Y8 Science Energy & Chemistry Revision

Which is not a type of potential energy?

• Gravitational

• Nuclear

• Chemical

• Kinetic

When a spring is compressed, what type of energy is stored?

• Kinetic energy

• Chemical potential energy

• Elastic potential energy

• Sound energy

What is the main type of energy transformation that occurs when a wood fire is lit?

• Chemical potential energy to sound energy

• Heat energy to light energy

• Chemical potential energy to heat energy

• Heat energy to chemical potential energy

What is an energy transformation?

• Where a type of energy goes into an object.

• Where a type of energy becomes another type of energy.

• Where a type of energy goes into another thing and stays the same type of energy.

• Where a type of energy becomes more powerful.

The energy efficiency equation is:

• $EE\ \left(\%\right)\ =\ \frac{total\ energy\ \left(J\right)}{useful\ energy\ \left(J\right)}\times100$

• $EE\ \left(\%\right)\ =\frac{useful\ energy\ \left(J\right)}{total\ energy\ \left(J\right)}\times100$

• $EE\ \left(\%\right)\ =\ \frac{wasted\ energy\ \left(J\right)}{useful\ energy\ \left(J\right)}\times100$

• $EE\ \left(\%\right)\ =\ \frac{total\ energy\ \left(J\right)}{wasted\ energy\ \left(J\right)}\ \times100$

Examine the Sankey diagram. Which statement is incorrect?

• It shows three types of wasted energy.

• The process shown is about 35% energy efficient.

• The largest arrow shows the useful energy.

• The top-most arrow shows the useful energy.

Why is water NOT on the periodic table?

• It is naturally occuring
• It is a compound, not an element
• It exists as a solid, a liquid, and a gas
• Its chemical formula doesn't fit

The smallest particle of any particular type of matter is known by which of the following terms?

• Compound
• Atom
• Chemical
• Element

The state of matter with the molecules with the LOWEST amount of energy is....

• Gas
• Solid
• Liquid

Which is the following is NOT a sign of a chemical change?

• Releasing a gas
• Releasing bubbles
• Changing state
• Rearranging atoms