Energy
Kinetic energy is the energy of _____.
What is motion?
Most materials ____ when they are heated.
What is expand?
Ironing clothes is an example of what kind of heat transfer?
What is conduction?
Specific heat is the amount of energy needed to raise 1 gram of a substance by ____.
What is 1 degree celcius
Which state of matter has particles that vibrate in place but maintain a fixed shape?
What is a solid?
Adding thermal energy to a cup of water may cause the particles to _____.
What is move faster?
When a substance is cooled it usually ___
What is contracts?
A pot of water is put on a stove, the water at the surface gets hot primarily by ____
T/F
Different substances have different specific heats
What is true?
Which state of matter has no definite shape but has a definite volume?
What is liquid?
The measure of the average kinetic energy of the particles of a substance is its _____.
What is temperature?
During a hot shower, water vapor fogs up the cooler mirror when it turns to water. This is an example of _____.
What is condensation?
You grab a bottle of water out of the refrigerator. Your hand gets cold because of _____.
What is conduction?
Compared to water, most metals have ___ specific heats.
What is low?
Which state of matter has particles that move the fastest and are spread the furthest apart?
What is gas?
The average kinetic energy of the particles ____ as the temperature increases.
What is increases?
Consider an iceberg and a hot cup of tea. Compare the two in terms of temperature and thermal energy.
The tea has a higher temperature, but the iceberg has more thermal energy, because it has so many more particles than the tea.
What is the primary source of energy for most ecosystems on Earth?
What is The Sun?
What happens to the temperature of water in a pot when you first start heating it?
What is it changes temperature slowly?
What process describes the change of state from a liquid directly to a gas?
What is vaporization?
If the same quantity of thermal energy is added to two different substances with the same mass, the substance with the lower specific heat will experience less of a temperature change.
T/F
What is False?
Give one example each of a thermal conductor and a thermal insulator.
Conductor: Metals
Insulator: Wood, wool
Explain how heat is transferred between a hot and a cold object by conduction.
The particles of the hotter object transfer kinetic energy to the particles of the cooler object as they collide. The hot object gets cooler and the cool object gets warmer.
A student jumped in the ocean on a hot summer day and was surprised that the water was very cold. Use your knowledge of specific heat to explain this.
Water has a high specific heat so it stays cool even on a hot summer day.
What happens to the particles in a solid when it is heated and changes to a liquid?
What is move faster and spread farther apart?