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What are the three states of matter we are learning about?
Solids, Liquids, Gasses
What happens to water when it freezes?
It turns to ice.
What do you call it when water vapor turns into tiny drops of water?
Condensation.
Imagine you could travel to a planet made entirely of gas. Could you walk on its surface? Why or why not?
No, the particles (atoms) are too far apart and would move out of the way, under your weight.
Name 7 things that need electricity to work.
Lots.
What state of matter is ice?
Solid
What happens to a puddle of water left outside on a hot day?
It evaporates.
What happens to a liquid when you pour it into a different shaped container?
It takes the shape of the container
Can you think of an everyday object that contains all three states of matter at once?
A plant, a car.
Why shouldn't you put your fingers in electrical sockets?
You will get electrocuted as people conduct electricity.
Which state of matter has a definite shape and volume?
Solids
Using scientific terminology (words), what happens when you breathe onto a window?
Water vapor from your breath condenses into tiny droplets of water.
Why can sand be poured, even though it is a solid?
The solid is in such tiny pieces that it acts similar to a liquid in some ways.
If you put a drop of water in space, what would happen to it? Would it freeze, boil, or something else?
In space, there is no air pressure and not much heat, so the water would actually boil away! Even though it might seem cold in space, boiling happens when particles gain energy and escape, and with no air pressure to hold them together, the water molecules would easily float away as gas.
Think about a switch on a toy. How does it work?
It breaks the circuit so electricity can't travel through.
Why does a balloon filled with helium float in the air?
Helium is lighter than air so makes the balloon float.
What would happen to a bowl of jelly left in a warm room all day?
It would melt and turn to liquid.
If you open a bottle of perfume, why can you smell it all around the room?
The particles are very light and float in the air, spreading around the room.
Can a solid turn directly into a gas?
Yes. It's called sublimation and requires certain pressure or temperature. An example is dry ice.
How is sound created? Talk about particles.
The particles of an object vibrate which vibrates the air making sound waves.
Air has no definite shape. The air fills the whole tyre but as the particles are spread out they have room to squash together more, making tyres bouncier.
In detail, explain how the arrangement of particles in a solid changes when it melts.
Some bonds between the particles break allowing them to move more freely.
How does the spacing between particles change when a liquid boils?
The particles spread out even more and turn into a gas. This is called vaporization or evaporation.
A bouncy ball and a rock are both solids. Their atoms are close together. Why is one bouncy and the other isn't?
Think of it like joining arms. If you all join arms to make a solid you are stuck close together with little movement. If you instead all held rubber bands you have more springiness.
Why does sound travel faster in water than in air?
The particles are closer together in a liquid so the vibrations travel quicker.