Safari Tour: States of Matter Changes Quiz

When ice is heated, it becomes (a)  

• water
• steam

• ice

• snow

Answer explanation

Think of ice like tiny frozen blocks. When you heat the ice, the blocks start to wiggle and move. When they wiggle enough, the ice turns into water!

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(a)   is an example of condensation.

• Ice melting into water.
• Water vapor turning into liquid water
• Water boiling and turning into steam
• Water freezing into ice.

Answer explanation

When the warm, invisible water vapor hits the cold glass, it cools down and turns into tiny drops of liquid water. This is called condensation. So, condensation is when water vapor in the air turns into liquid water, just like how the drops form on the outside of your cold glass!

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Noah left a glass of water outside on a hot day. What change might he observe?

• The water will freeze.

• The water will evaporate and become water vapor.

• The water will turn into ice.

• The water will remain unchanged.

Answer explanation

This process is called evaporation. So, when the sun heats up water, like from a puddle or a lake, the water turns into vapor and floats up into the air, just like magic!

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Why does condensation form on the outside of a cold glass?

• The glass is absorbing water from the air.

• The cold temperature of the glass causes water vapor in the air to cool and change into liquid water.

• The glass is leaking water.

• The glass is melting.

Answer explanation

Great question! When you have a cold glass, the air around it has tiny bits of water in it, even though you can't see it. When the warm air touches the cold glass, it cools down. The cold glass makes the tiny water bits in the air stick together and form little drops of water. That’s what you see on the outside of the glass!

So, condensation happens because the cold glass makes the water in the air turn back into liquid and form drops.

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Nora and Lily were conducting a science experiment. They placed a metal spoon in a pot of boiling water. What do you think happened to the spoon? (a)  

• The spoon got hot
• The spoon melted

• The spoon stayed cold

• The spoon turned black

Answer explanation

When you put a metal spoon in hot water, the spoon gets hot because metal can pass heat really well. The hot water makes the spoon warm, and then the spoon makes the part you hold hot too! That's why you should be careful when you touch it!

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Explain why ice cream melts on a hot day.

• The heat from the sun causes the ice cream to absorb energy, changing it from a solid to a liquid.

• The ice cream is made of water, which naturally turns into liquid.

• The air is too cold for the ice cream to stay solid.

• The ice cream is not real.

Answer explanation

When the sun or the warm air touches the ice cream, it starts to melt, turning from a solid into a liquid. This happens because the heat makes the ice cream's molecules move around faster, causing it to lose its shape and become a liquid. That’s why you need to eat it quickly before it melts!

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Design an experiment to show how water can change from a liquid to a gas.

• Place a cup of water in the freezer and observe.

• Boil a pot of water and observe the steam rising.

• Put a cup of water in the refrigerator and observe.

• Leave a cup of water in a dark room and observe.

Answer explanation

Boiling water in a pot is a good way to design an experiment because it’s easy to see what’s happening. When the water boils, you can watch it turn into steam and see bubbles. This helps you understand how heat works and how things change when they get hot.

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Zoe and Luna are on a mission to explore the wonders of freezing! How would you help them demonstrate the process of freezing using water?

• Heat the water until it evaporates.

• Place the water in a freezer and observe it turning into ice.

• Leave the water in a warm room.

• Shake the water vigorously.

Answer explanation

To demonstrate freezing with water, you can fill a small cup with water and put it in the freezer. After a few hours, the water will turn into ice!

This happens because the cold in the freezer makes the water freeze, turning it from liquid into solid ice. You can even check it after a little while and see the change from water to ice!

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Imagine you're in a science lab with Henry and Harper, and you see a pot of water boiling on the stove. What magical transformation is happening to the water?

• The water is turning into ice.

• The heat causes the water molecules to move faster and spread apart, changing from liquid to gas.

• The water is absorbing cold air.

• The water is becoming solid.

Answer explanation

When you see a pot of water boiling on the stove, it means the water is getting really hot! The heat from the stove makes the water molecules move faster and faster. When the water gets hot enough, it starts to turn into steam, which you can see as bubbles and vapor rising from the pot.

The bubbles are made of water turning into gas because of the heat, and that’s what we call boiling. So, the water is changing from liquid to gas because of the heat from the stove!

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Arjun and Elijah are curious about how condensation works. Can you help them plan a fun activity to observe condensation in action?

• Place a cold glass of water outside on a hot day and watch Arjun and Elijah observe the droplets forming on the outside of the glass.

• Boil water and watch it turn into steam with Arjun and Elijah.

• Freeze water and watch it turn into ice with Arjun and Elijah.

• Leave water in a dark room and have Arjun and Elijah observe.

Answer explanation

This is condensation—when water vapor in the air turns into liquid water because it cools down! So, the cold glass helps the warm air turn into water drops that you can see on the glass.

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