Quarter 1-2 Science

A student places a cup of cold water on a counter in a hot room.   After a short time, the student notices that the water in the cup is no longer cold.  Which best explains why the water in the cup is no longer cold?

• The coldness of the water transferred to the air, making the water in the cup warmer.
• The coldness of the water was conducted to the cup, making the water in the cup warmer.
• The heat from the air transferred to the water in the cup, making the water in the cup warmer.
• The heat from the air caused the cold water in the cup to condense, making the water warmer.

On very hot days, animals will often find a patch of dirt on the ground to lay in to keep cool.   Which best explains how laying on the ground and dirt keeps the animal cool?

• The coolness from the ground is transferred to the animal's body, lowering the animal's body temperature.
• Dirt on the ground protects the animal from the heat in the air, lowering the animal's body temperature.
• The animal's body temperature does not change, but the dirt makes the animal feel cooler.
• Heat from the animals body is transferred to the ground, lowering the animal's body temperature.

Mrs. Warren’s class is learning about heat transfer. Her class observes a pot of boiling water and describes the process. The students note that as the water at the bottom heats up, it rises. The cool water at the top falls, and the cycle continues. Which best describes the process the students are observing?

• conduction
• radiation
• convection
• transformation

A girl is heating soup. As she stirs the soup with a metal spoon, the spoon becomes hot and burns her hand. Why does the spoon burn the girl’s hand?

• The heat from the soup is radiated through the spoon.
• The heat from the soup is conducted through the spoon.
• The warmth of the girl’s hand is radiated into the spoon.
• The warmth of the girl’s hand is conducted into the spoon.

Which material would be the best choice for a cooking tool to be used when grilling food over a fire?

• plastic
• metal
• paper
• wood

Emma fills a wooden box and a plastic container of the same size and thickness with equal amounts of ice. She wants to determine which material will keep the ice frozen the longest. Which best explains the results of her experiment?

• The plastic container works best because plastic is a good insulator from heat.
• The plastic container works best because plastic is a good conductor of heat.
• The wooden box works best because wood is a good insulator from heat.
• The wooden box works best because wood is a good conductor of heat.

Alex is using a plastic material that resists heating up. Which is Alex most likely creating?

• a handle for a pan, because it will keep a person’s hand from burning
• a stove, because it uses materials that need to heat to high temperatures
• a light bulb, because it uses electricity to heat the inside wire and create light
• a toaster, because the coils inside a toaster need to radiate heat to warm the food

When water freezes, a physical change has occurred. Which is most likely a property of the material formed by this physical change?

• It will never be a liquid again.
• It will be in the form of a gas.
• It can be changed back into its original form.
• It can take the form of any container it is put in.

Which will increase transpiration?

• increase in evaporation
• decrease in evaporation
• increase in the sun’s energy
• decrease in the sun’s energy

Which most accurately explains the way clouds form?

• Warm water vapor hits warm air, changing the gas into a liquid, and forming a cloud.
• Warm water vapor hits cold air, changing the gas into a liquid, and forming a cloud.
• Warm water vapor hits warm air, changing the gas into a solid, and forming a cloud.
• Warm water vapor hits cold air, changing the gas into a solid, and forming a cloud.