Ice Crystals
When you take water and place it in a very cold freezer, it changes into a solid. What is this solid called?
Ice
Water can exist in different forms. When water is frozen and keeps its shape, what state of matter is it in?
Solid
If you leave an ice cube outside on a hot day and another one inside a freezer, which place will make the ice melt faster?
Outside / the warm place
Dry ice looks like regular ice, but touching it can hurt your skin because it is extremely what?
Cold
Even though ice often looks white, scientists say pure ice without air bubbles is actually what color?
Clear
Ice crystals begin to form when liquid water loses heat and becomes very what?
Cold
When water is at room temperature and can flow and take the shape of its container, what state of matter is it in?
Liquid
Scientists use a special tool to measure how hot or cold something is. What is this tool called?
Thermometer
Even though it looks like ice, dry ice is actually frozen carbon dioxide. Carbon dioxide is a type of what?
Gas
When you drop an ice cube into a glass of water, it stays on top instead of sinking. What does ice do in water?
Float
When scientists look closely at ice crystals and snowflakes, they notice they usually have how many sides?
Six
When water is heated and turns into steam that spreads out in the air, what state of matter is it in?
Gas
When water gets colder and colder and finally freezes, what does it become?
Ice
When dry ice is placed in warm water, a thick white cloud forms and spills over the bowl. What is this cloud called?
Fog
Ice floats because it is less dense than liquid water. What does “less dense” mean in simple terms?
It is lighter for its size
High up in the sky, tiny drops of water freeze together to form ice crystals. Where does this happen?
In the Clouds
When ice is left out on a warm day and turns into water, what change of state is happening?
Melting
As temperature goes down, the tiny particles in water move more slowly or more quickly?
More slowly
The fog from dry ice happens because the very cold gas cools the air and turns water vapor into tiny droplets. What gas is causing this effect?
Carbon Dioxide
At home, people use a machine that cools water until ice crystals form. What is this machine called?
A freezer
When many tiny ice crystals join together and fall from the sky, what do we call them?
Snowflakes
When a solid changes directly into a gas without becoming a liquid first, what special science word describes this change?
Sublimation
When heat is added to ice, it gives the particles more energy. What change does this extra energy cause?
The ice melts
When dry ice is placed in warm water, it disappears quickly and makes thick fog. Explain why warm water makes dry ice change faster than cold water.
Warm water gives dry ice more energy, so it turns into gas faster.
Scientists say ice floats in water because it is less dense. If ice sank instead, what would happen to lakes and fish during winter?
Lakes could freeze from the bottom up, and fish might not survive.