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Science Unit F Study Guide – Answer Key
A student places a cup of ice in the sun. How does putting it in the sun change its temperature and what will happen?
If a student places a cup of ice in the sun, heat energy will cause the temperature of the cup to increase and the ice will start to melt.
How would you describe a circuit that has a bulb that is lit when the switch is closed?
When the switch is closed, the circuit is closed. The path is complete and current flows causing the bulb to light up.
What form of energy is lightning?
Lightning is a form of electrical energy.
A container of water measures 20 degrees Celsius. A student places the water on a stove and adds heat for five minutes. What will happen to the temperature after heat is added?
The temperature will increase after heat is added to the water.
What is the rule about magnets and what they attract?
Magnets have 2 poles ~ north and south. Opposite poles attract each other.
What form of energy changes into the heat energy used by a toaster to brown bread?
Electricity changes into the heat energy used by a toaster to brown bread.
Where is the pull of a magnet strongest?
The pull of a magnet is strongest at its poles.
Which form of energy would be used to light a bulb in a simple circuit?
Electricity could be used to light a bulb in a simple circuit.
What are insulators?
Insulators are materials through which electricity does not flow.
What are examples of insulators?
Some examples of insulators are wood, air and rubber.
What are conductors?
Conductors are materials through which electricity flows easily.
What are some examples of conductors?
Some examples of conductors are metal and water.
What does every magnet have?
Every magnet has 2 poles – one north and one south.
What component, when added to the simple circuit, increases the brightness of a bulb?
When a battery is added to the simple circuit, the brightness of a bulb is increased.
What are some objects that will heat up quickly when heat is added to them?
Objects that will heat up quickly when heat is added to them are things made of metal.
What is something that increases the strength of an electromagnet
Something that would increase the strength of an electromagnet is wrapping wire around a steel nail.
A student puts a light bulb in a lamp and turns the lamp on. After it is on for awhile, he touches the bulb. How has energy changed the temperature of the bulb?
The energy has caused the temperature of the bulb to increase.
What is one way that you can describe a magnetic field?
A magnetic field is three-dimensional.
What form of energy increases when you rub your hands together quickly?
Heat increases when you rub your hands together quickly.
What form(s) of energy is given off by a television set when it is turned on?
The forms of energy given off by a television set when it is turned on are light, sound and heat.