A substance that cannot be chemically broken down into simpler substances.
A substance formed when two or more chemical elements are chemically bonded together.
What is the symbol for hydrogen?
What is the symbol for Sodium?
What does the chemical symbol S stand for?
What does the chemical symbol N stand for?
Which of the following is a chemical formula?
Tell me which of the following represents chemical change.
Which of the following represents a physical change?
Which of the following is a property of metal?
The layers of the Earth in order from outside to inside are:
About how many tectonic plates make up the Earths lithosphere?
What layer of the Earth slides on top of the Asthenosphere allowing the plates to move?
At what type of boundary do plates collide?
At what type of boundary do volcanoes form?
At what type of boundary do Earthquakes form?
At what type of boundary do plates move away from each other?
What causes a tsunami?
The smallest unit of all living things is the:
Autotroph means that an organism:
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