Why does this make your hands feel warm?
Your hands release heat energy.
The heat from the campfire is transferred to your hands.
When a liquid turns into a gas, it's called:
Melting.
Evaporation/vaporization.
Condensation.
Freezing.
What happens to the energy of particles when a substance changes from a gas to a liquid?
It decreases a little.
It stays the same.
Why does a metal spoon feel colder to touch than a wooden spoon at the same room temperature?
Because wood is hotter than metal.
Because they have different capacities of transporting heat.
How does increasing the temperature of a substance affect the speed of its particles?
Increasing temperature makes particles move slower
Increasing temperature makes particles move faster.
How does a fan cool you down on a hot day?
It helps you to lose heat.
It accelerates the freezing process.
This thermogram shows that:
The forehead and chest are the hottest spots on this face.
The forehead and nose are the hottest spots on this face.
This thermogram shows that:
The nose is the hottest spot on this face.
The nose is the coldest spot on this face.
Select the difference between condensation and evaporation.
Condensation turns gas into liquids, not liquids into gas.
Condensation happens at 120°C, evaporation at 100° C.
Do particles move differently in different states of matter?
They move slower in solids than gases.
They move at a constant speed.
Describe the process of melting and what happens to particles when a solid becomes a liquid.
A solid turning into a liquid, and particles gain energy.
It's turning a gas into a solid. Particles slow down.
When heat is transferred through direct contact of solids, it is:
Conduction.
Radiation.
Convection.
Explain why gases are more spread out and can fill a container of any shape.
Gases have fast-moving particles that can spread out
Gases are sticky and cling to container walls.
When a solid turns into a liquid, it's called:
Freezing.
Condensation.
Evaporation.
Melting.
Can you explain why a balloon filled with air expands when placed in a hot environment?
The air particles in the balloon gain energy and move faster
The air particles in the balloon lose energy.
When heat is transffered through waves, meaning no direct contact, it is:
Radiation.
Convection.
Conduction.
Water going from liquid to gas represents:
A phase change.
Lower temperature.
When heat is transffered through gas or liquid particles, it is:
Conduction.
Convection.
Radiation.
The temperature where, in theory, all particles stop moving is called:
Freezing point.
Absolute Zero.
What is the difference between a physical change and a chemical change in terms of particles?
Particles stay the same but may change how they are arrange
Particles rearrange to form new substances.
This thermogram shows that:
The chest is the coldest spot on this face.
The nose is the coldest spot on this face.
What is temperature, and how does it affect the movement of particles?
Temperature is a measure of the average speed of particles.
Temperature is a measure of the number of particles.
A puddle disappears on a sunny day because of
Evaporation.
Freezing.
How does the movement of particles differ in solids, liquids, and gases?What is kinetic energy, and how is it related to the movement of particles?
It's the energy of motion and relates to how fast they move.
It's the measure of the number of particles in a substance.
How does the arrangement of particles differ in a gas compared to a solid or a liquid?
Particles in a gas are closely packed together.
Particles in a gas are spread out and move freely.
Higher temperature leads to higher kinetic energy.
True.
False.
When a liquid turns into a solid, it's called:
Freezing.
Freezing.
Melting.
Evaporation.
How does water change states when it boils? What happens to its particles?
They gain energy during boiling, and turn into a gas.
They slow down during boiling, and turn into a solid.