a solid fossil fuel that formed from decayed plant material
What is coal
¿Qué es el carbón?
100
the amount of atoms in a element in a compound
What is a subscript
100
a change in a substance that doesn't change the identity of the substance.
What is physical change
100
An object has a mass of 645g and a volume of 3cm by 5cm by 2cm. What is the density?
What is 21.5
100
our bodies are mostly made up of which element
What is hydrogen
200
a natural resource that is used faster than it can be replaced
What is non-renewable resource
¿Qué es un recurso no renovable?
200
how many elements are in water
What is 2 elements (hydrogen and oxygen)
200
a change that results in the formation of a new substance or substances.
What is chemical change
200
An object has a mass of 40g and a volume of 2cm by 5cm by 2cm. What is the density?
What is 2
200
A sample of metal is placed on ice and quickly becomes cold to the touch. Which of the following properties is being demonstrated by this?
What is conductivity
300
an energy resource made from living things such as wood.
What is Biomass fuel
300
a pure substance that cannot be broken down to simpler substances by physical or chemical means
What is an element
300
a characteristic of an object or substance that can be observed directly or measure with a tool.
What is Physical Property
300
If a block has a mass of 84.8g and a volume of 4ml, what is the density of the block?
What is 21.2
300
a natural satellite
What is the moon
400
Tiny particles and gases released into the air is called
What is emission
¿Qué es la emisión?
400
when two or more element combine to form a compound
What is a chemical bond
400
a characteristic of a substance that determines how it will behave during a chemical reaction.
What is Chemical property
400
If a block has a mass of 24.6g and a volume of 3ml, what is the density of the block?
What is 8.2
400
the transfer of thermal energy between the Sun and other planets of the solar system
What is radiation
500
a large machine, powered by mechanical energy,that produces electricity
What is a turbine
¿Qué es una turbina?
500
How many hydrogen atoms are in water.
What is 2 atoms
500
the process by which new substances are formed.
What is Chemical reaction
500
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 4ml. The water rose to 12ml. If the mass of the stone was 32g, what is its density?
What is 4
500
a chunk of burning rock that passes through the Earth's atmosphere