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Which gas makes up about 20% of Earth's atmosphere?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
Mr. Parsons is helping his science class build a device that will produce electricity with a rotating magnet. What else must be included in the device in order for it to produce electricity?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
A substance with a pH of 2.3 is ________.
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
How is mass different from weight?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
Which substance is a compound?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
A team of astronomers observed two asteroids of equal mass traveling through our solar system. Which asteroid will be most attracted by Earth's gravity?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
Samantha is building an electric motor using a magnet and a length of thick wire. What shape must the wire have in order for her motor to work?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
Heat was applied to 500 milliliters of water until the temperature of the water reached 100 °C. What change happened to the water when it reached 100 °C?
an acid
oxygen
The asteroid that is closest to Earth.
The water molecules began physically changing to another phase.
coil
CH4
coiled
Mass is the amount of matter in an object, and weight is the amount of gravitational attraction an object has.
Check it!