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elements in carbon family have four valence electrons
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if the elements are in the same family , then the elements will share the same number of valence electrons
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the chemical symbol for potassium is k
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sodium and potassium belong to alkali metals , group 1 on the periodic table
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the chemical symbol for sodium is na
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mercury is liquid at room temperature
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metals are usually solid at room temperature
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mercury is a kind of metal
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argon is a kind of element
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argon is a kind of nonmetal
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nonmetals usually have lower conductivity
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boiling means matter / a substance changes from a liquid into a gas by increasing heat energy
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water is in the liquid state , called liquid water , for temperatures between 0 c and 100 c
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water is in the gas state , called water vapor / steam, for temperatures above 100 c
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water is a kind of substance
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water is a kind of substance
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boiling means matter / a substance changes from a liquid into a gas by increasing heat energy
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the boiling point of water is 100c
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water is a kind of liquid
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the highest temperature a liquid can reach is it's boiling point
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if a thermal conductor is exposed to a source of heat then that conductor may become hot
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the pot is exposed to a stove
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metal is a thermal energy conductor
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a pot is made of metal for cooking
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a pot is a kind of object
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heating means adding heat
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a pot contains water
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a stove is a source of heat
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boiling happens when liquids are heated above their boiling point
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a pot is a kind of container
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water is a kind of liquid at room temperature
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if a container contains something then that container touches that something
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if an object is hot and it touches something, that something will increase temperature by absorbing heat energy from the object
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boiling means matter / a substance changes from a liquid into a gas by increasing heat energy
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water is a kind of substance
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water is in a boiling process
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as the temperature of a substance increases , the molecules in that substance will move faster and farther apart
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temperature is a measure of heat energy
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boiling means a substance changes from a liquid into a gas by increasing heat energy
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boiling happens when liquids are heated above their boiling point
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a liquid is a kind of substance
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evaporating is a kind of phase change
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temperature is a measure of heat energy
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temperature changing can cause phase changes
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condensing is a kind of phase change
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water is in the gas state , called water vapor
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condensing means a substance changes from a gas into a liquid by decreasing heat energy
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water is a kind of substance
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dew is formed when water vapor condenses over night
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water is in the liquid state , called liquid water
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water is a kind of substance
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condensing means matter / a substance changes from a gas into a liquid by decreasing heat energy
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water is in the gas state , called water vapor / steam
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condensation is a kind of process
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water is a kind of substance
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condensation is when a substance changes from a gas into a liquid by decreasing heat energy
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as the temperature of a substance decreases , the molecules in that substance will move slower and closer together
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the water changes from steam to liquid
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steam is a kind of gas
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the water is absorbing sunlight
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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if a substance absorbs solar energy then that substance will increase in temperature
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temperature is a measure of heat energy
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water is a kind of substance
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boiling causes the volume of a liquid to decrease
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the water was boiled
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water is a kind of liquid at room temperature
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temperature is a measure of heat energy
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if a substance absorbs solar energy then that substance will increase in temperature
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if something is in the sunlight then that something will absorb solar energy
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a puddle is a kind of body of water
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a puddle is in the sunlight
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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water is a kind of substance
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if something is in the sunlight then that something will absorb solar energy
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a bucket of water is in the sunlight
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if a substance absorbs solar energy then that substance will increase in temperature
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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water is a kind of substance
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as the amount of heat energy of a substance increases , the amount of kinetic energy will increase
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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the kinetic energy of water molecules are increasing
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water is a kind of liquid
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a wet towel exists
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a towel is a kind of object
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heating the wet towel will also heat the things it contains
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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absorbing sunlight causes objects to heat
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a wet towel is a kind of object
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drying means the amount of liquid decreases
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a wet object contains water
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evaporation causes amount of liquid to decrease
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heating means increasing heat energy
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the wet towel is in the sun
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if an object is in the sunlight then that object will absorb solar energy
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evaporation means a substance changes from a liquid into a gas by increasing heat energy
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temperature is a measure of heat energy
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if something is outside during the day then that something will receive sunlight
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puddles of water are outside during the day
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if something receives sunlight, it will increase in temperature
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