Semester EXam review

Front

What do you call a mixture that contains some small particles in a solution?

Back

Colloid: A colloid is a mixture where small particles are dispersed throughout a substance, but are not heavy enough to settle out. Examples include milk and fog.

Front

What kind of energy comes from motion?

Back

Kinetic energy: Kinetic energy is the energy of an object due to its motion. The faster an object moves, the more kinetic energy it has.

Front

How would you write .0364 in scientific notation?

Back

3.64 x 10^-2: Scientific notation is a way of expressing numbers that are too big or too small in a compact form. .0364 is written as 3.64 x 10^-2.

Front

What is the mass number of an element with 13 protons, 13 electrons, and 14 neutrons?

Back

27: The mass number is the total number of protons and neutrons in an atom's nucleus. Here, 13 protons + 14 neutrons = 27.

Front

How would 4500 be written in scientific notation?

Back

4.5 x 10^3: In scientific notation, 4500 is expressed as 4.5 multiplied by 10 raised to the power of 3.

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What is a solution?

Back

Solution: A solution is a homogeneous mixture where one substance (the solute) is completely dissolved in another (the solvent). An example is saltwater.

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What is a suspension?

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Suspension: A suspension is a heterogeneous mixture where solid particles are suspended in a liquid or gas and can settle over time. An example is muddy water.

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What is thermal energy?

Back

Thermal energy: Thermal energy is the total energy of all the particles in an object due to their motion and position. It is often associated with heat.

Front

What is the difference between kinetic and potential energy?

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Kinetic energy is the energy of motion, while potential energy is stored energy based on an object's position or state.

Front

How do you convert a number to scientific notation?

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To convert to scientific notation, move the decimal point in the number until only one non-zero digit remains to its left, and count the number of places moved. This gives you the exponent.