New Substances
Which is the best example of a new substance forming?
A lighting a match
B cutting a piece of paper
C popping a balloon
D hitting a nail with a hammer
A lighting a match
Which one is a clue that a chemical change is happening?
A. The temperature in a beaker decreased when you mix two liquids in it.
B. A liquid changes to a gas when it reaches a high temperature
C. A sheet of paper changes shape as you cut it with scissors.
D. A car door feels hot if you touch it on a sunny afternoon.
A. The temperature in a beaker decreased when you mix two liquids in it.
Which is the best example of the transfer of heat by radiation?
A water boiling
B ice melting
C a hot air balloon rising
D a lightbulb glowing
D a lightbulb glowing
Four boys are drinking hot chocolate. Their cups are made of different materials. Which cup will be hottest to touch?
A. Glass cup
B. Metal cup
C. Paper cup
D. Plastic cup
B. Metal cup
Students observed a piece of iron change from shiny to rusty. What caused this change?
A a chemical reaction
B a heat reaction
C a cold reaction
D a physical reaction
A a chemical reaction
Jason fills a glass container completely with water and screws the lid on tightly. He places the container in a freezer. Which will most likely result?
A The container will prevent the water from freezing.
B The water will freeze and take up less space in the container.
C The water in the container will expand when it freezes and cause the container to crack.
D The container will absorb heat from the water, causing it to crack.
C The water in the container will expand when it freezes and cause the container to crack.
Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?
A Heat energy transfers from the metal spoon to the hot liquid.
B Heat energy transfers from the hot tea to the spoon.
C Heat energy transfers from the air to the hot liquid, and then to the spoon.
D Heat energy transfers from the hot liquid to the cup, and then to the spoon.
B Heat energy transfers from the hot tea to the spoon.
Which material is best used to keep cold drinks from getting warm too quickly?
A glass, because it is a good conductor of heat
B foam, because it is a poor conductor of heat
C metal, because it radiates heat
D paper, because it conducts heat
B foam, because it is a poor conductor of heat
Two liquids are poured together, and a solid substance forms with no liquid remaining. Liquid 1 has a mass of 200 grams, and liquid 2 has a mass of 100 grams. What would be the total mass of the solid substance formed?
A 100 grams
B 150 grams
C 250 grams
D 300 grams
D 300 grams
What happens to metal railroad tracks during the heat of a summer day?
A decrease in weight
B increase in weight
C decrease in length
D increase in length
D increase in length
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?
A The heat from the fire travels through the ground and heats the ground around the people.
B The heat from the fire is conducted through air molecules to the people.
C The heat from the fire rises in the air and then settles around the people.
D The heat from the fire radiates from the fire to the people.
D The heat from the fire radiates from the fire to the people.
A student heats some water in a pan on a stove. The handle of the pan gets hot. Which is MOST LIKELY true about the handle?
A. The handle is made of wood
B. The handle is made of plastic
C. The handle is an insulator
D. The handle is a conductor
D. The handle is a conductor
Which describes a change in which one or more new types of matter form?
A. Heat transfer
B. Chemical change
C. Change of state
D. Physical change
B. Chemical change
What will most likely happen when warm water is added to a bowl of cold water?
A. The colder water particles will lose thermal energy, and the warmer ones will gain thermal energy.
B. The warmer and colder water particles will both lose thermal energy.
C. The warmer and colder particles will both gain thermal energy.
D. The warmer water particles will lose thermal energy, and the cooler ones will gain thermal energy.
D. The warmer water particles will lose thermal energy, and the cooler ones will gain thermal energy.
Currents of warmer rising air and cooler sinking air transfer thermal energy throughout the air in a room. Which term describes this form of heat transfer?
A. Radiation
B. Convection
C. Conduction
D. Condensation
B. Convection
Jake is wearing gloves while he gets a hot pan out of the oven. Which best explains why Jake needs to wear gloves while he is carrying the hot pan?
A. The gloves protect his hands from convection heat in the hot pan.
B. The gloves protect his hands from heat that is radiated through the hot pan.
C. The gloves protect his hands from heat that is conducted through the hot pan.
D. The gloves protect his hands from heat that enters the pan from the surrounding air.
C. The gloves protect his hands from heat that is conducted through the hot pan.
The Walker family went on vacation and left 2.7 kilograms of milk in their refrigerator. The milk began to spoil, and there were lumps in it when the Walkers returned home. Which is most likely the mass of the spoiled milk?
A. 1.4 kg
B. 2.7 kg
C. 5.4 kg
D. 8.1 kg
B. 2.7 kg
Which material is a good conductor of heat?
A. Aluminum
B. Glass
C. Plastic
D.Wood
A. Aluminum
A lizard is basking in the sunlight. How does the sun transfer energy to the lizard?
A. Absorption
B. Conduction
C. Convection
D. Radiation
D. Radiation
Which best explains how ice melts in a person’s hand?
A. The heat from a person’s hand transfers by radiation to the ice, causing it to melt.
B. The heat from a person’s hand transfers by conduction to the ice, causing it to melt.
C. The cool temperature of the ice transfers by radiation to a person’s hand, cooling it off.
D. The cool temperature of the ice transfers by conduction to a person’s hand, cooling it off.
B. The heat from a person’s hand transfers by conduction to the ice, causing it to melt.