How does sitting in front of a fire most likely keep a person warm?
radiation
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15
Which explains how most metals react to being heated?
Expand
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15
What is the original source of most of the energy that people use?
Sun
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15
A teacher adds 2 g of chalk to 25 g of vinegar in a tightly sealed jar. The chalk and vinegar react, and gas bubbles form. What is the total mass of the jarâs contents after the reaction takes place? A. 23 g B. 25 g C. 27 g D. 50 g
C. 27 g
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15
Why are pots used for cooking made of metal?
Metal is a good conductor
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15
Khalia had a cup of ice with a mass of 1,000 kg. After the ice melted, which is most likely the mass of the cup of water? A. 250 kg B. 500 kg C. 1,000 kg
C. 1,000 kg
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15
Ivy mixed 30 g of hot chocolate mix with 200 g of hot milk. She then added 5 marshmallows with a mass of 8 g each. Which best describes the mass of her hot chocolate? A. 235 grams B. 238 grams C. 270 grams
C. 270 grams
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15
Max adds 250 g water and 250 g rice to a pot on a stove and covers the pot with a lid. The water boils and is absorbed by the rice. How much do the contents of the pot weigh after the rice finishes cooking? A. 250 g B. 400 g C. 500g D. 600g
C. 500g
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15
Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?
Chemical
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15
Which type of change occurs when the size, shape, appearance, or volume of a substance is changed without changing its composition?
Physical
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15
Jacob cuts a one-pound block of cheese into four slices. What is the weight of the cheese after it is sliced? A. 1/4 pound B. 1 pound C. 2 pounds D. 4 pounds
B. 1 pound
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15
Bill stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface. Which process causes this difference in temperature?
Convection
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15
Which will most likely form during the condensation process?