Science Physical Property

What happens to water molecules when a large quantity of thermal energy is added to water in the liquid state?

• The more thermal energy added, the greater the attraction between molecules.

• The molecules gain kinetic energy, more farther apart, and become a gas.

• The water molecules become packed closer together, and their temperature increases.

• Each molecule gives up kinetic energy and eventually stops moving.

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Anything with both volume and mass

• Matter

• Molecule

• Atom

• Substance

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How many protons are there in Magnesium?

• 24

• 12

• 24.305

• 0

Mary and Alex want to learn more about salty ocean water. The two students perform a lab to determine the density of saltwater which represents an ocean versus freshwater which represents a lake. Which factor in their experiment affects the density of the water?

• type of eggs

• amount of salt

• size of beakers

• amount of water

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NGSS.MS-PS1-2

During an experiment, you were instructed to equally heat a sample of soil and a sample of water with heat lamps, and then measure the temperature of each sample once per minute, for eight minutes. Suppose that the experiment yielded the results shown in the table below. 

Which of the following predictions is best supported by the data?

• The temperatures of the soil and the water would rise at the same average rate because the same light is being used to heat it up.

• The temperature of the water would rise at a faster average rate than the average rate that the temperature of the soil would rise because water heats up faster than soil.

• The temperature of the soil would rise at a faster average rate than the average rate that the temperature of the water would rise because soil heats up faster than water.

•  The temperature of the soil would not rise at all over the next time period because the soil temperature has reached its maximum temperature.

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NGSS.MS-PS3-4

A student takes a bottle of cold water from the refrigerator and leaves it on the counter. Ten minutes later, the student noticed there is now water droplets on the outside of the bottle. Which scientific phenomenon explains the water on the outside of the bottle?

• Condensation because the temperature of the air nearest the bottle increased causing water droplets to form.

• Condensation, because the temperature of the air nearest the bottle decreased causing the water droplets to form.

• Evaporation, because the temperature of the air nearest the bottle increased causing the water droplets to form.

• Evaporation, because the temperature of the air nearest the bottle decreased causing the water droplets to form.

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Which two factors affect the density of ocean water?

• The amount of oxygen in the water and temperature

• The amount of oxygen in the water and salinity

• The temperature of the water and salinity

• The clarity and color of the water

Which physical property is determined by the salinity and temperature of ocean water?

• density

• mass

• volume

• weight

Using the image, which area on the image will have higher salinity and why?

• Area B, because it is closer to the poles with lower evaporation

• Area B, because it is closer to the poles with higher evaporation

• Area A, because it is closer to the equator with higher evaporation

• Area A, because it is closer to the equator with lower evaporation

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Using the models, which station was most of the energy from the light sources transferred to the sand?

• Station A, because the sand is receiving the most direct heat transfer by radiation.

• Station A, because the sand is receiving the most direct heat transfer by conduction.

• Station D, because the sand is receiving the most direct heat transfer by radiation.

• Station D, because the sand is receiving the most direct heat transfer by conduction

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