Conduction, Radiation, or Convection
Jane put a pot of water on the stove. When the water heated up, she put several drops of food coloring at the bottom of the pan. She noticed the food coloring rose to the top and then fell in a circular motion. What is this type of heat transfer called?
Convection
How does thermal heat transfer (hot to cold or cold to hot)?
Hot to cold
If 10 grams of water are added to 5 grams of salt, how much salt water will be made?
15 g
Which color pot would heat up fastest on a stove?
A. black
B. white
C. green
D. yellow
A. Black
Chemical
Joe was stirring his pot of soup when the doorbell rang. He left the metal spoon in the pot. When he returned, he found that the spoon was very hot. Which type of heat transfer explains what happened.
Conduction
Which statement best explains why the red liquid inside a thermometer rises and falls with the temperature?
A. Liquid is absorbed when placed in water
B. The liquid expands and contracts according to the temperature
C. Liquid can not expand or contract. It works through mysterious forces.
B. The liquid expands or contracts according to the temperature
Joe wants a salad. He mixes together 20 ounces of torn lettuce, 3 ounces of tomatoes, ounce of cheese shredded, and 3 ounces of carrots cut into 18 pieces. What is the weight of the salad after Joe combines all the ingredients in a bowl?
27 ounces
Why do would someone want to wear dark colors on a cold day?
Dark colors absorb energy from the sun better.
Physical Change
Which type of heat transfer best explains why the sand at the beach is hot?
Radiation
What would most likely be the result of putting a cold glass on a hot stove?
It would expand and crack
True or False: Matter cannot be created or destroyed, it only changes form.
True
True or False: Heating affects different materials at different ways.
True
Chemical Change
Which is most responsible for the uneven heating of air in the atmosphere?
A. Conduction
B. Convection
C. Radiation
Convection
A balloon is placed over the opening of an empty bottle and placed in a container of hot water. Why does the balloon fill with air?
Gas expands and contracts according to the temperature.
Lamonte is doing a science experiment. They have a jar full of 10 grams of sugar. They add 5 grams of a mystery chemical. When the two are mixed, they create a new solid and no gases. The container is very hot. How many grams of the new substance should be in the jar at the end of the experiment?
15 g
Julia wants to make a solar oven. She is deciding which material to line the inside of the box in order to cook the food the fastest. Which material should she choose?
A. aluminum foil
B. paper
C. plastic wrap
D. plywood
A. Aluminum foil. Metal is an excellent conductor of heat.
Chemical
People sitting around a campfire are able to feel the heat from the fire. How are the people able to feel the heat from the fire without touching the fire?
The heat from the fire radiates to the people
Watch the following experiment:
Ball and Ring Experiment (be sure the sound is off)
Why doesn't the ball fit through the ring after it is heated?
The ball expands from the heat.
Which of these terms is a measurement of how much matter is in an object?
A. Mass
B. Weight
C. Volume
D. Size
A. Mass
A student notices that an inflated balloon gets larger when it is warmed by a lamp. What explains the mass of the balloon as a result of this change?
The mass stays the same.
Wood burning in a fire
Chemical Change