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transverse waves cause objects to move perpendicular to the direction of the wave & a particle is a kind of object | transverse waves cause particles to move perpendicular to the direction of the wave |
if two balanced forces act on an object in opposite directions then that object will remain stationary & if vehicle is parked then that vehicle is stationary & a vehicle is a kind of object | a parked vehicle is an example of two balanced forces acting on the vehicle |
a parked vehicle is an example of two balanced forces acting on the vehicle & a bus is a kind of vehicle | a parked bus is an example of two balanced forces acting on the bus |
wheels are a part of roller skates & a roller skate is a kind of vehicle | a roller skate is a kind of vehicle with wheels |
a roller skate is a kind of vehicle with wheels & a wheeled vehicle is a kind of vehicle with wheels | a roller skate is a kind of wheeled vehicle |
a roller skate is a kind of wheeled vehicle & a wheeled vehicle requires smooth surfaces | a roller skate requires smooth surfaces |
blacktop is made of asphalt concrete & asphalt has a smooth surface | a blacktop has a smooth surface |
a roller skate requires smooth surfaces & a blacktop has a smooth surface | a roller skate can be used on a blacktop surface |
skidding is when the tire of a vehicle slides on the road without rotating & if somethings slides on something else then that something is moving against that something else | skidding is when the tire of a vehicle moves against the road without rotating |
friction occurs when two object 's surfaces move against each other0 & a tire is a kind of object | a tire and a road are kinds of objects |
skidding is when the tire of a vehicle moves against the road without rotating & a tire and a road are kinds of objects & friction occurs when two object 's surfaces move against each other & a surface is a part of an object | skidding causes friction between the tire and the road |
skidding causes friction between the tire and the road & friction causes the temperature of an object to increase | friction causes the temperature of the tire to increase |
if the tire overheats, some chemical in the tire will vaporized & if the temperature of the tire keeps increasing, the tire will overheat | if the temperature of the tire keeps increasing, some chemical in the tire will be vaporized |
friction causes the temperature of the tire to increase & if the temperature of the tire keeps increasing, some chemical in the tire will be vaporized | friction causes some chemicals in the tire to vaporize |
friction occurs when two object 's surfaces move against each other1 & a chemical is a kind of substance | vaporizing a chemical causes smoke |
friction causes some chemicals in the tire to vaporize & vaporizing a chemical causes smoke | friction causes the tire to produce smoke |
friction occurs when two object 's surfaces move against each other & as roughness of a surface increases , friction will increase | as the roughness of a surface increases, friction on the moving object will increase |
as the roughness of a surface increases, friction on the moving object will increase & wood has a smooth surface & carpet has a rough surface | friction on the moving object increases when it is moving from the wood surface to the carpet surface |
friction on the moving object increases when it is moving from the wood surface to the carpet surface & as the friction increases, friction will decrease the speed of the object more | the speed of the moving object on the carpet will be decreased more than the moving objects on the wood surface |
ground is a kind of object & a wagon is a kind of object | a wagon and ground are kinds of objects |
a wagon and ground are kinds of objects & when the wagon is moving down the hill, it is moving against the ground & friction occurs when two object 's surfaces move against each other | friction occurs between the wagon and the ground |
friction occurs between the wagon and the ground & a wagon is a kind of object & friction causes the speed of an object to decrease | friction causes the speed of the wagon to decrease |
friction causes the speed of the wagon to decrease & if the speed of an object keeps decreasing, the object will come to stop & a wagon is a kind of object | friction causes the wagon to stop |
as the friction increases, the resistance on the object to move will increase & as roughness of a surface increases , friction will increase | as the roughness of a surface increases, the resistance on the object to move will increase |
as the roughness of a surface increases, the resistance on the object to move will increase & wood has a smooth surface & carpet has a rough surface | the resistance on the object to move on the carpet will be larger than on the wood |
the resistance on the object to move on the carpet will be larger than on the wood & a toy car is a kind of object | the resistance on the toy car object to move on the carpet is larger than on the wood |
the resistance on the toy car object to move on the carpet is larger than on the wood & as the resistance on the object to move increase, the object will move slower | the toy car will move slower on the carpet than on the wood |
a ramp is a kind of object & a block is a kind of object | a block and a ramp are kinds of objects |
a block and a ramp are kinds of objects & sliding is a kind of moving & a block is sliding down a ramp & friction occurs when two object 's surfaces move against each other | friction occurs between the block and the ramp |
friction occurs between the block and the ramp & friction causes the speed of an object to decrease & a block is a kind of object | friction causes the speed of the block to decrease |
pool balls are moving on the surface of the felt of the pool table & a pool table is a kind of object & a pool ball is a kind of object & friction occurs when two object 's surfaces move against each other | friction will occur between the pool ball and the felt of the pool table |
friction will occur between the pool ball and the felt of the pool table & friction causes the speed of an object to decrease & a pool ball is a kind of object | friction will cause the speed of the pool balls to decrease |
friction causes the temperature of an object to increase & heat means temperature increases | friction causes an object to heat |
friction causes an object to heat & oil is used to decrease the friction among parts in the car engine | oil can be used to decrease the heat among parts in the car engine produced by friction |
ramp is a kind of surface & as roughness of a surface increases , friction will increase | as roughness of the ramp increases, friction will increase |
as roughness of the ramp increases, friction will increase & putting a rough paper on the ramp will increase the roughness of the ramp | putting a rough paper on the ramp will increase the friciton of the ramp |
a ball is a kind of object & gravity pulls objects towards planets & gravity is a kind of force | gravity is the force that pulls the ball towards the planet |
gravity causes objects that have mass / substances to be pulled down / to fall on a planet & marble is a kind of object / material & gravity is a kind of force | gravity is the force that causes the marble to be pulled down on a planet |
a rock is a kind of object & gravity causes objects that have mass / substances to be pulled down / to fall on a planet & gravity is a kind of force | gravity is the force that causes rocks to be pulled down on the planet |
gravity causes objects that have mass / substances to be pulled down / to fall on a planet & gravity is a kind of force & a ball is a kind of object | gravity is the force that pulls the ball towards the planet |
gravity causes objects that have mass / substances to be pulled down / to fall on a planet & gravity is a kind of force & a ball is a kind of object | gravity is the force that pulls the ball towards the planet |
gravity causes objects that have mass / substances to be pulled down / to fall on a planet & gravity is a kind of force & marble is a kind of object / material | gravity is the force that causes the marble to be pulled down on a planet |
gravity is the force that causes the marble to be pulled down on a planet & sinking means moving down | gravity is the force that causes the marble to sink |
gravity is a kind of force & gravity causes objects that have mass / substances to be pulled down / to fall on a planet & a pencil is a kind of object | gravity is the force that causes the pencial to be pulled down on a planet |
a decrease is a kind of change & as the mass of an object decreases , the force of gravity on that object will decrease | as the mass of an object changes, the force of gravity on that object will change |
as the mass of an object changes, the force of gravity on that object will change & if something changes when something else changes, then that something depends on that something else | the force of gravity depends on the mass of an object |
the mass of an object causes the gravitational force exerted by that object & if something causes something else then that something else depends on that something | the gravitational force on an object depends on the mass of the object |
if something causes something else then that something else depends on that something & the mass of an object causes the gravitational force exerted by that object | the gravitational force on an object depends on the mass of the object |
flying an object requires lift to oppose the object 's weight & a glider is a kind of object | flying a glider requires lift to oppose the weight of the glider |
a cloth is a kind of object & a plastic strip is a kind of object | a cloth and a plastic strip are kinds of object |
a cloth and a plastic strip are kinds of object & there is a negatively-charged piece of cloth & there is a negatively-charged plastic strip & charge is a property of an object and includes ordered values of negatively-charged / neutral / positively-charged | the piece of cloth and plastic strip have the same charge of negative charge |
a cloth is a kind of object & a plastic strip is a kind of object | a cloth and a plastic strip are kinds of object |
the piece of cloth and plastic strip have the same charge of negative charge & a cloth and a plastic strip are kinds of object & if two objects have the same electrical charge then those two objects will repel each other when they are close to each other | the negatively-charged plastic strip and negatively-charged piece of cloth will repel each other |
if battery in an electromagnet is active then the nail in the electromagnet will become magnetic & the student connects the wire wrapping an iron nail to a battery | the iron nail will become magnetic |
the iron nail will become magnetic & a nail is a kind of object & magnetic attraction pulls two objects together | the iron nail will attract another iron nail because the iron nail is magnetic |
a soccer ball is a kind of ball & a ball is a kind of object | a soccer ball is a kind of object |
a soccer ball is a kind of object & a soccer player kicks a soccer ball & if an object is kicked then force is exerted on that object | a force is exerted on the soccer ball through the kick |
a soccer ball is a kind of ball & a ball is a kind of object | a soccer ball is a kind of object |
a force is exerted on the soccer ball through the kick & a soccer ball is a kind of object & as force exerted on an object increases , distance travelled will increase | the force of the kick can affect the distance travelled by the soccer ball |
a rock is a kind of object & a lever is used for lifting / moving heavy objects | a lever can be used for lifting a heavy rock |
pedalling a bicycle requires moving the pedals in a circular motion & pedals are part of a bicycle for pedalling | the pedals are the part of a bicycle that moves in circular motion |
an inclined plane increases the distance over which an object travels & an inclined plane decreases the force required to move an object to a different altitude | an inclined plane increases the distance the object travels and decrease the force needed to move the object |
speed is a measure of distance travelled by an object divided by time & race is when vehicles / humans compete in speed | the speed of the race is measured by dividing the distance travelled by time |
unbalanced force causes objects to move & a book is a kind of object & a book on the table starts to move horizontally | an unbalanced force is applied on the book |
40 m/s describes the speed of an object & north / northward is a kind of direction & velocity is a measure of a speed in a direction | 40 m/s north describes the velocity of an object |
humans have been on earth for 300000 years & insects have been on earth for 400000000 years & fish have been on earth for 419000000 years & reptiles have been on earth for 370000000 years | humans have been on earth for the shortest amount of time among insects, reptiles, and fish |
mammals give birth to live young & monkeys give birth to live young | a monkey is a kind of mammal |
mammals give birth to live young & bats give birth to live young | a bat is a kind of mammal |
mammals give birth to live young & mice give birth to live young | a mouse is a kind of mammal |
a monkey is a kind of mammal & a bat is a kind of mammal & a mouse is a kind of mammal | mouse, monkey, and bat are all mammals |
trout is a kind of fish & gills are a part of trout | gills are a part of a fish |
different kinds of trees keep or lose their leaves at different rates & the rate at which trees keep or lose their leaves is a characteristic of trees | the rate at which trees keep or lose their leaves is a characteristic of trees that is different for different kinds of trees |
the rate at which trees keep or lose their leaves is a characteristic of trees that is different for different kinds of trees & a characteristic of something that is different for different kinds of that something is a distinct characteristic of that something | that rate at which a kind of tree keeps or loses its leaves is a distinct characteristic of that kind of tree |
that rate at which a kind of tree keeps or loses its leaves is a distinct characteristic of that kind of tree & the rate at which a tree loses its leaves is used to catergorize trees | distinct characteristics of trees are used to catergorize trees |
the kind of fruit produced by trees is a chracteristic of trees & different kinds of trees produce different types of fruit | the kind of fruit produced by trees is a characteristic of trees that is different for different kinds of trees |
the kind of fruit produced by trees is a characteristic of trees that is different for different kinds of trees & a characteristic of something that is different for different kinds of that something is a distinct characteristic of that something | the type of fruit a kind of tree produces is a distinct characteristic of that kind of tree |
distinct characteristics of trees are used to catergorize trees & the type of fruit a kind of tree produces is a distinct characteristic of that kind of tree | the type of fruit a tree produces can be used to catergorize trees |
fungi have no chlorophyll & fungi can be multicellular | fungi have no chlorophyll and fungi can be multicellular |
fungi have no chlorophyll and fungi can be multicellular & fungi absorb nutrients from decaying tissue | fungi have no chlorophyll and fungi can be multicellular and fungi absorb nutrients from decaying tissue |
fungi have no chlorophyll and fungi can be multicellular and fungi absorb nutrients from decaying tissue & a fungus is a kind of organism | fungi are organisms that have no chlorophyll, can be multicellular, and absorb nutrients from decaying tissue |
fungi are organisms that have no chlorophyll, can be multicellular, and absorb nutrients from decaying tissue & fungi are part of the biological kingdom fungi | the biological kingdom fungi contains organisms that have no chlorophyll, can be multicellular, and absorb nutrients from decaying tissue |
a whale is a kind of mammal & a cat is a kind of mammal | a cat and a whale are both mammals |
a cat and a whale are both mammals & mammal is a kind of class of animal | a cat and a whale are part of the same class of animals |
an animal is a kind of living thing & living things in the same class are more closely related than living things in different classes | animals in the same class are more closely related than animals in different classes |
a cat and a whale are part of the same class of animals & animals in the same class are more closely related than animals in different classes | a cat is more closely related to a whale than to animals of a different class |
an animal is a kind of living thing1 & if two things have the same features then those two things are alike | if two things have different features then those two things are different |
if two things have different features then those two things are different & if things can be identified as different because of something then they are distinguishable by that something | things are distinguishable by their features |
an animal is a kind of living thing0 & a bird is a kind of animal | a bird and a mammal are both kinds of animals |
a bird and a mammal are both kinds of animals & an animal is a kind of living thing | a bird and a mammal are both kinds of things |
things are distinguishable by their features & a bird and a mammal are both kinds of things | mammals and birds are distinguishable by their features |
a bird is a kind of object & a mammal is a kind of object | a mammal is a kind of object and a bird is a kind of object |
a mammal is a kind of object and a bird is a kind of object & the parts of an object are features of that object | the parts of a mammal / bird are features of the mammal / bird |
feathers are a part of a bird & fur is usually part of a mammal | fur is a part of mammals and feathers are a part of birds |
the parts of a mammal / bird are features of the mammal / bird & fur is a part of mammals and feathers are a part of birds | fur is a feature of mammals and feathers are a feature of birds |
mammals and birds are distinguishable by their features & fur is a feature of mammals and feathers are a feature of birds | fur can be used to distinguish mammals from birds |
plants are a kind of eukaryote0 & a fungus is a kind of eukaryote | fungi are eukaryotes that obtain nutrients by absorption |
plants are a kind of eukaryote & animals are a kind of eukaryote | plants and animals are both eukaryotes |
plants and animals are both eukaryotes & if two things are both something else, then they are different kinds of that something else | plants and animals are different kinds of eukaryotes |
plants obtain nutrients through the method of photosynthesis & animals obtain nutrients through the method of consumption | plants and animals use different methods to obtain nutrients |
plants and animals are different kinds of eukaryotes & plants and animals use different methods to obtain nutrients | different kinds of eukaryotes use different methods for obtaining nutrients |