplets).
So, the correct answer is B) A bouncy ball. ✅
2
Solved Example
Easy Level
📌 Which of these is a liquid?
A) A wooden chair 🪑
B) Water in a bottle 💧
C) The air inside a balloon 🎈
Solution & Explanation
Let's identify the liquid! Liquids can flow and take the shape of their container.
A) A wooden chair 🪑 is a solid. It keeps its shape.
B) Water in a bottle 💧 is a liquid. It flows and takes the shape of the bottle.
C) The air inside a balloon 🎈 is a gas. It fills the balloon.
So, the correct answer is B) Water in a bottle. ✅
3
Solved Example
Easy Level
👉 What state of matter is the air you breathe?
A) Solid
B) Liquid
C) Gas
Solution & Explanation
Let's think about air!
Air does not have its own shape and it spreads out to fill any space.
This is how a gas behaves.
So, the air you breathe is a gas. ✅
4
Solved Example
Medium Level
When you put a toy car (a solid) on the floor, it keeps its shape. If you pour juice (a liquid) into a cup, what happens to its shape?
A) It keeps its own shape.
B) It takes the shape of the cup.
C) It disappears.
Solution & Explanation
Let's compare solids and liquids!
A solid, like the toy car, has its own fixed shape.
A liquid, like juice, does not have its own fixed shape. It flows and will always take the shape of the container it is in.
So, when you pour juice into a cup, B) It takes the shape of the cup. ✅
5
Solved Example
Medium Level
Imagine you have an ice cube 🧊 in your hand. After a few minutes, what state of matter will the ice cube become? Why?
Solution & Explanation
Let's think about what happens to an ice cube when it gets warm!
An ice cube is solid water.
When you hold it, the warmth from your hand makes the ice cube get warmer.
When ice gets warm enough, it changes from a solid to a liquid. This change is called melting.
So, the ice cube will become liquid water because it melts from the warmth. ✅
6
Solved Example
Real World Example
On a sunny day, you see a puddle of water 💧 on the sidewalk. After a few hours, the puddle is gone! Where did the water go, and what state of matter did it become?
Solution & Explanation
Let's follow the water in the puddle!
The puddle is made of liquid water.
The sun's heat makes the water warm up.
When liquid water gets warm enough, it can turn into an invisible gas called water vapor and rise into the air. This process is called evaporation.
So, the water went into the air as a gas (water vapor) because it evaporated. ✅
7
Solved Example
Medium Level
When you blow into a balloon 🎈, it gets bigger. What does this tell you about the air (a gas) you are blowing into it?
A) Air is very heavy.
B) Air takes up space.
C) Air is a solid.
Solution & Explanation
Let's think about what happens when you blow up a balloon!
When you blow into a balloon, you are putting more air inside it.
The balloon gets bigger because the air needs somewhere to go.
This shows that even though we can't always see it, air (a gas) takes up space.
So, the correct answer is B) Air takes up space. ✅
8
Solved Example
Real World Example
You are making soup 🍲 on the stove. You see steam rising from the pot. What state of matter is the soup in the pot, and what state of matter is the steam?
Solution & Explanation
Let's identify the states of matter in this everyday situation!
The soup in the pot is something you can stir and pour, so it is a liquid.
When the soup gets very hot, some of the water in it turns into steam. Steam is hot water vapor, which is a gas.
So, the soup in the pot is a liquid, and the steam is a gas. ✅
2nd Grade Science: States of Matter Practice Questions
Example 1:
💡 Look at the pictures below. Which one is a solid?
A) A glass of juice 🥤
B) A bouncy ball 🏀
C) A cloud in the sky ☁️
Solution:
Let's find the solid! Solids have their own shape and do not change easily.
A) A glass of juice 🥤 is a liquid. It takes the shape of the glass.
B) A bouncy ball 🏀 is a solid. It keeps its round shape.
C) A cloud in the sky ☁️ is made of tiny water droplets and water vapor, which is a gas (and tiny liquid water droplets).
So, the correct answer is B) A bouncy ball. ✅
Example 2:
📌 Which of these is a liquid?
A) A wooden chair 🪑
B) Water in a bottle 💧
C) The air inside a balloon 🎈
Solution:
Let's identify the liquid! Liquids can flow and take the shape of their container.
A) A wooden chair 🪑 is a solid. It keeps its shape.
B) Water in a bottle 💧 is a liquid. It flows and takes the shape of the bottle.
C) The air inside a balloon 🎈 is a gas. It fills the balloon.
So, the correct answer is B) Water in a bottle. ✅
Example 3:
👉 What state of matter is the air you breathe?
A) Solid
B) Liquid
C) Gas
Solution:
Let's think about air!
Air does not have its own shape and it spreads out to fill any space.
This is how a gas behaves.
So, the air you breathe is a gas. ✅
Example 4:
When you put a toy car (a solid) on the floor, it keeps its shape. If you pour juice (a liquid) into a cup, what happens to its shape?
A) It keeps its own shape.
B) It takes the shape of the cup.
C) It disappears.
Solution:
Let's compare solids and liquids!
A solid, like the toy car, has its own fixed shape.
A liquid, like juice, does not have its own fixed shape. It flows and will always take the shape of the container it is in.
So, when you pour juice into a cup, B) It takes the shape of the cup. ✅
Example 5:
Imagine you have an ice cube 🧊 in your hand. After a few minutes, what state of matter will the ice cube become? Why?
Solution:
Let's think about what happens to an ice cube when it gets warm!
An ice cube is solid water.
When you hold it, the warmth from your hand makes the ice cube get warmer.
When ice gets warm enough, it changes from a solid to a liquid. This change is called melting.
So, the ice cube will become liquid water because it melts from the warmth. ✅
Example 6:
On a sunny day, you see a puddle of water 💧 on the sidewalk. After a few hours, the puddle is gone! Where did the water go, and what state of matter did it become?
Solution:
Let's follow the water in the puddle!
The puddle is made of liquid water.
The sun's heat makes the water warm up.
When liquid water gets warm enough, it can turn into an invisible gas called water vapor and rise into the air. This process is called evaporation.
So, the water went into the air as a gas (water vapor) because it evaporated. ✅
Example 7:
When you blow into a balloon 🎈, it gets bigger. What does this tell you about the air (a gas) you are blowing into it?
A) Air is very heavy.
B) Air takes up space.
C) Air is a solid.
Solution:
Let's think about what happens when you blow up a balloon!
When you blow into a balloon, you are putting more air inside it.
The balloon gets bigger because the air needs somewhere to go.
This shows that even though we can't always see it, air (a gas) takes up space.
So, the correct answer is B) Air takes up space. ✅
Example 8:
You are making soup 🍲 on the stove. You see steam rising from the pot. What state of matter is the soup in the pot, and what state of matter is the steam?
Solution:
Let's identify the states of matter in this everyday situation!
The soup in the pot is something you can stir and pour, so it is a liquid.
When the soup gets very hot, some of the water in it turns into steam. Steam is hot water vapor, which is a gas.
So, the soup in the pot is a liquid, and the steam is a gas. ✅